mpgplay.cpp

C++ Builder 6 编程实例教程-北京希望电子出版社出版

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "MpgPlay.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TMpgForm *MpgForm;
//---------------------------------------------------------------------------
__fastcall TMpgForm::TMpgForm(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TMpgForm::FormCreate(TObject *Sender)
{
    BitBtn1->Enabled=true;
    BitBtn2->Enabled=false;
    Timer1->Enabled=false;
    //设置控件有效状态

}
//---------------------------------------------------------------------------
void __fastcall TMpgForm::BitBtn1Click(TObject *Sender)
{
    OpenDialog1->Title="请选择一个影碟文件：";
    //设置对话框标题
    OpenDialog1->Filter="电影文件(*.avi)|*.avi|电影文件(*.dat)|*.dat";
    //设置文件过滤器
    OpenDialog1->Execute();
    //显示对话框
    if(OpenDialog1->FileName!="")
    {
        MediaPlayer1->Display=Panel1;
        //设置视频文件的显示范围在显示区内
        MediaPlayer1->FileName=OpenDialog1->FileName;
        //设置文件的路径和文件名
        MediaPlayer1->Open();
        //打开多媒体设备
       Timer1->Enabled=true;
       BitBtn2->Enabled=true;
        //设置按钮有效状态
            ScrollBar1->Min=0;
    ScrollBar1->Max=MediaPlayer1->Length;
    }

}
//---------------------------------------------------------------------------
void __fastcall TMpgForm::BitBtn2Click(TObject *Sender)
{
    MediaPlayer1->Stop();
   //停止播放

    MpgForm->Close();
}
//---------------------------------------------------------------------------
void __fastcall TMpgForm::ScrollBar1Scroll(TObject *Sender,
      TScrollCode ScrollCode, int &ScrollPos)
{
    MediaPlayer1->Position=ScrollBar1->Position;
    //改变播放进度
    Timer1->Enabled=true;
    MediaPlayer1->Play();
}
//---------------------------------------------------------------------------
void __fastcall TMpgForm::Timer1Timer(TObject *Sender)
{
    ScrollBar1->Enabled=true;
    ScrollBar1->Position=MediaPlayer1->Position;
    //显示播放进度

}
//---------------------------------------------------------------------------