初学QT，布局有点问题，未解决...

[guiguiyiha]

#include "mainwindow.h"
#include <QtGui>

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
place_buttons();
}

void MainWindow::place_buttons()
{
led_button = new QPushButton(tr("LED"),this);
pwm_button = new QPushButton(tr("PWM"),this);
pic_button = new QPushButton(tr("PIC"),this);
adc_button = new QPushButton(tr("ADC"),this);
mp3_button = new QPushButton(tr("MP3"),this);
rtc_button = new QPushButton(tr("RTC"),this);

QVBoxLayout *leftLayout = new QVBoxLayout;
leftLayout->addWidget(led_button);
leftLayout->addWidget(pwm_button);
leftLayout->addWidget(pic_button);

QVBoxLayout *rightLayout = new QVBoxLayout;
rightLayout->addWidget(adc_button);
rightLayout->addWidget(mp3_button);
rightLayout->addWidget(rtc_button);

QHBoxLayout *mainLayout = new QHBoxLayout;
mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout);
setLayout(mainLayout);

setWindowTitle(tr("Main UI"));
}

MainWindow::~MainWindow()
{

}

为什么rtc那个button把别的button覆盖掉了呢？

[念茜]

因为他是最后一个加载的

[guiguiyiha]

我是左边3个，右边3个的。。。。。

[残剑待飞雪]

[Quote=引用楼主 guiguiyiha 的回复:]
#include "mainwindow.h"
#include <QtGui>

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
place_buttons();
}

void MainWindow::place_buttons()
{
led_butto……
[/Quote]


极不严谨的代码！！！！！！

内存泄漏呀！！！！！！！！（潜在危险极大）

new delete要对使用。
按你的代码，谁来释放局部new生成的指针呢！

[guiguiyiha]

我见书上都没有用delete，百度了下。。。。
有人说Qt本身的类会自动释放, 其他自定义类都需要手动delete
我的问题出现在什么地方？新手求教.....

[残剑待飞雪]

另外要实现你要的功能不能从QMainWindow派生，要从QWidget派生。


#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui/QMainWindow>
#include <QPushButton>
#include <QVBoxLayout>
#include <QHBoxLayout>

class MainWindow : public QWidget
{
Q_OBJECT

public:
MainWindow(QWidget *parent = 0);
~MainWindow();

void putButtons();

private:
QPushButton *led_button;
QPushButton *pwm_button;
QPushButton *pic_button;
QPushButton *adc_button;
QPushButton *mp3_button;
QPushButton *rtc_button;

QVBoxLayout *leftLayout;
QVBoxLayout *rightLayout;

QHBoxLayout *mainLayout;
};

#endif // MAINWINDOW_H



#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
: QWidget(parent)
{
putButtons();
}

MainWindow::~MainWindow()
{
delete mainLayout;
delete leftLayout;
delete rightLayout;
delete led_button;
delete pwm_button;
delete pic_button;
delete adc_button;
delete mp3_button;
delete rtc_button;
}

void MainWindow::putButtons()
{
mainLayout = new QHBoxLayout;
leftLayout = new QVBoxLayout;
rightLayout = new QVBoxLayout;

led_button = new QPushButton(tr("LED"));
pwm_button = new QPushButton(tr("PWM"));
pic_button = new QPushButton(tr("PIC"));
adc_button = new QPushButton(tr("ADC"));
mp3_button = new QPushButton(tr("MP3"));
rtc_button = new QPushButton(tr("RTC"));

leftLayout->addWidget(led_button);
leftLayout->addWidget(pwm_button);
leftLayout->addWidget(pic_button);

rightLayout->addWidget(adc_button);
rightLayout->addWidget(mp3_button);
rightLayout->addWidget(rtc_button);

mainLayout->addLayout(leftLayout);
mainLayout->addLayout(rightLayout);

this->setLayout(mainLayout);
}


这样就得到你想要的效果了

[残剑待飞雪]

如果一定要从QMainWindow派生的话，最后要这样调用

centralWidget = new QWidget();

this->setCentralWidget(centralWidget);
centralWidget->setLayout(mainLayout);

[guiguiyiha]

多谢了，有点小明白了，呵呵。。3Q

[残剑待飞雪]

兄弟，当结贴时要结贴呀

[gemfield]

《Qt的布局系统》一文即将发布在我的博客上 :)

[残剑待飞雪]

坐等楼主结贴

[guiguiyiha]

这个还要结账。。。。。。ok