子窗口不能完全显示

[Greg_han]

做了一个 模拟“右键菜单”的窗口，菜单窗口在主窗口的边界不能完全显示。怎么完全显示呢？
先创建“菜单窗口”和“菜单的每一项” ，两个类：

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#pragma once

#include "vector"
#include "PopMenuLine.h"
// PopMenu

class PopMenu : public CWnd
{
	DECLARE_DYNAMIC(PopMenu)

public:
	PopMenu();
	virtual ~PopMenu();

	void SetPopMenuLine(PopMenuLine* pComLine);

	void CreatePopMenu(HWND hParen);

	std::vector<PopMenuLine*> m_aComLine;
protected:
	DECLARE_MESSAGE_MAP()
public:
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg void OnPaint();
private:
	
public:
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
};
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

// PopMenu.cpp : 实现文件
//

#include "stdafx.h"
#include "PopMenu.h"
#include <..\src\mfc\afximpl.h>


// PopMenu

IMPLEMENT_DYNAMIC(PopMenu, CWnd)

PopMenu::PopMenu()
{

}

PopMenu::~PopMenu()
{
}


BEGIN_MESSAGE_MAP(PopMenu, CWnd)
	ON_WM_SIZE()
	ON_WM_PAINT()
	ON_WM_MOUSEMOVE()
END_MESSAGE_MAP()

void PopMenu::SetPopMenuLine( PopMenuLine* pComLine )
{
	if(pComLine)
	{
		m_aComLine.push_back(pComLine);
	}
}

void PopMenu::CreatePopMenu(HWND hParen)
{
	CWnd* pWnd = FromHandle(hParen);
	RECT rc = {0,0,144,255};
	WNDCLASS wndclass;
	wndclass.hInstance = AfxGetInstanceHandle();
	wndclass.lpszClassName = _T("ey");
	BOOL bReg = AfxRegisterClass(&wndclass);
	//BOOL bRet = CreateEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST, _T("#32770"), _T("ey"), WS_POPUP | WS_VISIBLE, rc, pWnd, NULL, NULL);

	BOOL bRet = Create(NULL, NULL, WS_CHILD | WS_VISIBLE, rc, pWnd, 123);
	if(bRet == 0)
	{
		DWORD dwErrer = GetLastError();
		ASSERT(0);
	}
}


// PopMenu 消息处理程序

void PopMenu::OnSize(UINT nType, int cx, int cy)
{
	CWnd::OnSize(nType, cx, cy);

	if(GetSafeHwnd())
	{
		//MoveWindow()
	}
}


void PopMenu::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	// TODO: Add your message handler code here
	// Do not call CWnd::OnPaint() for painting messages

	CRect rect;
	GetClientRect(rect);
	CBrush brush(RGB(22, 222, 222));
	dc.FillRect(rect, &brush);
	int nSize = m_aComLine.size();
	for (int nL = 0; nL < nSize; ++nL)
	{
		PopMenuLine* pLine = m_aComLine[nL];
		if (pLine)
		{
			pLine->DrawLine(&dc);
		}
	}
}


void PopMenu::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default

	Invalidate();
	CWnd::OnMouseMove(nFlags, point);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#pragma once
class PopMenuLine
{
public:
	PopMenuLine(void);
	~PopMenuLine(void);

	void DrawLine(CDC*pDC);

	CString m_strText;
	CRect m_rect;
};
/////~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include "StdAfx.h"
#include "PopMenuLine.h"


PopMenuLine::PopMenuLine(void)
{
}


PopMenuLine::~PopMenuLine(void)
{
}

void PopMenuLine::DrawLine( CDC*pDC )
{
	CBrush brush(RGB(20, 200, 20));
	pDC->FillRect(m_rect, &brush);
	pDC->SetTextColor(RGB(22, 22, 22));
	pDC->DrawText(m_strText, m_rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~/
//一下主窗体调用

PopMenu * pCombox = new PopMenu;
void CMyMenuDlg::OnBnClickedOk()//点击按键后，菜单出现
{
	// TODO: 在此添加控件通知处理程序代码
	if (pCombox == NULL)
	{
		return;
	}
	const int count = 8;
	static CString strText[count] = { _T("ceshi"), _T(" 测试0"), _T("测试1"), _T("测试2"), _T("测试3"),_T("测试4"), _T("测试5"), _T("测试6") };

	int nHeight = 30;
	int nTotalHei = nHeight * pCombox->m_aComLine.size();

	CRect rcDlg;
	GetDlgItem(IDOK)->GetClientRect(rcDlg);

	CRect rect ;
	rect.left = rcDlg.left ;
	rect.top = rcDlg.top ;
	rect.right = rect.left + 100;
	rect.bottom = rect.top + nHeight * count;
	CRect rcLine = rect;
	for (int nL = 0; nL < count; ++nL)
	{
		PopMenuLine * pLine = new PopMenuLine;
		pLine->m_strText = strText[nL];

		CRect rcTemp = rcLine;
		rcTemp.top = rcTemp.top + nL * nHeight;
		rcTemp.bottom = rcTemp.top + nHeight;
		pLine->m_rect = rcTemp;
		pCombox->SetPopMenuLine(pLine);
	}

	if (!pCombox->GetSafeHwnd())
	{
		pCombox->CreatePopMenu(m_hWnd);
	}

	// ClientToScreen(rect);
	pCombox->MoveWindow(rect);
	//pCombox->SetWindowPos(this, rect.left, rect.top, rect.Width(), rect.Height(), /*SWP_NOSIZE | */SWP_NOREDRAW  /*| SWP_NOZORDER*/);
	pCombox->ShowWindow(SW_SHOW);
	pCombox->UpdateWindow();
}

[oyljerry]

应该还是你窗口位置，大小的控制代码没有对，自己调整测试一下

[Eleven]

子窗口只能在父窗口所在区域内显示，超出的部分是不会显示的。除非你创建一个Popup 或者Overlapp风格的窗口，而不是Child风格的。

[Greg_han]

怎么写啊？请VisualEleven 帮我改一下。 BOOL bRet = Create(NULL, NULL, WS_POPUP | WS_VISIBLE, rc, pWnd, 123); 程序崩溃

[BrillianceRen]

BOOL bRet = Create(NULL, NULL, WS_POPUP | WS_VISIBLE, rc, pWnd, 12300);

试试

[ITCraftsMan]

CWnd::Create函数只能创建非WS_POPUP的窗口风格的窗口。如果要创建WS_POPUP的窗口和有扩展风格的窗口，必须调用CWnd::CreateEx才能搞定。

[信阳毛尖]

引用 3 楼 Greg_han 的回复:

怎么写啊？请VisualEleven 帮我改一下。 BOOL bRet = Create(NULL, NULL, WS_POPUP | WS_VISIBLE, rc, pWnd, 123); 程序崩溃

BOOL CWnd::Create(LPCTSTR lpszClassName,
 LPCTSTR lpszWindowName, DWORD dwStyle,
 const RECT& rect,
 CWnd* pParentWnd, UINT nID,
 CCreateContext* pContext)
{
       // can't use for desktop or pop-up windows (use CreateEx instead)
       ASSERT(pParentWnd != NULL);
       ASSERT((dwStyle & WS_POPUP) == 0);

       return CreateEx(0, lpszClassName, lpszWindowName,
        dwStyle | WS_CHILD,
        rect.left, rect.top,
        rect.right - rect.left, rect.bottom - rect.top,
        pParentWnd->GetSafeHwnd(), (HMENU)nID, (LPVOID)pContext);
}

[Greg_han]

我现在 想改用 Cmenu，请问 如何Cmenu重绘 只有一列图标 系统的Cmenu 太宽了，只想支持若干个 16*16的 图标，如何重绘啊

[sumos]

http://blog.csdn.net/zhoujielunzhimi/article/details/8480959 在此基础上做如下修改： Create的时候，加上WS_POPUP样式，去掉WS_VISIBLE样式 然后调用SetWindowPos(..., SWP_SHOWNOACTIVE);显示菜单且不抢焦点 在WM_KILLFOCUS中DestroyWindow(); 在OnLButtonDown中判断点击的是第几个，然后PostMessage到窗口