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等级:青蜂侠 帖子:1393 积分:14038 威望:0 精华:0 注册:2010-11-12 11:08:23
关于拉幕程序的讨论和源码  发帖心情 Post By:2010-12-14 11:20:34

  修改后可以使用的程序源代码(还是不完善:还不能实现从一侧飞入的效果,轻易出错):
  unitUnit1;
  
  interface
  
  uses
  Windows,Messages,SysUtils,Classes,Graphics,Controls,Forms,Dialogs,
  StdCtrls,ExtCtrls,ComCtrls,ColorGrd,RxCombos;
  
  type
  TForm1=class(TForm)
  Button1:TButton;
  Edit1:TEdit;
  OpenDialog1:TOpenDialog;
  Button2:TButton;
  Button3:TButton;
  TrackBar1:TTrackBar;
  Panel1:TPanel;
  Panel2:TPanel;
  Panel3:TPanel;
  Label1:TLabel;
  Label2:TLabel;
  Timer1:TTimer;
  Button4:TButton;
  ColorDialog1:TColorDialog;
  FontDialog1:TFontDialog;
  Button6:TButton;
  Button7:TButton;
  ComboBox1:TComboBox;
  Panel4:TPanel;
  Edit2:TEdit;
  Edit3:TEdit;
  Label3:TLabel;
  Label4:TLabel;
  Label5:TLabel;
  Label6:TLabel;
  Edit4:TEdit;
  Edit5:TEdit;
  Button8:TButton;
  Button5:TButton;
  procedureButton1Click(Sender:TObject);
  procedureFormCreate(Sender:TObject);
  procedureTimer1Timer(Sender:TObject);
  procedureButton2Click(Sender:TObject);
  procedureButton3Click(Sender:TObject);
  procedureTrackBar1Change(Sender:TObject);
  procedureFormDestroy(Sender:TObject);
  procedureButton4Click(Sender:TObject);
  procedureButton7Click(Sender:TObject);
  procedureButton6Click(Sender:TObject);
  procedureButton8Click(Sender:TObject);
  procedureButton5Click(Sender:TObject);
  private
  procedurezShowText;
  ProcedurezBmpCreate;
  procedurezSetBmp;
  procedurezSetLineHeight;
  procedurezShowLine(sender:TObject);
  {Privatedeclarations}
  public
  {Publicdeclarations}
  end;
  
  var
  Form1:TForm1;
  
  implementation
  
  {$R*.DFM}
  const
  bWidth=200;
  var
  currline,LineHeight:integer;
  sItem:TStringList;
  bmp:TBitMap;
  bRect,R1:TRect;
  iDc:HDC;
  
  procedureTForm1.Button1Click(Sender:TObject);
  begin
  OpenDialog1.Execute;
  Edit1.Text:=OpenDialog1.FileName;
  end;
  
  procedureTForm1.FormCreate(Sender:TObject);
  begin
  Form1.WindowState:=wsMaximized;
  Panel1.Top:=80;
  Panel1.Left:=96;
  Panel1.Height:=385;
  Panel1.Width:=433;
  Timer1.Enabled:=False;
  Label2.Caption:='100';
  iDC:=GetDc(Panel1.handle);
  Currline:=0;
  end;
  
  procedureTForm1.zShowLine(sender:TObject);
  begin
  zShowText;
  end;
  
  procedureTForm1.Timer1Timer(Sender:TObject);
  begin
  zShowLine(self);//显示字符串
  //bitblt转移矩形图(目标句柄,LSx,y,宽,高,源句柄,LSx,y,光栅运算符)
  BitBlt(iDc,0,0,Panel1.Width,Panel1.Height,
  Bmp.Canvas.Handle,0,Currline,srcCopy);
  Inc(Currline,1);
  ifCurrline>=bRect.Bottom-panel1.Height 100then//循环条件?
  begin
  Timer1.Enabled:=False;
  Currline:=0;
  end;
  end;
  
  
  procedureTForm1.zShowText;
  var
  i:integer;
  ss:string;
  ReadFile:TextFile;
  begin
  AssignFile(ReadFile,Edit1.Text);
  Reset(ReadFile);
  i:=1;
  sItem:=TStringList.Create;
  withsItemdo
  whilenoteof(ReadFile)do
  begin
  Readln(ReadFile,ss);
  add(ss);
  i:=i 1;
  end;
  CloseFile(ReadFile);
  zBmpCreate;
  sItem.Free;//释放串
  end;
  
  procedureTForm1.zBmpCreate;//创建图片
  var
  i,y:integer;//y
  begin
  ifbmp<>nilthenbmp.free;
  bmp:=TBitMap.Create;
  zSetBmp;
  R1.Right:=bRect.Right;
  R1.Bottom:=bRect.Bottom;
  y:=Panel1.Height-100;
  fori:=0tosItem.Count-1do//从0到行数循环显示图片
  begin
  R1.Top:=y;
  R1.Bottom:=R1.Top LineHeight;
  ifCombobox1.Text='中间对齐'then//显示图片
  DrawText(Bmp.Canvas.Handle,pChar(sItem[i]),-1,R1,Dt_CenterorDt_Top)
  else
  ifCombobox1.Text='左对齐'then
  DrawText(Bmp.Canvas.Handle,pChar(sItem[i]),-1,R1,Dt_LeftorDt_Top)
  else
  ifCombobox1.Text='右对齐'then
  DrawText(Bmp.Canvas.Handle,pChar(sItem[i]),-1,R1,Dt_RightorDt_Top)
  else
  DrawText(Bmp.Canvas.Handle,pChar(sItem[i]),-1,R1,Dt_CenterorDt_Top);
  Inc(y,LineHeight);
  end;
  end;
  
  
  
  
  
  procedureTForm1.zSetBmp;
  begin
  zSetLineHeight;
  withbRectdo//Rect矩形坐标(左上x,左下y,右上x,右下y)
  begin
  Top:=0;
  Left:=0;
  Right:=Panel1.Width;
  Bottom:=LineHeight*sItem.Count Height;//行高*行数 form高度
  end;
  withBmpdo
  begin
  Height:=bRect.Bottom 100;//图片高度
  Width:=bRect.Right;
  withCanvasdo//canvas画布
  begin
  Font:=FontDialog1.Font;
  //Font:=self.Font;//form所设置的字体
  Brush.Color:=ColorDialog1.Color;
  FillRect(bRect);
  Brush.Style:=bsClear;
  end;
  end;
  end;
  
  
  
  
  
  procedureTForm1.zSetLineHeight;
  {设置行间隔}
  var
  Metrics:TTextMetric;//设置字体API
  begin
  GetTextMetrics(iDc,Metrics);
  LineHeight:=Metrics.tmHeight Metrics.tmInternalLeading-Bmp.Canvas.Font.Height;
  end;
  
  
  
  procedureTForm1.Button2Click(Sender:TObject);
  begin
  ifEdit1.Text='thenShowMessage('请输入文件地址')
  else
  begin
  ifButton2.Caption='开始'thenButton2.Caption:='暂停'
  elseButton2.Caption:='开始';
  Timer1.Enabled:=notTimer1.Enabled;
  end;
  end;
  
  procedureTForm1.Button3Click(Sender:TObject);
  begin
  timer1.Enabled:=false;
  Currline:=0;
  Button2.Click;
  Button2.Caption:='暂停';
  end;
  
  procedureTForm1.TrackBar1Change(Sender:TObject);
  begin
  Timer1.Interval:=TrackBar1.Position*5;
  Label2.Caption:=inttostr(Timer1.Interval);
  end;
  
  procedureTForm1.FormDestroy(Sender:TObject);
  begin
  ifBmp<>nilthenBmp.Free;
  end;
  
  procedureTForm1.Button4Click(Sender:TObject);
  begin
  close;
  end;
  
  
  procedureTForm1.Button7Click(Sender:TObject);
  begin
  FontDialog1.Execute;
  end;
  
  procedureTForm1.Button6Click(Sender:TObject);
  begin
  ColorDialog1.Execute;
  end;
  
  procedureTForm1.Button8Click(Sender:TObject);
  begin
  if((strtoint(Edit2.Text)>=600)or(strtoint(Edit3.text)>=500)or((strtoint(Edit5.Text)>=553)or(strtoint(Edit4.Text)>=630)))
  thenshowmessage('范围超界')
  else
  begin
  Panel1.Top:=strtoint(Edit2.text);
  Panel1.Left:=strtoint(Edit3.text);
  Panel1.Width:=strtoint(Edit4.text);
  Panel1.Height:=strtoint(Edit5.text);
  end;
  
  end;
  
  
  
  procedureTForm1.Button5Click(Sender:TObject);
  begin
  Panel1.Top:=0;
  Panel1.Left:=0;
  Panel1.Width:=Panel3.Width;
  Panel1.Height:=Panel3.Height;
  end;
  
  end.
  


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