istream的ignore使用

码丁农 2012-03-27 02:19:38
int _tmain(int argc, _TCHAR* argv[])
{
int val;

ifstream ifile("1.dat");

while (ifile >> val, !ifile.eof())
{
if (ifile.bad())
throw runtime_error("IO System Error.");

if (ifile.fail())
{
cerr << "bad val, try again";
ifile.clear(ifstream::failbit);
ifile.ignore(20, ' ');

continue;
}

cout << val;
}
return 0;
}


文件1.dat的内容很简单:
1 s 2

为什么执行的时候还是死循环,ifile.ignore没起作用?
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wenhong609 2012-03-27
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将ifile.clear(ifstream::failbit);改为ifile.clear();前者在VC和GCC下的支持不是很好!!!
mosal 2012-03-27
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哦了[Quote=引用 8 楼 dyzhen 的回复:]

找到原因了,

ifile.clear(ifstream::failbit);
改为
ifile.clear()
就可以了。

也许VC没有正确实现clear(istream::failtbit)
[/Quote]
码丁农 2012-03-27
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找到原因了,

ifile.clear(ifstream::failbit);
改为
ifile.clear()
就可以了。

也许VC没有正确实现clear(istream::failtbit)
码丁农 2012-03-27
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[Quote=引用 6 楼 mosal 的回复:]

我咋没问题C/C++ code
int main()
{

int val;

ifstream ifile("1.dat");

while (ifile >> val, !ifile.eof())
{
if (ifile.bad())
throw runtime_error("IO System Error.");
……
[/Quote]

您用的什么编译器?
mosal 2012-03-27
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我咋没问题
int main()
{

int val;

ifstream ifile("1.dat");

while (ifile >> val, !ifile.eof())
{
if (ifile.bad())
throw runtime_error("IO System Error.");

if (ifile.fail())
{
ifile.clear();
ifile.ignore(20, ' ');
continue;
}

cout << val << " ";
}
return 0;
}
码丁农 2012-03-27
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[Quote=引用 3 楼 pengzhixi 的回复:]

先说说你要干什么吧
[/Quote]

有个1.dat文件,里面的内容是:
1 s 2

我想通过上面的程序把数值读取出来..也就是说忽略调's'
pengzhixi 2012-03-27
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while (ifile >> val)
pengzhixi 2012-03-27
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先说说你要干什么吧
码丁农 2012-03-27
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[Quote=引用 1 楼 mosal 的回复:]

sync
[/Quote]

??
mosal 2012-03-27
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sync
第1章 计算机与C++编程简介 1.1 简介 1.2 什么是计算机 1.3 计算机组成 1.4 操作系统的变革 I.5 个人计算、分布式计算与客户/a匠务器计算 l. 6 机器语言、汇编语言和高级语言 1.7 C语言与C++的历史 1.8 C++标准库 1.9 Java、Internet与万维网 1.10 其他高级语言 1.11 结构化编程 1.12 典型C++环境基础 1.13 C++与本书的一般说明 1.14 C++编程简介 1.15 简单程序:打印一行文本 1.16 简单程序:两个整数相加 1.17 内存的概念 1.18 算术运算 1.19 判断:相等与关系运算符 1.20 新型头文件与名字空间 1.21 有关对象的思考 小结 术语 自测练习 自测练习答案 练习 第2章 控制结构 2.1 简介 2.2 算法 2.3 伪代码 2.4 控制结构 2.5 if选择结构 2.6 if/e1se选择结构 2.7 while重复结构 2.8 构造算法:实例研究1(计数器控制重复) 2.9 构造算法与自上而下逐步完善:实例研究2(标记控制重复) 2.10 构造算法与自上而下逐步完善:实例研究3(嵌套控制结构) 2.11 赋值运算符 2.12 自增和自减运算符 2.13 计数器控制循环的要点 2.14 for重复结构 2.15 for结构使用举例 2.16 switch多项选择结构 2.17 do/while重复结构 2.18 break和continue语句 2.19 逻辑运算符 2.20 混淆相等(.==)与赋值(=)运算符 2.21 结构化编程小结 2.22 有关对象的思考:确定问题中的对象 小结 术语 自测练习 自测练习答案 练习 第3章 函数 3.1 简介 3.2 C++程序组件 3.3 数学函数库 3.4 函数 3.5 函数定义 3.6 函数原型 3.7 头文件 3.8 随机数产生器 3.9 案例:机会游戏与enum简介 3.10 存储类 3.11 作用域规则 3.12 递归 3.13 使用递归举例:Fibonacci数列 3.14 递归与迭代 3.15 带空参数表的函数 3.16 内联函数 3.17 引用与引用参数 3.18 默认参数 3.19 一元作用域运算符 3.20 函数重载 3.21 函数模板 3.22 有关对象的思考:确定对象属性 小结 术语 自测练习 自测练习答案 练习 第4章 数组 4.1 简介 4.2 数组 4.3 声明数组 4.4 使用数组的举例 4.5 将数组传递给函数 4.6 排序数组 4.7 实例研究:用数组计算平均值、中数和模 4.8 查找数组:线性查找与折半查找 4.9 多下标数组 4.10 有关对象的思考:确定类的行为 小结 术语 自测练习 自测练习答案 练习 递归练习 第5章 指针与字符串 5.1 简介 5.2 指针变量的声明与初始化 5.3 指针运算符 5.4 按引用调用函数 5.5 指针与常量限定符 5.6 按引用调用的冒泡排序 5.7 指针表达式与指针算法 5.8 指针与数组的关系 5.9 指针数组 5.10 实例研究:洗牌与发牌 5.11 函数指针 5.12 字符与字符串处理简介 5.12.1 字符与字符串基础 5.12.2 字符串处理库的字符串操作函数 5.13 有关对象的思考:对象间的交互 小结 术语 自测练习 自测练习答案 练习 特殊小节:建立自己的计算机 更多的指针练习 字符串操作练习 特殊小节:高级字符串操作练习 复杂字符串操作练习 第6章 类与数据抽象(一) 6.1 简介 6.2 结构定义 6.3 访问结构成员 6.4 用struct实现用户自定义类型Time 6.5 用类实现Time抽象数据类型 6.6 类范围与访问类成员 6.7 接口与实现方法的分离 6.8 控制对成员的访问 6.9 访问函数与工具函数 6.10 初始化类对象:构造函数 6.11 在构造函数中使用默认参数 6.12 使用析构函数 6.13 何时调用构造函数与析构函数 6.14 使用数据成员和成员函数 6.15 微妙的陷阱:返回对Private数据成员的引用 6.16 通过默认的成员复制进行赋值 6.17 软件复用性 6.18 有关对象的思考:编写电梯模拟程序的类 小结 术语 自测练习 自测练习答案 练习 第7章 类与数据抽象(二) 7. 1 简介 7.2 const(常量)对象与const成员函数 7.3 复合:把对象作为类成员 7.4 友元函数与友元类 7.5 使用this指针 7.6 动态内存分配与new和delete运算符 7.7 static类成员 7.8 数据抽象与信息隐藏 7.8.1 范例:数组抽象数据类型 7.8.2 范例:字符串抽象数据类型 7.8.3 范例:队列抽象数据类型 7.9 容器类与迭代 7.10 代理类 7.11 有关对象的思考:在电梯模拟程序中使用复合和动态对象管理 小结 术语 自测练习 自测练习答案 练习 第8章 运算符重载 8.1 简介 8.2 运算符重载的基础 8.3 运算符重载的限制 8.4 用作类成员与友元函数的运算符函数 8.5 重载流插入与流读取运算符 8.6 重载一元运算符 8.7 重载二元运算符 8.8 实例研究:Array类 8.9 类型之间的转换 8.10 实例研究:String类 8.11 重载十十与—— 8.12 实例研究:Date类 小结 术语 自测练习 自测练习答案 练习 第9章 继承 9.1 简介 9.2 继承:基类和派生类 9.3 Protected成员 9.4 把基类指针强制转换为派生类指针 9.5 使用成员函数 9.6 在派生类中重定义基类成员 9.7 Public、Protected和Private继承 9.8 直接基类和间接基类 9.9 在派生类中使用构造函数和析构函数 9.10 将派生类对象隐式转换为基类对象 9.11 关于继承的软件工程 9.12 复合与继承的比较 9.13 对象的“使用”关系和“知道”关系 9.14 实例研究:类Point、CircIe和Cylinder 9.15 多重继承 小结 术语 自测练习 自测练习答案 练习 第10章 虚函数和多态性 10.1 简介 10.2 类型域和switch语句 10.3 虚函数 10.4 抽象基类和具体类 10.5 多态性 10.6 实例研究:利用多态性的工资单系统 10.7 新类和动态关联 10.8 虚析构函数 10.9 实例研究:继承接口和实现 10.10 多态、虚函数和动态关联 小结 术语 自测练习 自测练习答案 练习 第11章 C++输入/输出流 11.1 简介 11.2 流 11.2.1 iosbeam类库的头文件 11.2.2 输入/输出流类和对象 11.3 输出流 11.3.1 流插入运算符 11.3. 2 连续使用流插入/流读取运算符 11.3.3 输出char类型的变量 11.3.4 用成员函数put输出字符和put函数的连续调用 11.4 输入流 11.4.1 流读取运算符 11.4.2 成员函数get和getline 11.4.3 istream类中的其他成员函数(Peek、Putback和ignore) 11.4.4 类型安全的I/0 11.5 成员函数read、gcount和write的无格式输人/输出 11.6 流操纵算子 11.6.1 整数流的基数:流操纵算子dec、oct、hex和setbase 11.6.2 设置浮点数精度(Precision、setprecision) 11.6.3 设置域宽(setw、width) 11.6.4 用户自定义的流操纵算子 11.7 流格式状态 11.7.1 格式状态标志 11.7.2 尾数零和十进制小数点(ios:showpoint) 11.7.3 对齐(ios::left、ios::right、ios::internal) 11.7.4 设置填充字符(fill、setfill) 11.7.5 整数流的基数:(ios::dec、ios::oct、ios::hex、ios::showbase) 11. 7.6 浮点数和科学记数法(ios::scientific、ios::fixed) 11.7.7 大/小写控制(ios:uppercase) 11.7.8 设置及清除格式标志(flags、setiosflags、resetiosflags) 11.8 流错误状态 11.9 把输出流连到输入流上 小结 术语 自测练习 自测练习答案 练习 第12章 模板 12.1 简介 12.2 函数模板 12.3 重载模板函数 12.4 类模板 12.5 类模板与非类型参数 12.6 模板与继承 12.7 模板与友元 12.8 模板与static成员 小结 术语 自测练习 自测练习答案 练习 第13章 异常处理 13.1 简介 13.2 何时使用异常处理 13.3 其他错误处理方法 13.4 C十十异常处理基础:try、throw、catch 13.5 简单异常处理例子:除数为o 13.6 抛出异常 13.7 捕获异常 13.8 再抛出异常 13.9 异常指定 13.10 处理意外异常 13.11 堆栈解退 13.12 构造函数、析构函数与异常处理 13.13 异常与继承 13.14 处理new故障 13.15 auto_ptr类与动态内存分配 13.16 标准库异常层次 小结 术语 自测练习 自测练习答案 练习 第14章 文件处理 14.1 简介 14.2 数据的层次 14.3 文件和流 14.4 建立顺序访问文件 14.5 读取顺序访问文件中的数据 14.6 更新顺序访问文件 14.7 随机访问文件 14.8 建立随机访问文件 14.9 向随机访问文件中随机地写入数据 14.10 从随机访问文件中顺序地读取数据 14.11 实例研究:事务处理程序 14.12 对象的输入/输出 小结 术语 自测练习 自测练习答案 练习 第15章 数据结构 15.1 简介 15.2 自引用类 15.3 动态内存分配 15.4 链表 15.5 堆栈 15.6 队列 15.7 树 小结 术语 自测练习 自测练习答案 练习 特殊小节:建立自己的编译器 第16章 位、字符、字符串和结构 16.1 简介 16.2 结构的定义 16.3 结构的初始化 16.4 函数和结构 16.5 类型定义:typedef 16. 6 范例:高效的洗牌和发牌模拟程序 16.7 位运算符 16.8 位段 16.9 字符处理库 16.10 字符串转换函数 16.11 字符串处理库中的查找函数 16.12 字符串处理库中的内存函数 16.13 字符串处理库中的其他函数 小结 术语 自测练习 自测练习答案 练习 第17章 预处理器 17.1 简介 17.2 预处理指令#include 17.3 预处理指令#define:符号常量 17.4 预处理指令#define:宏 17.5 条件编译 17.6 预处理指令#error和#pragma 17.7 运算符#和## 17.8 行号 17.9 预定义的符号常量 17.10 断言(宏assert) 小结 术语 自测练习 自测练习答案 练习 第18章 C语言遗留代码问题 18.1 简介 18.2 UNIX和DOS系统中的输入/输出重定向 18.3 变长参数表 18.4 使用命令行参数 18.5 对编译多个源文件程序的说明 18. 6 用edt和atexit终止程序的执行 18.7 volatile类型限定符 18.8 整数和浮点数常量的后缀 18.9 信号处理 18.10 动态内存分配:函数calloc和realloc 18.11 无条件转移:goto语句 18.12 联合体 18.13 连接指定 小结 术语 自测练习 自测练习答案 练习 第19章 string类与字符串流处理 19.1 简介 19.2 string的赋值与连接 19.3 比较string 19.4 子串 19.5 交换string 19.6 string的特性 19.7 寻找string中的字符 19.8 替换string中的字符 19.9 在string中插入字符 19.10 转换成C语言式char 字符串 19.11 迭代器 19.12 字符串流处理 小结 术语 自测练习 自测练习答案 练习 第20章 标准模板库(STL) 20.1 标准模板库(STL)简介 20.1.1 容器简介 20.1.2 迭代器简介 20.1.3 算法简介 20.2 顺序容器 20.2.1 vector顺序容器 20.2.2 1ist顺序容器 20.2.3 deque顺序容器 20.3 关联容器 20.3.1 multiset关联容器 20. 3.2 set关联容器 20.3.3 mdtimap关联容器 20.3.4 map关联容器 20.4 容器适配器 20.4.1 stack适配器 20.4.2 queue适配器 20.4.3 Priority_queue适配器 20.5 算法 20.5.1 fill、fill_n、generate与generate_n 20.5.2 equal、mismatch和1exicographical_compare 20.5.3 remove、remove_if、 remove_copy和remove_copy_if 20.5.4 replace、replace_if、replace_copy和replace_copy_if 20.5.5 数学算法 20.5.6 基本查找与排序算法 20.5.7 swap、iter_swap和swap_ranges 20.5.8 copy—backward、 merge、 unique和reverse 20.5.9 inplace_merge、 unique—copy和reverse—copy 20.5.10 集合操作 20.5.11 1ower—bound、 upper—bound和equal_range 20.5.12 堆排序 20.5.13 min和max 20.5.14 本章未介绍的算法 20.6 bitset类 20.7 函数对象 小结 术语 自测练习 自测练习答案 练习 Internet和World Wide Web中的STL资源 STL文献 第21章 ANSI/ISO C++标准语言补充 21.1 简介 21.2 bool数据类型 21.3 static—cast运算符 21.4 const—cast运算符 21.5 reinterpret—cast运算符 21.6 名字空间 21.7 运行时类型信息(RTTI) 21.8 运算符关键字 21.9 explicit构造函数 21.10 mutable类成员 21.11 类成员指针(.和—>) 21.12 多重继承与virtual基类 21.13 结束语 小结 术语 自测练习 自测练习答案 练习 附录A 运算符的优先级与结台律 附录B ASCII字符集 附录C 数值系统 附录D 有关C++的Internet与Web资源 参考文献 【媒体评论】
第1章 计算机与C++编程简介 1.1 简介 1.2 什么是计算机 1.3 计算机组成 1.4 操作系统的变革 I.5 个人计算、分布式计算与客户/a匠务器计算 l. 6 机器语言、汇编语言和高级语言 1.7 C语言与C++的历史 1.8 C++标准库 1.9 Java、Internet与万维网 1.10 其他高级语言 1.11 结构化编程 1.12 典型C++环境基础 1.13 C++与本书的一般说明 1.14 C++编程简介 1.15 简单程序:打印一行文本 1.16 简单程序:两个整数相加 1.17 内存的概念 1.18 算术运算 1.19 判断:相等与关系运算符 1.20 新型头文件与名字空间 1.21 有关对象的思考 小结 术语 自测练习 自测练习答案 练习 第2章 控制结构 2.1 简介 2.2 算法 2.3 伪代码 2.4 控制结构 2.5 if选择结构 2.6 if/e1se选择结构 2.7 while重复结构 2.8 构造算法:实例研究1(计数器控制重复) 2.9 构造算法与自上而下逐步完善:实例研究2(标记控制重复) 2.10 构造算法与自上而下逐步完善:实例研究3(嵌套控制结构) 2.11 赋值运算符 2.12 自增和自减运算符 2.13 计数器控制循环的要点 2.14 for重复结构 2.15 for结构使用举例 2.16 switch多项选择结构 2.17 do/while重复结构 2.18 break和continue语句 2.19 逻辑运算符 2.20 混淆相等(.==)与赋值(=)运算符 2.21 结构化编程小结 2.22 有关对象的思考:确定问题中的对象 小结 术语 自测练习 自测练习答案 练习 第3章 函数 3.1 简介 3.2 C++程序组件 3.3 数学函数库 3.4 函数 3.5 函数定义 3.6 函数原型 3.7 头文件 3.8 随机数产生器 3.9 案例:机会游戏与enum简介 3.10 存储类 3.11 作用域规则 3.12 递归 3.13 使用递归举例:Fibonacci数列 3.14 递归与迭代 3.15 带空参数表的函数 3.16 内联函数 3.17 引用与引用参数 3.18 默认参数 3.19 一元作用域运算符 3.20 函数重载 3.21 函数模板 3.22 有关对象的思考:确定对象属性 小结 术语 自测练习 自测练习答案 练习 第4章 数组 4.1 简介 4.2 数组 4.3 声明数组 4.4 使用数组的举例 4.5 将数组传递给函数 4.6 排序数组 4.7 实例研究:用数组计算平均值、中数和模 4.8 查找数组:线性查找与折半查找 4.9 多下标数组 4.10 有关对象的思考:确定类的行为 小结 术语 自测练习 自测练习答案 练习 递归练习 第5章 指针与字符串 5.1 简介 5.2 指针变量的声明与初始化 5.3 指针运算符 5.4 按引用调用函数 5.5 指针与常量限定符 5.6 按引用调用的冒泡排序 5.7 指针表达式与指针算法 5.8 指针与数组的关系 5.9 指针数组 5.10 实例研究:洗牌与发牌 5.11 函数指针 5.12 字符与字符串处理简介 5.12.1 字符与字符串基础 5.12.2 字符串处理库的字符串操作函数 5.13 有关对象的思考:对象间的交互 小结 术语 自测练习 自测练习答案 练习 特殊小节:建立自己的计算机 更多的指针练习 字符串操作练习 特殊小节:高级字符串操作练习 复杂字符串操作练习 第6章 类与数据抽象(一) 6.1 简介 6.2 结构定义 6.3 访问结构成员 6.4 用struct实现用户自定义类型Time 6.5 用类实现Time抽象数据类型 6.6 类范围与访问类成员 6.7 接口与实现方法的分离 6.8 控制对成员的访问 6.9 访问函数与工具函数 6.10 初始化类对象:构造函数 6.11 在构造函数中使用默认参数 6.12 使用析构函数 6.13 何时调用构造函数与析构函数 6.14 使用数据成员和成员函数 6.15 微妙的陷阱:返回对Private数据成员的引用 6.16 通过默认的成员复制进行赋值 6.17 软件复用性 6.18 有关对象的思考:编写电梯模拟程序的类 小结 术语 自测练习 自测练习答案 练习 第7章 类与数据抽象(二) 7. 1 简介 7.2 const(常量)对象与const成员函数 7.3 复合:把对象作为类成员 7.4 友元函数与友元类 7.5 使用this指针 7.6 动态内存分配与new和delete运算符 7.7 static类成员 7.8 数据抽象与信息隐藏 7.8.1 范例:数组抽象数据类型 7.8.2 范例:字符串抽象数据类型 7.8.3 范例:队列抽象数据类型 7.9 容器类与迭代 7.10 代理类 7.11 有关对象的思考:在电梯模拟程序中使用复合和动态对象管理 小结 术语 自测练习 自测练习答案 练习 第8章 运算符重载 8.1 简介 8.2 运算符重载的基础 8.3 运算符重载的限制 8.4 用作类成员与友元函数的运算符函数 8.5 重载流插入与流读取运算符 8.6 重载一元运算符 8.7 重载二元运算符 8.8 实例研究:Array类 8.9 类型之间的转换 8.10 实例研究:String类 8.11 重载十十与—— 8.12 实例研究:Date类 小结 术语 自测练习 自测练习答案 练习 第9章 继承 9.1 简介 9.2 继承:基类和派生类 9.3 Protected成员 9.4 把基类指针强制转换为派生类指针 9.5 使用成员函数 9.6 在派生类中重定义基类成员 9.7 Public、Protected和Private继承 9.8 直接基类和间接基类 9.9 在派生类中使用构造函数和析构函数 9.10 将派生类对象隐式转换为基类对象 9.11 关于继承的软件工程 9.12 复合与继承的比较 9.13 对象的“使用”关系和“知道”关系 9.14 实例研究:类Point、CircIe和Cylinder 9.15 多重继承 小结 术语 自测练习 自测练习答案 练习 第10章 虚函数和多态性 10.1 简介 10.2 类型域和switch语句 10.3 虚函数 10.4 抽象基类和具体类 10.5 多态性 10.6 实例研究:利用多态性的工资单系统 10.7 新类和动态关联 10.8 虚析构函数 10.9 实例研究:继承接口和实现 10.10 多态、虚函数和动态关联 小结 术语 自测练习 自测练习答案 练习 第11章 C++输入/输出流 11.1 简介 11.2 流 11.2.1 iosbeam类库的头文件 11.2.2 输入/输出流类和对象 11.3 输出流 11.3.1 流插入运算符 11.3. 2 连续使用流插入/流读取运算符 11.3.3 输出char类型的变量 11.3.4 用成员函数put输出字符和put函数的连续调用 11.4 输入流 11.4.1 流读取运算符 11.4.2 成员函数get和getline 11.4.3 istream类中的其他成员函数(Peek、Putback和ignore) 11.4.4 类型安全的I/0 11.5 成员函数read、gcount和write的无格式输人/输出 11.6 流操纵算子 11.6.1 整数流的基数:流操纵算子dec、oct、hex和setbase 11.6.2 设置浮点数精度(Precision、setprecision) 11.6.3 设置域宽(setw、width) 11.6.4 用户自定义的流操纵算子 11.7 流格式状态 11.7.1 格式状态标志 11.7.2 尾数零和十进制小数点(ios:showpoint) 11.7.3 对齐(ios::left、ios::right、ios::internal) 11.7.4 设置填充字符(fill、setfill) 11.7.5 整数流的基数:(ios::dec、ios::oct、ios::hex、ios::showbase) 11. 7.6 浮点数和科学记数法(ios::scientific、ios::fixed) 11.7.7 大/小写控制(ios:uppercase) 11.7.8 设置及清除格式标志(flags、setiosflags、resetiosflags) 11.8 流错误状态 11.9 把输出流连到输入流上 小结 术语 自测练习 自测练习答案 练习 第12章 模板 12.1 简介 12.2 函数模板 12.3 重载模板函数 12.4 类模板 12.5 类模板与非类型参数 12.6 模板与继承 12.7 模板与友元 12.8 模板与static成员 小结 术语 自测练习 自测练习答案 练习 第13章 异常处理 13.1 简介 13.2 何时使用异常处理 13.3 其他错误处理方法 13.4 C十十异常处理基础:try、throw、catch 13.5 简单异常处理例子:除数为o 13.6 抛出异常 13.7 捕获异常 13.8 再抛出异常 13.9 异常指定 13.10 处理意外异常 13.11 堆栈解退 13.12 构造函数、析构函数与异常处理 13.13 异常与继承 13.14 处理new故障 13.15 auto_ptr类与动态内存分配 13.16 标准库异常层次 小结 术语 自测练习 自测练习答案 练习 第14章 文件处理 14.1 简介 14.2 数据的层次 14.3 文件和流 14.4 建立顺序访问文件 14.5 读取顺序访问文件中的数据 14.6 更新顺序访问文件 14.7 随机访问文件 14.8 建立随机访问文件 14.9 向随机访问文件中随机地写入数据 14.10 从随机访问文件中顺序地读取数据 14.11 实例研究:事务处理程序 14.12 对象的输入/输出 小结 术语 自测练习 自测练习答案 练习 第15章 数据结构 15.1 简介 15.2 自引用类 15.3 动态内存分配 15.4 链表 15.5 堆栈 15.6 队列 15.7 树 小结 术语 自测练习 自测练习答案 练习 特殊小节:建立自己的编译器 第16章 位、字符、字符串和结构 16.1 简介 16.2 结构的定义 16.3 结构的初始化 16.4 函数和结构 16.5 类型定义:typedef 16. 6 范例:高效的洗牌和发牌模拟程序 16.7 位运算符 16.8 位段 16.9 字符处理库 16.10 字符串转换函数 16.11 字符串处理库中的查找函数 16.12 字符串处理库中的内存函数 16.13 字符串处理库中的其他函数 小结 术语 自测练习 自测练习答案 练习 第17章 预处理器 17.1 简介 17.2 预处理指令#include 17.3 预处理指令#define:符号常量 17.4 预处理指令#define:宏 17.5 条件编译 17.6 预处理指令#error和#pragma 17.7 运算符#和## 17.8 行号 17.9 预定义的符号常量 17.10 断言(宏assert) 小结 术语 自测练习 自测练习答案 练习 第18章 C语言遗留代码问题 18.1 简介 18.2 UNIX和DOS系统中的输入/输出重定向 18.3 变长参数表 18.4 使用命令行参数 18.5 对编译多个源文件程序的说明 18. 6 用edt和atexit终止程序的执行 18.7 volatile类型限定符 18.8 整数和浮点数常量的后缀 18.9 信号处理 18.10 动态内存分配:函数calloc和realloc 18.11 无条件转移:goto语句 18.12 联合体 18.13 连接指定 小结 术语 自测练习 自测练习答案 练习 第19章 string类与字符串流处理 19.1 简介 19.2 string的赋值与连接 19.3 比较string 19.4 子串 19.5 交换string 19.6 string的特性 19.7 寻找string中的字符 19.8 替换string中的字符 19.9 在string中插入字符 19.10 转换成C语言式char 字符串 19.11 迭代器 19.12 字符串流处理 小结 术语 自测练习 自测练习答案 练习 第20章 标准模板库(STL) 20.1 标准模板库(STL)简介 20.1.1 容器简介 20.1.2 迭代器简介 20.1.3 算法简介 20.2 顺序容器 20.2.1 vector顺序容器 20.2.2 1ist顺序容器 20.2.3 deque顺序容器 20.3 关联容器 20.3.1 multiset关联容器 20. 3.2 set关联容器 20.3.3 mdtimap关联容器 20.3.4 map关联容器 20.4 容器适配器 20.4.1 stack适配器 20.4.2 queue适配器 20.4.3 Priority_queue适配器 20.5 算法 20.5.1 fill、fill_n、generate与generate_n 20.5.2 equal、mismatch和1exicographical_compare 20.5.3 remove、remove_if、 remove_copy和remove_copy_if 20.5.4 replace、replace_if、replace_copy和replace_copy_if 20.5.5 数学算法 20.5.6 基本查找与排序算法 20.5.7 swap、iter_swap和swap_ranges 20.5.8 copy—backward、 merge、 unique和reverse 20.5.9 inplace_merge、 unique—copy和reverse—copy 20.5.10 集合操作 20.5.11 1ower—bound、 upper—bound和equal_range 20.5.12 堆排序 20.5.13 min和max 20.5.14 本章未介绍的算法 20.6 bitset类 20.7 函数对象 小结 术语 自测练习 自测练习答案 练习 Internet和World Wide Web中的STL资源 STL文献 第21章 ANSI/ISO C++标准语言补充 21.1 简介 21.2 bool数据类型 21.3 static—cast运算符 21.4 const—cast运算符 21.5 reinterpret—cast运算符 21.6 名字空间 21.7 运行时类型信息(RTTI) 21.8 运算符关键字 21.9 explicit构造函数 21.10 mutable类成员 21.11 类成员指针(.和—>) 21.12 多重继承与virtual基类 21.13 结束语 小结 术语 自测练习 自测练习答案 练习 附录A 运算符的优先级与结台律 附录B ASCII字符集 附录C 数值系统 附录D 有关C++的Internet与Web资源 参考文献 【媒体评论】
Drag and Drop Component Suite Version 4.1 Field test 5, released 16-dec-2001 ?1997-2001 Angus Johnson & Anders Melander http://www.melander.dk/delphi/dragdrop/ ------------------------------------------- Table of Contents: ------------------------------------------- 1. Supported platforms 2. Installation 3. Getting started 4. Known problems 5. Support and feedback 6. Bug reports 7. Upgrades and bug fixes 8. Missing in this release 9. New in version 4.x 10. TODO 11. Licence, Copyright and Disclaimer 12. Release history ------------------------------------------- 1. Supported platforms: ------------------------------------------- This release supports Delphi 4-6 and C++ Builder 4-5. Earlier versions of Delphi and C++ Builder will not be supported. If you need Delphi 3 or C++ Builder 3 support you will have to revert to version 3.7 of the Drag and Drop Component Suite. The library has been tested on NT4 service pack 5 and Windows 2000. Windows 95, 98, ME and XP should be supported, but has not been tested. Linux and Kylix are not supported. There are *NO* plans to port the library to Kylix. The drag and drop protocols available on Linux are too much of a mess at this time. ------------------------------------------- 2. Installation: ------------------------------------------- 1) Before you do anything else, read the "Known problems" section of this document. 2) Install the source into a directory of your choice. The files are installed into three directories: DragDrop DragDrop\Components DragDrop\Demo 3) Install and compile the appropriate design time package. The design time packages are located in the Components directory. Each version of Delphi and C++ Builder has its own package; DragDropD6.dpk for Delphi 6, DragDropD5.dpk for Delphi 5, DragDropC5.bpk for C++ Builder 5, etc. 4) Add the Drag and Drop Component Suite components directory to your library path. 5) Load the demo project group: demo\dragdrop_delphi.bpg for Delphi 5 and 6 demo\dragdrop_bcb4.bpg for C++ Builder 4 demo\dragdrop_bcb5.bpg for C++ Builder 5 The project group contains all the demo applications. 6) If your version of Delphi does not support text format DFM files (e.g. Delphi 4 doesn't), you will have to use the convert.exe utility supplied with Delphi to convert all the demo form files to binary format. A batch file, convert_forms_to delphi_4_format.bat, is supplied in the demo directory which automates the conversion process. The C++ Builder demo forms are distributed in binary format. 7) If upgrading from a previous version of the Drag and Drop Component Suite, please read the document "upgrading_to_v4.txt" before you begin working on your existing projects. Note about "Property does not exist" errors: Since all demos were developed with the latest version of Delphi, most of the demo forms probably contains references to properties that doesn't exist in earlier versions of Delphi and C++ Builder. Because of this you will get fatal run-time errors (e.g. "Error reading blahblahblah: Property does not exist.") if you attemt to run the demos without fixing this problem. Luckily it is very easy to make the forms work again; Just open the forms in the IDE, then select "Ignore All" when the IDE complains that this or that property doesn't exist and finally save the forms. ------------------------------------------- 3. Getting started: ------------------------------------------- It is recommended that you start by running each of the demo applications and then look through the demo source. Each demo application is supplied with a readme.txt file which briefly describes what the demo does and what features it uses. The demos should be run in the order in which they are listed in the supplied project group. Even if you have used previous versions of the Drag and Drop Component Suite it would be a good idea to have a quick look at the demos. The library has been completely rewritten and a lot of new features has been added. ------------------------------------------- 4. Known problems: ------------------------------------------- * The Shell Extension components does not support C++ Builder 4. For some strange reason the components causes a link error. * There appear to be sporadic problems compiling with C++ Builder 5. Several user have reported that they occasionally get one or more of the following compiler errors: [C++ Error] DragDropFile.hpp(178): E2450 Undefined structure '_FILEDESCRIPTORW' [C++ Error] DropSource.hpp(135): E2076 Overloadable operator expected I have not been able to reproduce these errors, but I believe the following work around will fix the problem: In the project options of *all* projects which uses these components, add the following conditional define: NO_WIN32_LEAN_AND_MEAN The define *must* be made in the project options. It is not sufficient to #define it in the source. If you manage to compile with C++ Builder (any version), I would very much like to know about it. * Delphi's and C++ Builder's HWND and THandle types are not compatible. For this reason it might be nescessary to cast C++ Builder's HWND values to Delphi's THandle type when a HWND is passed to a function. E.g.: if (DragDetectPlus(THandle(MyControl->Handle), Point(X, Y))) { ... } * Virtual File Stream formats can only be pasted from the clipboard with live data (i.e. FlushClipboard/OleFlushClipboard hasn't been called on the data source). This problem affects TFileContentsStreamOnDemandClipboardFormat and the VirtualFileStream demo. This is believed to be a bug in the Windows clipboard and a work around hasn't been found yet. * Asynchronous targets appears to be broken in the current release. * When TDropFileTarget.GetDataOnEnter is set to True, the component doesn't work with WinZip. Although the file names are received correctly by TDropFileTarget, WinZip doesn't extract the files and the files thus can't be copied/moved. This is caused by a quirk in WinZip; Apparently WinZip doesn't like IDataObject.GetData to be called before IDropTarget.Drop is called. ------------------------------------------- 5. Support and feedback: ------------------------------------------- Since these components are freeware they are also unsupported. You are welcome to ask for help via email, but I cannot guarantee that I will have time to help you or even reply to your mail. If you absolytely can't live without my help, you can alway try bribing me. You can also try asking for help in the Delphi newsgroups. Since the Drag and Drop Component Suite is in widespread use, there's a good chance another user can help you. I recommend the following newsgroups for issues regarding this library (or COM based Drag/Drop in general): borland.public.delphi.winapi borland.public.delphi.thirdparty-tools borland.public.delphi.oleautomation borland.public.cppbuilder.winapi borland.public.cppbuilder.thirdparty-tools Please choose the most appropiate newsgroup for your question. Do not cross post to them all. Before posting to the newsgroups, I suggest you try to search for an answer on the Google (DejaNews) search engine: http://groups.google.com Chances are that your question has been asked and answered before. If you have suggestions for improvements please mail them to me: anders@melander.dk Please include the words "Drag Drop" in the subject of any email regarding these components. ------------------------------------------- 6. Bug reports: ------------------------------------------- Bugs can either be reported at my home page (http://www.melander.dk/) or mailed directly to me: anders@melander.dk. When reporting a bug, please provide the following information: * The exact version of the Drag and Drop Component Suite you are using. * The exact version of Delphi or C++ Builder you are using. * The name and exact version of your operating system (e.g. NT4 SP5). * The exact version of the Internet Explorer installed on your system. If you can provide me with a minimal application which reproduces the problem, I can almost guarantee that I will be able to fix the problem in very short time. Please supply only the source files (pas, dfm, dpr, dof, res, etc.) and mail them as a single zip file. If I need a compiled version I will ask for it. If you feel you need to send me a screen shot, please send it in GIF or PNG format. If you mail a bug report to me, please include the words "Drag Drop" in the subject of your email. ------------------------------------------- 7. Upgrades and bug fixes: ------------------------------------------- Upgrades can be downloaded from my home page: http://www.melander.dk/delphi/dragdrop/ Bug fixes will also be posted to the above page. If you have registered for update notification via the installation program, you will receive email notification when a new release is available. You will not be notified of bug fixes. You can use the installation program to check for and download new releases and to check for known bugs. Note: If a new release is made available and you are not notified even though you registered for notification, you probably mistyped your email address during installation; About 10% of all registrations supply an invalid email address. ------------------------------------------- 8. Missing in this release: ------------------------------------------- * On-line help has not been updated and included in the kit due to late changes in the Delphi 6 help system and lack of time. If time permits, I will update the help and include it in a future release. ------------------------------------------- 9. New in version 4.x: ------------------------------------------- * Completely redesigned and rewritten. Previous versions of the Drag and Drop Component Suite used a very monolithic design and flat class hierachy which made it a bit cumbersome to extend the existing components or implement new ones. Version 4 is a complete rewrite and redesign, but still maintains compatibility with previous versions. The new V4 design basically separates the library into three layers: 1) Clipboard format I/O. 2) Data format conversion and storage. 3) COM Drag/Drop implementation and VCL component interface. The clipboard format layer is responsible for reading and writing data in different formats to and from an IDataObject interface. For each different clipboard format version 4 implements a specialized class which knows exactly how to interpret the clipboard format. For example the CF_TEXT (plain text) clipboard format is handled by the TTextClipboardFormat class and the CF_FILE (file names) clipboard format is handled by the TFileClipboardFormat class. The data format layer is primarily used to render the different clipboard formats to and from native Delphi data types. For example the TTextDataFormat class represents all text based clipboard formats (e.g. TTextClipboardFormat) as a string while the TFileDataFormat class represents a list of file names (e.g. TFileClipboardFormat) as a string list. The conversion between different data- and clipboard formats is handled by the same Assign/AssignTo mechanism as the VCLs TPersistent employes. This makes it possible to extend existing data formats with support for new clipboard formats without modification to the existing classes. The drag/drop component layer has several tasks; It implements the actual COM drag/drop functionality (i.e. it implements the IDropSource, IDropTarget and IDataObject interfaces (along with several other related interfaces)), it surfaces the data provided by the data format layer as component properties and it handles the interaction between the whole drag/drop framework and the users code. The suite provides a multitude of different components. Most are specialized for different drag/drop tasks (e.g. the TDropFileTarget and TDropFilesSource components for drag/drop of files), but some are either more generic, handling multiple unrelated formats, or simply helper components which are used to extend the existing components or build new ones. * Support for Delphi 6. Version 4.0 was primarily developed on Delphi 6 and then ported back to previous versions of Delphi and C++ Builder. * Support for Windows 2000 inter application drag images. On Windows platforms which supports it, drag images are now displayed when dragging between applications. Currently only Windows 2000 supports this feature. On platforms which doesn't support the feature, drag images are only displayed whithin the source application. * Support for Windows 2000 asynchronous data transfers. Asynchronous data tranfers allows the drop source and targets to perform slow transfers or to transfer large amounts of data without blocking the user interface while the data is being transfered. For platforms other than Windows 2000, the new TDropSourceThread class can be used to provide similar (but more limited) asynchronous data transfer capabilities. * Support for optimized and non-optimized move. When performing drag-move operations, it is now possible to specify if the target (optimized move) or the source (non-optimized move) is responsible for deleting the source files. * Support for delete-on-paste. When data is cut to the clipboard, it is now possible to defer the deletion of the source data until the target actually pastes the data. The source is notified by an event when the target pastes the data. * Extended clipboard support. All formats and components (both source and target) now support clipboard operations (copy/cut/paste) and the VCL clipboard object. * Support for shell drop handlers. The new TDropHandler component can be used to write drop handler shell extensions. A drop handler is a shell extension which is executed when a user drags and drops one or more files on a file associated wth your application. * Support for shell drag drop handlers. The new TDragDropHandler component can be used to write drag drop handler shell extensions. A drag drop handler is a shell extension which can extend the popup menu which is displayed when a user drag and drops files with the right mouse button. * Support for shell context menu handlers. The new TDropContextMenu component can be used to write context menu handler shell extensions. A context menu handler is a shell extension which can extend the popup menu which is displayed when a user right-clicks a file in the shell. * Drop sources can receive data from drop targets. It is now possible for drop targets to write data back to the drop source. This is used to support optimized-move, delete-on-paste and inter application drag images. * Automatic re-registration of targets when the target window handle is recreated. In previous versions, target controls would loose their ability to accept drops when their window handles were recreated by the VCL (e.g. when changing the border style or docking a form). This is no longer a problem. * Support for run-time definition of custom data formats. You can now add support for new clipboard formats without custom components. * Support for design-time extension of existing source and target components. Using the new TDataFormatAdapter component it is now possible to mix and match data formats and source and target components at design time. E.g. the TDropFileTarget component can be extended with URL support. * It is now possible to completely customize the target auto-scroll feature. Auto scroling can now be completely customized via the OnDragEnter, OnDragOver, OnGetDropEffect and OnScroll events and the public NoScrollZone and published AutoScroll properties. * Multiple target controls per drop target component. In previous versions you had to use one drop target component per target control. With version 4, each drop target component can handle any number of target controls. * It is now possible to specify the target control at design time. A published Target property has been added to the drop target components. * Includes 20 components: - TDropFileSource and TDropFileTarget Used for drag and drop of files. Supports recycle bin and PIDLs. - TDropTextSource and TDropTextTarget Used for drag and drop of text. - TDropBMPSource and TDropBMPTarget Used for drag and drop of bitmaps. - TDropPIDLSource and TDropPIDLTarget Used for drag and drop of PIDLs in native format. - TDropURLSource and TDropURLTarget Used for drag and drop of internet shortcuts. - TDropDummyTarget Used to provide drag/drop cursor feedback for controls which aren't registered as drop targets. - TDropComboTarget (new) Swiss-army-knife target. Accepts text, files, bitmaps, meta files, URLs and file contents. - TDropMetaFileTarget (new) Target which can accept meta files and enhanced meta files. - TDropImageTarget (new) Target which can accept bitmaps, DIBs, meta files and enhanced meta files. - TDragDropHandler (new) Used to implement Drag Drop Handler shell extensions. - TDropHandler (new) Used to implement Shell Drop Handler shell extensions. - TDragDropContext (new) Used to implement Shell Context Menu Handler shell extensions. - TDataFormatAdapter (new) Extends the standard source and target components with support for extra data formats. An alternative to TDropComboTarget. - TDropEmptySource and TDropEmptyTarget (new) Target and source components which doesn't support any formats, but can be extended with TDataFormatAdapter components. * Supports 27 standard clipboard formats: Text formats: - CF_TEXT (plain text) - CF_UNICODETEXT (Unicode text) - CF_OEMTEXT (Text in the OEM characterset) - CF_LOCALE (Locale specification) - 'Rich Text Format' (RTF text) - 'CSV' (Tabular spreadsheet text) File formats: - CF_HDROP (list of file names) - CF_FILEGROUPDESCRIPTOR, CF_FILEGROUPDESCRIPTORW and CF_FILECONTENTS (list of files and their attributes and content). - 'Shell IDList Array' (PIDLs) - 'FileName' and 'FileNameW' (single filename, used for 16 bit compatibility). - 'FileNameMap' and 'FileNameMapW' (used to rename files, usually when dragging from the recycle bin) Image formats: - CF_BITMAP (Windows bitmap) - CF_DIB (Device Independant Bitmap) - CF_METAFILEPICT (Windows MetaFile) - CF_ENHMETAFILE (Enhanced Metafile) - CF_PALETTE (Bitmap palette) Internet formats: - 'UniformResourceLocator' and 'UniformResourceLocatorW' (Internet shortcut) - 'Netscape Bookmark' (Netscape bookmark/URL) - 'Netscape Image Format' (Netscape image/URL) - '+//ISBN 1-887687-00-9::versit::PDI//vCard' (V-Card) - 'HTML Format' (HTML text) - 'Internet Message (rfc822/rfc1522)' (E-mail message in RFC822 format) Misc. formats: - CF_PREFERREDDROPEFFECT and CF_PASTESUCCEEDED (mostly used by clipboard) - CF_PERFORMEDDROPEFFECT and CF_LOGICALPERFORMEDDROPEFFECT (mostly used for optimized-move) - 'InShellDragLoop' (used by Windows shell) - 'TargetCLSID' (Mostly used when dragging to recycle-bin) * New source events: - OnGetData: Fired when the target requests data. - OnSetData: Fired when the target writes data back to the source. - OnPaste: Fired when the target pastes data which the source has placed on the clipboard. - OnAfterDrop: Fired after the drag/drop operation has completed. * New target events: - OnScroll: Fires when the target component is about to perform auto-scroll on the target control. - OnAcceptFormat: Fires when the target component needs to determine if it will accept a given data format. Only surfaced in the TDropComboTarget component. * 8 new demo applications, 19 in total. ------------------------------------------- 10. TODO (may or may not be implemented): ------------------------------------------- * Async target demo (with and without IAsyncOperation support). * Scrap file demo. * Native Outlook message format. * Structured storage support (IStorage encapsulation). ------------------------------------------- 11. Licence, Copyright and Disclaimer: ------------------------------------------- The Drag and Drop Component Suite is Copyright ?1997-2001 Angus Johnson and Anders Melander. All rights reserved. The software is copyrighted as noted above. It may be freely copied, modified, and redistributed, provided that the copyright notice(s) is preserved on all copies. The Drag and Drop Component Suite is freeware and we would like it to remain so. This means that it may not be bundled with commercial libraries or sold as shareware. You are welcome to use it in commercial and shareware applications providing you do not charge for the functionality provided by the Drag and Drop Component Suite. There is no warranty or other guarantee of fitness for this software, it is provided solely "as is". You are welcome to use the source to make your own modified components, and such modified components may be distributed by you or others if you include credits to the original components, and do not charge anything for your modified components. ------------------------------------------- 12. Version 4 release history: ------------------------------------------- 16-dec-2001 * Ported to C++ Builder 4. * Released for test as v4.1 FT5. 12-dec-2001 * Fixed C++ Builder name clash between TDropComboTarget.GetMetaFile and the GetMetaFile #define in wingdi.h 1-dec-2001 * The IAsyncOperation interface is now also declared as IAsyncOperation2 and all references to IAsyncOperation has been replaced with IAsyncOperation2. This was done to work around a bug in C++ Builder. Thanks to Jonathan Arnold for all his help with getting the components to work with C++ Builder. Without Jonathan's help version 4.1 would prabably have shipped witout C++ Builder support and certainly without any C++ Builder demos. * Demo applications for C++ Builder. The C++ Builder demos were contributed by Jonathan Arnold. 27-nov-2001 * TCustomDropTarget.Droptypes property renamed to DropTypes (notice the case). Thanks to Krystian Brazulewicz for spotting this. 24-nov-2001 * The GetURLFromString function in the DragDropInternet unit has been made public due to user request. 21-nov-2001 * Modified MakeHTML function to comply with Microsoft's description of the CF_HTML clipboard format. * Added MakeTextFromHTML function to convert CF_HTML data to plain HTML. Provides the reverse functionality of MakeHTML. * Added HTML support to TTextDataFormat class and TDropTextSource and TDropTextTarget components. * Fixed C++ Builder 5 problem with IAsyncOperation. * Released for test as v4.1 FT4. 10-nov-2001 * Added NetscapeDemo demo application. Demonstrates how to receive messages dropped from Netscape. This demo was sponsored by ThoughtShare Communications Inc. * Released for test as v4.1 FT3. 23-oct-2001 * Conversion priority of TURLDataFormat has been changed to give the File Group Descritor formats priority over the Internet Shortcut format. This resolves a problem where dropping an URL on the desktop would cause the desktop to assume that an Active Desktop item was to be created instead of an Internet Shortcut. Thanks to Allen Martin for reporting this problem. By luck this modification also happens to work around a bug in Mozilla and Netscape 6; Mozilla incorrectly supplies the UniformResourceLocator clipboard format in unicode format instead of ANSI format. Thanks to Florian Kusche for reporting this problem. * Added support for TFileGroupDescritorWClipboardFormat to TURLDataFormat. * Added declaration of FD_PROGRESSUI to DragDropFormats. * Added TURLWClipboardFormat which implements the "UniformResourceLocatorW" (a.k.a. CFSTR_INETURLW) clipboard format. Basically a Unicode version of CFSTR_SHELLURL/CFSTR_INETURL. The TURLWClipboardFormat class isn't used anywhere yet but will probably be supported by TURLDataFormat (and thus TDropURLTarget/TDropURLSource) in a later release. * Added experimental Shell Drag Image support. This relies on undodumented shell32.dll functions and probably won't be fully support before v4.2 (if ever). See InitShellDragImage in DropSource.pas. Thanks to Jim Kueneman for bringning these functions to my attention. 13-oct-2001 * TCustomDropSource.Destroy and TCustomDropMultiSource.Destroy changed to call FlushClipboard instead of EmptyClipboard. This means that clipboard contents will be preserved when the source application/component is terminated. * Added clipboard support to VirtualFileStream demo. * Modified VirtualFileStream demo to work around clipboard quirk with IStream medium. * Modified TCustomSimpleClipboardFormat to disable TYMED_ISTORAGE support by default. At present TYMED_ISTORAGE is only supported for drop targets and enabling it by default in TCustomSimpleClipboardFormat.Create caused a lot of clipboard operations (e.g. copy/paste of text) to fail. Thanks to Michael J Marshall for bringing this problem to my attention. * Modified TCustomSimpleClipboardFormat to read from the the TYMED_ISTREAM medium in small (1Mb) chunks and via a global memory buffer. This has resultet in a huge performance gain (several orders of magnitude) when transferring large amounts of data via the TYMED_ISTREAM medium. 3-oct-2001 * Fixed bug in TCustomDropSource.SetImageIndex. Thanks to Maxim Abramovich for spotting this. * Added missing default property values to TCustomDropSource. Thanks to Maxim Abramovich for spotting this. * DragDrop.pas and DragDropContext.pas updated for Delphi 4. * Reimplemented utility to convert DFM form files from Delphi 5/6 test format to Delphi 4/5 binary format. * Improved unregistration of Shell Extensions. Shell extension now completely (and safely) remove their registry entries when unregistered. * Deprecated support for C++ Builder 3. * Released for test as v4.1 FT2. 25-sep-2001 * Rewritten ContextMenuHandlerShellExt demo. The demo is now actually a quite useful utility which can be used to register and unregister ActiveX controls, COM servers and type libraries. It includes the same functionality as Borland's TRegSvr utility. 20-sep-2001 * Added support for cascading menus, ownerdraw and menu bitmaps to TDropContextMenu component. * Modified TFileContentsStreamOnDemandClipboardFormat to handle invalid parameter value (FormatEtcIn.lindex) when data is copied to clipboard. This works around an apparent bug in the Windows clipboard. Thanks to Steve Moss for reporting this problem. * Modified TEnumFormatEtc class to not enumerate empty clipboard formats. Thanks to Steve Moss for this improvement. 1-sep-2001 * Introduced TCustomDropTarget.AutoRegister property. The AutoRegister property is used to control if drop target controls should be automatically unregistered and reregistered when their window handle is recreated by the VCL. If AutoRegister is True, which is the default, then automatic reregistration will be performed. This property was introduced because the hidden child control, which is used to monitor the drop target control's window handle, can have unwanted side effects on the drop target control (e.g. TToolBar). * Deprecated support for Delphi 3. 22-jun-2001 * Redesigned TTextDataFormat to handle RTF, Unicode, CSV and OEM text without conversion. Moved TTextDataFormat class to DragDropText unit. Added support for TLocaleClipboardFormat. * Surfaced new text formats as properties in TDropTextSource and TDropTextTarget. Previous versions of the Text source and target components represented all supported text formats via the Text property. In order to enable users to handle the different text formats independantly, the text source and target components now has individual properties for ANSI, OEM, Unicode and RTF text formats. The text target component can automatically synthesize some of the formats from the others (e.g. OEM text from ANSI text), but applications which previously relied on all formats being represented by the Text property will have to be modified to handle the new properties. * Added work around for problem where TToolBar as a drop target would display the invisible target proxy window. * Fixed wide string bug in WriteFilesToZeroList. Thanks to Werner Lehmann for spotting this. 15-jun-2001 * Added work-around for Outlook Express IDataObject.QueryGetData quirk. 3-jun-2001 * Ported to C++ Builder 4 and 5. * Added missing DragDropDesign.pas unit to design time packages. * First attempt at C++ Builder 3 port.... failed. * Improved handling of oversized File Group Descriptor data. * Added support for IStorage medium to TFileContentsStreamClipboardFormat. This allows the TDropComboTarget component to accept messages dropped from Microsoft Outlook. This work was sponsored by ThoughtShare Communications Inc. 23-may-2001 * Ported to Delphi 4. * First attempt at C++ Builder 5 port.... failed. 18-may-2001 * Released as version 4.0. Note: Version 4.0 was released exclusively on the Delphi 6 Companion CD. * ContextMenuDemo and DropHandlerDemo application has been partially rewritten and renamed. ContextMenuDemo is now named ContextMenuHandlerShellExt. DropHandlerDemo is now named DropHandlerShellExt. * TDropContextMenu component has been rewitten. The TDropContextMenu now implements a context menu handler shell extension. In previous releases it implemented a drag drop handler shell extension. * The DragDropHandler.pas unit which implements the TDropHandler component has been renamed to DropHandler.pas. * Added new TDragDropHandler component. The new component, which lives in the DragDropHandler unit, is used to implement drag drop handler shell extensions. * Added DragDropHandlerShellExt demo application. * Removed misc incomplete demos from kit. * Fixed minor problem in VirtualFileStream demo which caused drops from the VirtualFile demo not to transfer content correctly. 11-may-2001 * Converted all demo forms to text DFM format. This has been nescessary to maintain compatibility between all supported versions of Delphi. * Fixed a bug in GetPIDLsFromFilenames which caused drag-link of files (dtLink with TDropFileSource) not to work. * Added readme.txt files to some demo applications. * Added missing tlb and C++ Builder files to install kit. * Released as FT4. 6-may-2001 * Added missing dfm files to install kit. * Tested with Delphi 5. Fixed Delphi 5 compatibility error in main.dfm of DragDropDemo. * Removed misc compiler warnings. * The AsyncTransferTarget and OleObjectDemo demos were incomplete and has been removed from the kit for the V4.0 release. The demos will be included in a future release. * Released as FT3. 3-may-2001 * Added missing dpr and bpg files to install kit. * Updated readme.txt with regard to lack of C++ Builder demos. * Released as FT2. 29-apr-2001 * Cleaned up for release. * Released as FT1. 23-feb-2001 * Modified TCustomDropTarget.FindTarget to handle overlapping targets (e.g. different targets at the same position but on different pages of a page control or notebook). Thanks to Roger Moe for spotting this problem. 13-feb-2001 * Renamed AsyncTransfer2 demo to AsyncTransferSource. * Added AsyncTransferTarget demo. * Replaced TChart in AsyncTransfer2 demo with homegrown pie-chart-thing. * Modified all IStream based target formats to support incremental transfer. * URW533 problem has finally been fixed. The cause of the problem, which is a bug in Delphi, was found by Stefan Hoffmeister. * Fixed free notification for TDropContextmenu and TDataFormatAdapter. 27-dec-2000 * Moved TVirtualFileStreamDataFormat and TFileContentsStreamOnDemandClipboardFormat classes from VirtualFileStream demo to DragDropFormats unit. * Added TClipboardFormat.DataFormat and TClipboardFormats.DataFormat property. * Added TDropEmptySource and TDropEmptyTarget components. These are basically do-nothing components for use with TDataFormatAdapter. * Rewritten AsyncTransfer2 demo. The demo now uses TDropEmptySource, TDataFormatAdapter and TVirtualFileStreamDataFormat to transfer 10Mb of data with progress feedback. * Rewritten VirtualFileStream demo. The demo now uses TDropEmptySource, TDropEmptyTarget, TDataFormatAdapter and TVirtualFileStreamDataFormat. * Fixed memory leak in TVirtualFileStreamDataFormat. This leak only affected the old VirtualFileStream demo. * Added support for full File Descriptor attribute set to TVirtualFileStreamDataFormat. It is now possible to specify file attributes such as file size and last modified time in addition to the filename. I plan to add similar features to the other classes which uses FileDescriptors (e.g. TDropFileSource and TDropFileTarget). 21-dec-2000 * Ported to Delphi 4. * Added workaround for design bug in either Explorer or the clipboard. Explorer and the clipboard's requirements to the cursor position of an IStream object are incompatible. Explorer requires the cursor to be at the beginning of stream and the clipboard requires the cursor to be at the end of stream. 15-dec-2000 * Fixed URW533 problem. I'll leave the description of the workaround in here for now in case the problem resurfaces. 11-dec-2000 * Fixed bug in filename to PIDL conversion (GetPIDLsFromFilenames) which affected TDropFileTarget. Thanks to Poul Halgaard J鴕gensen for reporting this. 4-dec-2000 * Added THTMLDataFormat. * Fixed a a few small bugs which affected clipboard operations. * Added {$ALIGN ON} to dragdrop.inc. Apparently COM drag/drop requires some structures to be word alligned. This change fixes problems where some of the demos would suddenly stop working. * The URW533 problem has resurfaced. See the "Known problems" section below. 13-nov-2000 * TCopyPasteDataFormat has been renamed to TFeedbackDataFormat. * Added support for the Windows 2000 "TargetCLSID" format with the TTargetCLSIDClipboardFormat class and the TCustomDropSource.TargetCLSID property. * Added support for the "Logical Performed DropEffect" format with the TLogicalPerformedDropEffectClipboardFormat class. The class is used internally by TCustomDropSource. 30-oct-2000 * Added ContextMenu demo and TDropContextMenu component. Demonstrates how to customize the context menu which is displayed when a file is dragged with the right mouse button and dropped in the shell. * Added TCustomDataFormat.GetData. With the introduction of the GetData method, Data Format classes can now be used stand-alone to extract data from an IDataObject. 20-oct-2000 * Added VirtualFileStream demo. Demonstrates how to use the "File Contents" and "File Group Descritor" clipboard formats to drag and drop virtual files (files which doesn't exist physically) and transfer the data on-demand via a stream. 14-oct-2000 * Added special drop target registration of TCustomRichEdit controls. TCustomRichEdit needs special attention because it implements its own drop target handling which prevents it to work with these components. TCustomDropTarget now disables a rich edit control's built in drag/drop handling when the control is registered as a drop target. * Added work around for Windows bug where IDropTarget.DragOver is called regardless that the drop has been rejected in IDropTarget.DragEnter. 12-oct-2000 * Fixed bug that caused docking to interfere with drop targets. Thanks to G. Bradley MacDonald for bringing the problem to my attention. 30-sep-2000 * The DataFormats property has been made public in the TCustomDropMultiTarget class. * Added VirtualFile demo. Demonstrates how to use the TFileContentsClipboardFormat and TFileGroupDescritorClipboardFormat formats to drag and drop a virtual file (a file which doesn't exist physically). 28-sep-2000 * Improved drop source detection of optimized move. When an optimized move is performed by a drop target, the drop source's Execute method will now return drDropMove. Previously drCancel was returned. The OnAfterDrop event must still be used to determine if a move operation were optimized or not. * Modified TCustomDropTarget.GetPreferredDropEffect to get data from the current IDataObject instead of from the VCL global clipboard. 18-sep-2000 * Fixed bug in DropComboTarget caused by the 17-sep-2000 TStreams modification. 17-sep-2000 * Added AsyncTransfer2 demo to demonstrate use of TDropSourceThread. * Renamed TStreams class to TStreamList. 29-aug-2000 * Added TDropSourceThread. TDropSourceThread is an alternative to Windows 2000 asynchronous data transfers but also works on other platforms than Windows 2000. TDropSourceThread is based on code contributed by E. J. Molendijk. 24-aug-2000 * Added support for Windows 2000 asynchronous data transfers. Added IAsyncOperation implementation to TCustomDropSource. Added TCustomDropSource.AllowAsyncTransfer and AsyncTransfer properties. 5-aug-2000 * Added work around for URW533 compiler bug. * Fixed D4 and D5 packages and updated a few demos. Obsolete DropMultiTarget were still referenced a few places. * Documented work around for C++ Builder 5 compiler error. See the Known Problems section later in this document for more information. 2-aug-2000 * The package files provided in the kit is now design-time only packages. In previous versions, the packages could be used both at design- and run-time. The change was nescessary because the package now contains design-time code. * Added possible work around for suspected C++ Builder bug. The bug manifests itself as a "Overloadable operator expected" compile time error. See the "Known problems" section of this document. * Rewrote CustomFormat1 demo. * Added CustomFormat2 demo. * TDataDirection members has been renamed from ddGet and ddSet to ddRead and ddWrite. * All File Group Descritor and File Contents clipboard formats has been moved from the DragDropFile unit to the DragDropFormats unit. * File Contents support has been added to TTextDataFormat. The support is currently only enabled for drop sources. * Renamed TDropMultiTarget component to TDropComboTarget. Note: This will break applications which uses the TDropMultiTarget component. You can use the following technique to port application from previous releases: 1) Install the new components. 2) Repeat step 3-8 for all units which uses the TDropMultiTarget component. 3) Make a backup of the unit (both pas and dfm file) just in case... 4) Open the unit in the IDE. 5) In the .pas file, replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 6) View the form as text. 7) Replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 8) Save the unit. * Renamed a lot of demo files and directories. * Added work around for yet another bug in TStreamAdapter. * Added TCustomStringClipboardFormat as new base class for TCustomTextClipboardFormat. This changes the class hierachy a bit for classes which previously descended from TCustomTextClipboardFormat: All formats which needs zero termination now descend from TCustomTextClipboardFormat and the rest descend from TCustomStringClipboardFormat. Added TrimZeroes property. Fixed zero termination bug in TCustomTextClipboardFormat and generally improved handling of zero terminated strings. Disabled zero trim in TCustomStringClipboardFormat and enabled it in TCustomTextClipboardFormat. 23-jul-2000 * Improved handling of long file names in DropHandler demo. Added work around for ParamStr bug. * Added TDataFormatAdapter component and adapter demo. TDataFormatAdapter is used to extend the existing source and target components with additional data format support without modifying them. It can be considered an dynamic alternative to the current TDropMultiTarget component. 17-jul-2000 * TDropHandler component and DropHandler demo fully functional. 14-jul-2000 * Tested with C++ Builder 5. * Fixed sporadic integer overflow bug in DragDetectPlus function. * Added shell drop handler support with TDropHandler component. This is a work in progress and is not yet functional. 1-jul-2000 * Tested with Delphi 4. * Support for Windows 2000 inter application drag images. * TRawClipboardFormat and TRawDataFormat classes for support of arbitrary unknown clipboard formats. The classes are used internally in the TCustomDropSource.SetData method to support W2K drag images.

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