本文相关源码：http://bbs.rosoo.net/forum.php?mod=viewthread&tid=1150 一、MSN拉帘式窗口制作
分三部分：1、窗口的显示；2、窗口的停留；3、窗口的消失；
如果达到这样郊果，系统中要有三个定时器，进行分别控制。定义的定时器如下：
#define ID_TIMER_POP_WINDOW 1
#define ID_TIMER_DISPALY_DELAY 2
#define ID_TIMER_CLOSE_WINDOW 3
从CWnd 继承一个窗口,当然也可以从CFrameWnd进行派生,这不是主要问题，关键是看你是怎么处理WM_PAINT,WM_MOUSEMOVE,WM_TIMER的消息。一般情况，我从OnPaint()中进行显示图片，在WM_TIMER中处理定时器消息，下面是处里定时器时用到的代码： - CMsgWnd::CMsgWnd()
- {
- ...
- SetTimer(ID_TIEMR_POP_WINDOW,20,NULL);
- ...
- }
- void CMsgWnd::OnTimer(UINT nIDEvent)
- {
- static int nHeight=0;
- int cy=GetSystemMetrics(SM_CYSCREEN);
- int cx=GetSystemMetrics(SM_CXSCREEN);
- RECT rect;
- SystemParametersInfo(SPI_GETWORKAREA,0,&rect,0);
- int y=rect.bottom-rect.top;
- int x=rect.right-rect.left;
- x=x-WIN_WIDTH;
- switch(nIDEvent)
- {
- case ID_TIMER_POP_WINDOW:
- if(nHeight<=WIN_HEIGHT)
- {
- ++nHeight;
- MoveWindow(x,y-nHeight,WIN_WIDTH,WIN_HEIGHT);
- Invalidate(FALSE);
- }
- else
- {
- KillTimer(ID_TIMER_POP_WINDOW);
- SetTimer(ID_TIMER_DISPLAY_DELAY,5000,NULL);
- }
- break;
- case ID_TIMER_CLOSE_WINDOW:
- if(nHeight>=0)
- {
- nHeight--;
- MoveWindow(x,y-nHeight,WIN_WIDTH,nHeight);
- }
- else
- {
- KillTimer(ID_TIMER_CLOSE_WINDOW);
- SendMessage(WM_CLOSE);
- }
- break;
- case ID_TIMER_DISPLAY_DELAY:
- KillTimer(ID_TIMER_DISPLAY_DELAY);
- SetTimer(ID_TIMER_CLOSE_WINDOW,20,NULL);
- break;
- }
- CWnd::OnTimer(nIDEvent);
- }
根据你设的定时器的长短来控制窗口的显示过程； - BOOL AnimateWindow(
- HWND hwnd,
- DWORD dwTime,
- DWORD dwFlags
- );
二、QQ淡出淡出显示实现
其实用到一个API函数：AnimateWindow,下面是这个函数的一些说明：
上面的函数前两个参数一看就明白，不用说了，最后一个参数dwFlags设置动画窗口的样式：
各种标志说明：
标志 说明
AW_SLIDE Uses slide animation. By default, roll animation is used.
This flag is ignored when used with the AW_CENTER flag.
AW_ACTIVATE Activates the window. Do not use this flag with AW_HIDE.
AW_BLEND Uses a fade effect. This flag can be used only if hwnd is a top-level window.
AW_HIDE Hides the window. By default, the window is shown.
AW_CENTER Makes the window appear to collapse inward if the AW_HIDE flag is used or expand outward
if the AW_HIDE flag is not used.
AW_HOR_POSITIVE Animate the window from left to right. This flag can be used with roll or slide animation. It is ignored when used with the AW_CENTER flag.
AW_HOR_NEGATIVE Animate the window from right to left. This flag can be used with roll or slide animation.
It is ignored when used with the AW_CENTER flag.
AW_VER_POSITIVE Animate the window from top to bottom. This flag can be used with roll or slide animation.
It is ignored when used with the AW_CENTER flag.
AW_VER_NEGATIVE Animate the window from bottom to top. This flag can be used with roll or slide animation.
It is ignored when used with the AW_CENTER flag.
以上内容是从MSDN中摘录的，要淡入淡出的效果的话，用到AW_BELND。 三、控制窗口显示的代码 - CMainFrame::OnCreate(…)
- {
-
- AnimateWindow(GetSafeHwnd(),1000,AW_CENTER|AW_BLEND);
-
- }
四、关闭的代码 - CMainFrame::OnClose(..)
- {
- AnimateWindow(GetSafeHwnd(),1000,AW_HIDE|AW_CENTER|AW_BLEND);
- }
其实AnimateWindow只是利用了windows本身的方法，如果您要更加有个性的窗口效果，那就得多做写些代码了，一分辛苦，一分收获吧 五、结束语 其实就MSN的提示窗口来说，如果要从使用复杂一点的背景和效果，那么还有刷新屏幕的问题，应做到无闪刷新.由于时间苍促，不足之处必然有之，同时以上代码也参考了一部分以前 VCKBASE 技术文档，在此表示感谢！ |
