📄 c++ builder 程序设计实用教程 - 8_1_5 enabledbuttons属性、visiblebuttons属性 - 张晋 - 17xie.htm
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src="C++ Builder 程序设计实用教程 - 8_1_5 EnabledButtons属性、VisibleButtons属性 - 张晋 - 17xie.files/9e6aa0a527.jpg"
width=335 v:shapes="_x0000_i1025"></SPAN></P>
<P class=MsoCaption><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN
lang=EN-US>8-11<SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">添加组件后的窗体</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果在程序的设计过程中，用鼠标的左键双击窗体的空白处，在弹出的代码窗口中添加下列代码：</SPAN></P>
<P class=a0><SPAN lang=EN-US>void __<SPAN class=SpellE>fastcall</SPAN>
TForm1::FormCreate(<SPAN class=SpellE>TObject</SPAN> *Sender)</SPAN></P>
<P class=a0><SPAN lang=EN-US>{</SPAN></P>
<P class=a0><SPAN lang=EN-US>MediaPlayer1-><SPAN
class=SpellE>FileName</SPAN>= "d:\\FileCopy.avi"; </SPAN></P>
<P class=a0><SPAN lang=EN-US>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指定播放文件</SPAN></P>
<P class=a0><SPAN lang=EN-US>MediaPlayer1-><SPAN
class=SpellE>VisibleButtons.Clear</SPAN>();</SPAN></P>
<P class=a0><SPAN
lang=EN-US>Form1->MediaPlayer1->EnabledButtons<<btPlay<<btPause<<btStop<<btStep<<btStep;</SPAN></P>
<P class=a0><SPAN lang=EN-US>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置按钮有效状态</SPAN></P>
<P class=a0><SPAN
lang=EN-US>Form1->MediaPlayer1->VisibleButtons<<btPlay<<btPause<<btStop<<btStep<<btStep<<btBack;</SPAN></P>
<P class=a0><SPAN lang=EN-US>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置按钮可见状态</SPAN></P>
<P class=a0><SPAN lang=EN-US>MediaPlayer1->Open();</SPAN></P>
<P class=a0><SPAN lang=EN-US>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开播放设备</SPAN></P>
<P class=a0><SPAN lang=EN-US>}</SPAN></P>
<P class=a0><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">完成以上工作后，按键盘上的功能键</SPAN><SPAN
lang=EN-US>F9</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">运行程序。</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">结果如图</SPAN><SPAN
lang=EN-US>8-12</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示。</SPAN></P>
<P class=a><SPAN lang=EN-US><IMG height=212
src="C++ Builder 程序设计实用教程 - 8_1_5 EnabledButtons属性、VisibleButtons属性 - 张晋 - 17xie.files/7fa28f46f6.jpg"
width=297 v:shapes="_x0000_i1026"></SPAN></P>
<P class=MsoCaption><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN
lang=EN-US>8-12<SPAN style="mso-spacerun: yes"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序运行结果</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">当执行程序时，首先装入窗体，然后执行窗体</SPAN><SPAN
class=SpellE><SPAN lang=EN-US>FormCreate</SPAN></SPAN><SPAN
lang=EN-US>()</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">事件中的代码，即通过语句</SPAN></P>
<P class=a0><SPAN
lang=EN-US>Form1->MediaPlayer1->EnabledButtons<<btPlay<<btPause<<btStop<<btStep<<btStep;</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来设置组件中各个按钮的有效状态；通过语句</SPAN></P>
<P class=a0><SPAN
lang=EN-US>Form1->MediaPlayer1->VisibleButtons<<btPlay<<btPause<<btStop<<btStep<<btStep<<btBack;</SPAN></P>
<P class=MsoNormalIndent><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来设置组件中各个按钮的可见状态。</SPAN></P>
<P class=MsoNormal><SPAN
lang=EN-US><o:p> </o:p></SPAN></P></DIV></DIV></CENTER>
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