📄 c++ builder 程序设计实用教程 - 8_3 midi音乐播放器 - 张晋 - 17xie.htm
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<P class=a1><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=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::Button1Click(TObject
*Sender)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN
lang=EN-US>Form1->OpenDialog1->InitialDir="e:\\midi";</SPAN></P>
<P class=a1><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'">设置对话框缺省路径</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->OpenDialog1->Title="</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">请选择一个音乐文件名</SPAN><SPAN
lang=EN-US>:";</SPAN></P>
<P class=a1><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'">设置对话框标题</SPAN></P>
<P class=a1><SPAN
lang=EN-US>Form1->OpenDialog1->DefaultExt="mid";</SPAN></P>
<P class=a1><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'">设置对话框缺省文件名</SPAN></P>
<P class=a1><SPAN lang=EN-US>if (Form1->OpenDialog1->Execute())</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>{</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Form1->MediaPlayer1->FileName=Form1->OpenDialog1->FileName;</SPAN></P>
<P class=a1><SPAN lang=EN-US><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'">返回音乐文件名</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Form1->MediaPlayer1->Open();</SPAN></P>
<P class=a1><SPAN lang=EN-US><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'">打开多媒体播放设备</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Form1->Timer1->Enabled=true;</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>Form1->Button2->Enabled=true;</SPAN></P>
<P class=a1><SPAN lang=EN-US><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'">设置按钮有效状态</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">
</SPAN>}</SPAN></P>
<P class=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::Button3Click(TObject
*Sender)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->MediaPlayer1->Pause();</SPAN></P>
<P class=a1><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'">暂停播放或继续播放</SPAN></P>
<P class=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::Button2Click(TObject
*Sender)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->MediaPlayer1->Play();</SPAN></P>
<P class=a1><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'">播放音乐</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->Button3->Enabled=true;</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->Button4->Enabled=true;</SPAN></P>
<P class=a1><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=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::Button4Click(TObject
*Sender)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->MediaPlayer1->Stop();</SPAN></P>
<P class=a1><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'">停止播放音乐</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->Button3->Enabled=false;</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->Button4->Enabled=false;</SPAN></P>
<P class=a1><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=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::ScrollBar1Scroll(TObject
*Sender,</SPAN></P>
<P class=a1><SPAN lang=EN-US><SPAN
style="mso-spacerun: yes"> </SPAN>TScrollCode
ScrollCode, int &ScrollPos)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->MediaPlayer1->Pause();</SPAN></P>
<P class=a1><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'">暂停播放</SPAN></P>
<P class=a1><SPAN
lang=EN-US>Form1->MediaPlayer1->Position=Form1->ScrollBar1->Position;</SPAN></P>
<P class=a1><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'">拖放播放进度</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->MediaPlayer1->Play();</SPAN></P>
<P class=a1><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'">开始播放</SPAN></P>
<P class=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US>void __fastcall TForm1::Timer1Timer(TObject
*Sender)</SPAN></P>
<P class=a1><SPAN lang=EN-US>{</SPAN></P>
<P class=a1><SPAN lang=EN-US>Form1->ScrollBar1->Min=0;</SPAN></P>
<P class=a1><SPAN
lang=EN-US>Form1->ScrollBar1->Max=Form1->MediaPlayer1->Length;</SPAN></P>
<P class=a1><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'">设置滚动条参数</SPAN></P>
<P class=a1><SPAN
lang=EN-US>Form1->ScrollBar1->Position=Form1->MediaPlayer1->Position;</SPAN></P>
<P class=a1><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'">随时跟踪滚动条位置</SPAN></P>
<P class=a1><SPAN lang=EN-US>}</SPAN></P>
<P class=a1><SPAN
lang=EN-US>//-----------------------------------------------------------------------</SPAN></P>
<P class=a1><SPAN lang=EN-US><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
lang=EN-US><o:p> </o:p></SPAN></P></DIV></DIV></CENTER>
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