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📁 水木清华关于C++Builder程序的代码
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<TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;direct&nbsp;(北极他),&nbsp;信区:&nbsp;BCB&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;Re:&nbsp;CB的Form最小化时无动画的原因&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Tue&nbsp;Nov&nbsp;17&nbsp;16:23:48&nbsp;1998)&nbsp;<BR>&nbsp;<BR>【&nbsp;在&nbsp;greenlet&nbsp;(flyingbird)&nbsp;的大作中提到:&nbsp;】&nbsp;<BR>∶<I>&nbsp;我现在也搞不懂，甚至认为无法让CB的主窗口有动画的效果。&nbsp;</I><BR>∶<I>&nbsp;因为在任务条上的按钮所代表的窗口是Application窗口，而不是&nbsp;</I><BR>∶<I>&nbsp;Project所选定的Mainform。如果强行让Mainform动态地Minimize，&nbsp;</I><BR>∶<I>&nbsp;就会最小化到桌面的左下角去了。&nbsp;</I><BR>&nbsp;<BR>&nbsp;<BR>我基本上同意你的看法。Delphi&nbsp;&amp;&nbsp;BCB&nbsp;中的的主窗口都是TApplication,&nbsp;<BR>一般情况下，这个窗口居于屏幕中间，大小为0x0。底部TaskBar上的按钮&nbsp;<BR>也是TApplication窗口。应用程序的主窗口如TForm1，不是TApplicaiton&nbsp;<BR>的子窗口，但他不具有WS_EX_APPWINDOW的属性，所以不在TaskBar上产生&nbsp;<BR>Button。当最小化的时候，由于TApplication窗口是0x0的，所以如果有动&nbsp;<BR>化会很难看，所以VCL中采用SystemParametersInfo这个API使得最小化时&nbsp;<BR>TApplication窗口无动化。至于TForm1，因为底部Taskbar上的Button不是&nbsp;<BR>他的，所以VCL中直接HIDE了TForm1。这样，使得整体上看起来无动化。&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;可以在VCL的源码forms.pas中发现如下代码：&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>procedure&nbsp;TApplication.Minimize;&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;if&nbsp;not&nbsp;IsIconic(FHandle)&nbsp;then&nbsp;<BR>&nbsp;&nbsp;begin&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;NormalizeTopMosts;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;SetActiveWindow(FHandle);&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;ShowWinNoAnimate(FHandle,&nbsp;SW_MINIMIZE);&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;Assigned(FOnMinimize)&nbsp;then&nbsp;FOnMinimize(Self);&nbsp;<BR>&nbsp;&nbsp;end;&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>procedure&nbsp;TApplication.Restore;&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;if&nbsp;IsIconic(FHandle)&nbsp;then&nbsp;<BR>&nbsp;&nbsp;begin&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;SetActiveWindow(FHandle);&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;ShowWinNoAnimate(FHandle,&nbsp;SW_RESTORE);&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;{以下省略}&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>再看一下&nbsp;&nbsp;ShowWinNoAnimate:&nbsp;<BR>&nbsp;<BR>procedure&nbsp;ShowWinNoAnimate(Handle:&nbsp;HWnd;&nbsp;CmdShow:&nbsp;Integer);&nbsp;<BR>var&nbsp;<BR>&nbsp;&nbsp;Animation:&nbsp;Boolean;&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;Animation&nbsp;:=&nbsp;GetAnimation;&nbsp;<BR>&nbsp;&nbsp;if&nbsp;Animation&nbsp;then&nbsp;SetAnimation(False);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（1）&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;ShowWindow(Handle,&nbsp;CmdShow);&nbsp;<BR>&nbsp;&nbsp;if&nbsp;Animation&nbsp;then&nbsp;SetAnimation(True);&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>再看一下&nbsp;&nbsp;SetAnimation:&nbsp;<BR>&nbsp;<BR>procedure&nbsp;SetAnimation(Value:&nbsp;Boolean);&nbsp;<BR>var&nbsp;<BR>&nbsp;&nbsp;Info:&nbsp;TAnimationInfo;&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;Info.cbSize&nbsp;:=&nbsp;SizeOf(TAnimationInfo);&nbsp;<BR>&nbsp;&nbsp;BOOL(Info.iMinAnimate)&nbsp;:=&nbsp;Value;&nbsp;<BR>&nbsp;&nbsp;SystemParametersInfo(SPI_SETANIMATION,&nbsp;SizeOf(Info),&nbsp;@Info,&nbsp;0);&nbsp;<BR>&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;原来在这里。&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>让我们再看一下当TForm1要Minimize时他干什么。因为TForm是从TCustomForm&nbsp;<BR>继承过来的，他自己没有响应WM_SYSCOMMAND的方法，所以使用的是&nbsp;<BR>TCustomForm的。&nbsp;<BR>&nbsp;<BR>procedure&nbsp;TCustomForm.WMSysCommand(var&nbsp;Message:&nbsp;TWMSysCommand);&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;if&nbsp;(Message.CmdType&nbsp;and&nbsp;$FFF0&nbsp;=&nbsp;SC_MINIMIZE)&nbsp;and&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;(Application.MainForm&nbsp;=&nbsp;Self)&nbsp;then&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;Application.Minimize&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^这一句的执行结果是最小化了TApplication,隐藏了&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Form1。&nbsp;<BR>&nbsp;&nbsp;else&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;inherited;&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>你可以注释掉以上的（1）句，就会发现Tapplication最小化时有了动化，但&nbsp;<BR>很难看。&nbsp;<BR>&nbsp;&nbsp;哦有一个解决方法如下：&nbsp;<BR>&nbsp;&nbsp;首先是要用SetWindowLong将Form1变成WS_EX_APPWINDOW，但这样一来旧必须&nbsp;<BR>隐藏Application窗口。使用ShowWindow(application.handle,SW_HIDE);另外，&nbsp;<BR>我们还必须改VCL的源码。在Forms.pas中，将上面那个TCustomForm.WMSysCommand&nbsp;<BR>注释掉if，只剩下inherited,这样，Form1在最小化时旧不会击活application&nbsp;<BR>的窗口了。具体改变方法如下。&nbsp;<BR>&nbsp;&nbsp;1.拷贝一个Forms.pas到当前目录，从Project&nbsp;Source中删除缺省的Forms单元，&nbsp;<BR>然后将Forms.pas作为一个新单元加入到Project中。&nbsp;<BR>&nbsp;&nbsp;2.更改Project&nbsp;Source如下：&nbsp;<BR>&nbsp;<BR>program&nbsp;Project1;&nbsp;<BR>&nbsp;<BR>uses&nbsp;<BR>&nbsp;&nbsp;windows,&nbsp;<BR>&nbsp;&nbsp;^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;Unit1&nbsp;in&nbsp;'Unit1.pas'&nbsp;{Form1},&nbsp;<BR>&nbsp;&nbsp;Forms&nbsp;in&nbsp;'forms.pas';&nbsp;<BR>&nbsp;<BR>{$R&nbsp;*.RES}&nbsp;<BR>&nbsp;<BR>begin&nbsp;<BR>&nbsp;&nbsp;Application.Initialize;&nbsp;<BR>&nbsp;&nbsp;Application.CreateForm(TForm1,&nbsp;Form1);&nbsp;<BR>&nbsp;&nbsp;SetWindowLong(form1.handle,GWL_EXSTYLE,GetWindowLong(form1.handle,&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;GWL_EXSTYLE)&nbsp;or&nbsp;WS_EX_APPWINDOW);&nbsp;<BR>&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;form1.show;&nbsp;<BR>&nbsp;&nbsp;^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;showwindow(application.handle,sw_hide);&nbsp;<BR>&nbsp;&nbsp;^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^&nbsp;<BR>&nbsp;&nbsp;Application.Run;&nbsp;<BR>end.&nbsp;<BR>&nbsp;&nbsp;以上打了&nbsp;^&nbsp;的均为添加的代码。&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;3.将Forms.pas中的TCustomForm.WMSysCommand更改为如下：&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;大家也可以试一试不改的效果。&nbsp;<BR>&nbsp;<BR>procedure&nbsp;TCustomForm.WMSysCommand(var&nbsp;Message:&nbsp;TWMSysCommand);&nbsp;<BR>begin&nbsp;<BR>{&nbsp;&nbsp;if&nbsp;(Message.CmdType&nbsp;and&nbsp;$FFF0&nbsp;=&nbsp;SC_MINIMIZE)&nbsp;and&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;(Application.MainForm&nbsp;=&nbsp;Self)&nbsp;then&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;Application.Minimize&nbsp;<BR>&nbsp;&nbsp;else}&nbsp;&nbsp;--------------------------------&nbsp;注释掉了。&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;inherited;&nbsp;<BR>end;&nbsp;<BR>&nbsp;<BR>通过以上步骤，基本上旧可以实现动画缩放了。&nbsp;<BR>&nbsp;<BR>BTW:这种方法实现也还有一定缺陷，那为大峡有更好的方法请提出来&nbsp;<BR>&nbsp;&nbsp;供大家交流。&nbsp;<BR>&nbsp;<BR>--&nbsp;<BR>※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;bbs.net.tsinghua.edu.cn·[FROM:&nbsp;case.cs.pku.edu]&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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