一 右键菜单
1 右键菜单
当在窗口点击鼠标右键时，弹出的菜单。
2 右键菜单的使用
2.1 创建菜单
CreatePopupMenu
2.2 菜单增加
AppendMenu
2.3 菜单的显示、
BOOL TrackPopupMenu(
HMENU hMenu, //显示的菜单句柄
UINT uFlags, //显示的方式
int x, //菜单的X屏幕坐标
int y, //菜单的Y屏幕坐标
int nReserved, //保留,必须为0
HWND hWnd, //处理菜单命令的窗口句柄
CONST RECT *prcRect ); //忽略
2.4 菜单的命令处理
WM_COMMAND
2.5 使用右键菜单的位置
2.5.1 WM_RBUTTONUP 消息
在WM_RBUTTONUP中,添加菜单的创建及显示,
右键消息坐标,转换成屏幕坐标使用.
ClientToScreen.
2.5.2 WM_CONTEXTMENU 消息
用于显示右键的菜单的消息.
WPARAM - 右键抬起时对应窗口句柄
LPARAM - 右键抬起时鼠标的屏幕坐标位置
LOWORD(lParam) - X屏幕坐标
HIWORD(lParam) - Y屏幕坐标
2.5.3 WM_RBUTTONUP和WM_CONTEXTMENU对比
1) 坐标系不同, WM_RBUTTONUP客户区坐标,WM_CONTEXTMENU屏幕坐标
2) 先有WM_RBUTTONUP消息,后有WM_CONTEXTMENU消息
/* File : winPopMenu.cpp
* Auth : sjin
* Date : 20140706
* Mail : 413977243@qq.com
*/
#include <Windows.h>
#include <stdio.h>
HINSTANCE g_hInst = NULL;
void OnRButtonUp( HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam )
{ // 创建弹出式菜单
HMENU hPopMenu = CreatePopupMenu( );
// 增加菜单项
AppendMenu( hPopMenu, MF_STRING, 1001, "测试1");
AppendMenu( hPopMenu, MF_SEPARATOR, 0, NULL );
AppendMenu( hPopMenu, MF_STRING, 1002, "退出");
// 获取菜单位置
POINT point = { 0 };
point.x = LOWORD( lParam );
point.y = HIWORD( lParam );
ClientToScreen( hWnd, &point );
// 显示菜单
TrackPopupMenu( hPopMenu, TPM_LEFTALIGN,
point.x, point.y, 0, hWnd, NULL );
}
void OnContextMenu( HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam )
{ // 创建弹出式菜单
HMENU hPopMenu = CreatePopupMenu( );
// 增加菜单项
AppendMenu( hPopMenu, MF_STRING, 1001, "测试2");
AppendMenu( hPopMenu, MF_SEPARATOR, 0, NULL );
AppendMenu( hPopMenu, MF_STRING, 1002, "退出");
// 坐标获取
int nX = LOWORD( lParam );
int nY = HIWORD( lParam );
// 显示菜单
TrackPopupMenu( hPopMenu, TPM_LEFTALIGN,
nX, nY, 0, hWnd, NULL );
// 删除菜单
DestroyMenu( hPopMenu );
}
void OnCommand( HWND hWnd, UINT nMsg,
WPARAM wParam, LPARAM lParam )
{
int nCmdID = LOWORD( wParam );
switch( nCmdID )
{
case 1001:
MessageBox( NULL, "Hello Popmenu",
"PopMenu", MB_OK );
break;
case 1002:
PostQuitMessage( 0 );
break;
}
}
LRESULT CALLBACK WndProc( HWND hWnd,
UINT nMsg,
WPARAM wParam,
LPARAM lParam )
{
switch( nMsg )
{
case WM_RBUTTONUP:
//OnRButtonUp( hWnd, nMsg, wParam, lParam );
break;
case WM_CONTEXTMENU:
OnContextMenu( hWnd, nMsg, wParam, lParam );
break;
case WM_COMMAND:
OnCommand( hWnd, nMsg, wParam, lParam );
break;
case WM_DESTROY:
PostQuitMessage( 0 );
return 0;
}
return DefWindowProc( hWnd, nMsg,
wParam, lParam );
}
BOOL RegisterWnd( LPSTR pszClassName )
{
WNDCLASSEX wce = { 0 };
wce.cbSize = sizeof( wce );
wce.cbClsExtra = 0;
wce.cbWndExtra = 0;
wce.hbrBackground = HBRUSH(COLOR_WINDOW);
wce.hCursor = NULL;
wce.hIcon = NULL;
wce.hIconSm = NULL;
wce.hInstance = g_hInst;
wce.lpfnWndProc = WndProc;
wce.lpszClassName = pszClassName;
wce.lpszMenuName = NULL;
wce.style = CS_HREDRAW|CS_VREDRAW;
ATOM nAtom = RegisterClassEx( &wce );
if( 0 == nAtom )
{
return FALSE;
}
return TRUE;
}
HWND CreateWnd( LPSTR pszClassName )
{
HWND hWnd = CreateWindowEx( 0,
pszClassName, "MyWnd",
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, NULL, NULL, g_hInst,
NULL );
return hWnd;
}
void DisplayWnd( HWND hWnd )
{
ShowWindow( hWnd, SW_SHOW );
UpdateWindow( hWnd );
}
void Message( )
{
MSG msg = { 0 };
while( GetMessage( &msg, NULL, 0, 0 ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
g_hInst = hInstance;
RegisterWnd( "MYWND" );
HWND hWnd = CreateWnd( "MYWND" );
DisplayWnd( hWnd );
Message( );
return 0;
}