这段代码可以实现。 unit Unit1;interfaceuses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ActnMan, ActnColorMaps, ExtCtrls, Menus;type TForm1 = class(TForm) MainMenu1: TMainMenu; N1: TMenuItem; mnu_Horizontal: TMenuItem; mnu_Vertical: TMenuItem; N2: TMenuItem; mnu_StartColor: TMenuItem; mnu_EndColor: TMenuItem; ColorDialog1: TColorDialog; procedure Draw(StartColor:TColor;EndColor:TColor;Direction:Integer); procedure mnu_StartColorClick(Sender: TObject); procedure mnu_VerticalClick(Sender: TObject); procedure mnu_HorizontalClick(Sender: TObject); procedure mnu_EndColorClick(Sender: TObject); procedure FormCreate(Sender: TObject); procedure FormPaint(Sender: TObject); procedure FormResize(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1; StartColor:TColor; EndColor:TColor; Direction:Integer; implementation{$R *.DFM}procedure TForm1.Draw(StartColor:TColor;EndColor:TColor;Direction:Integer); var i:Integer; Dct:TRect; c1,c2,c3:byte; begin if Direction=0 then begin for i:=0 to self.Width-1 do begin c1:=GetRValue(StartColor)+Trunc(i*(GetRValue(EndColor)-GetRValue(StartColor))/(self.Width-1)); c2:=GetGValue(StartColor)+Trunc(i*(GetGValue(EndColor)-GetGValue(StartColor))/(self.Width-1)); c3:=GetBValue(StartColor)+Trunc(i*(GetBValue(EndColor)-GetBValue(StartColor))/(self.Width-1)); Canvas.Brush.Color:=RGB(c1,c2,c3); //每次画矩形的画刷颜色 Dct:=Rect(i,0,i+1,self.Height); //每次刷绘的矩形区域 Canvas.FillRect(Dct); //填充颜色 end; end else begin for i:=0 to self.Height-1 do begin c1:=GetRValue(StartColor)+Trunc(i*(GetRValue(EndColor)-GetRValue(StartColor))/(self.Height-1)); c2:=GetGValue(StartColor)+Trunc(i*(GetGValue(EndColor)-GetGValue(StartColor))/(self.Height-1)); c3:=GetBValue(StartColor)+Trunc(i*(GetBValue(EndColor)-GetBValue(StartColor))/(self.Height-1)); Canvas.Brush.Color:=RGB(c1,c2,c3); //每次画矩形的画刷颜色 Dct:=Rect(0,i,self.Width,i+1); //每次刷绘的矩形区域 Canvas.FillRect(Dct); //填充颜色 end; end; end;procedure TForm1.mnu_StartColorClick(Sender: TObject); begin if ColorDialog1.Execute then StartColor:=ColorDialog1.Color; Draw(StartColor,EndColor,Direction); end;procedure TForm1.mnu_VerticalClick(Sender: TObject); begin Direction:=1; Draw(StartColor,EndColor,Direction); end;procedure TForm1.mnu_HorizontalClick(Sender: TObject); begin Direction:=0; Draw(StartColor,EndColor,Direction); end;procedure TForm1.mnu_EndColorClick(Sender: TObject); begin if ColorDialog1.Execute then EndColor:=ColorDialog1.Color; Draw(StartColor,EndColor,Direction); end;procedure TForm1.FormCreate(Sender: TObject); begin StartColor:=RGB(0,0,0); EndColor:=RGB(255,255,255); Direction:=0; end;procedure TForm1.FormPaint(Sender: TObject); begin Draw(StartColor,EndColor,Direction); end;procedure TForm1.FormResize(Sender: TObject); begin self.Canvas.Refresh; Draw(StartColor,EndColor,Direction); end;end.
用这个API: procedure TForm1.FormCreate(Sender: TObject); begin AnimateWindow(Self.Handle, 1000, AW_BLEND or AW_ACTIVATE); end;{ 这个函数默认使用卷帘效果,但是你可以用AW_SLIDE获得幻灯效果,用AW_CENTER获得垮塌或扩展效果,用AW_BLEND获得平滑的淡入淡出效果。 还有,你可以加上AW_ACTIVATE标志如果你的窗体正在出现,或是AW_HIDE如果你的窗体将要被隐藏,这一标志颠倒动画的方向。 当你使用卷帘和淡入淡出效果时,你可以指定效果在水平和垂直轴发生的方向,添加AW_HOR_POSITIVE和AW_HOR_NEGATIVE设置x轴,添加W_VER_POSITIVE或是AW_VER_NEGATIVE设置y轴。 当你用AW_CENTER标志时,所有这些标志都可以省略。 }
//画渐层色 procedure drawzc(form:Tform); var i:word; yy:real; r,g:Byte; begin yy:=0; r:=random(255); g:=random(255); if r<100 then r:=255; if g<100 then g:=255; for i:=0 to form.clientheight do begin form.canvas.brush.color:=rgb(r,g,255-MulDiv(i,255,form.clientheight)); form.canvas.fillrect(rect(0,round(yy),form.clientwidth,round(yy+1))); yy:=yy+1; end; end;procedure TForm1.FormPaint(Sender: TObject); begin drawzc(self); end;
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ActnMan, ActnColorMaps, ExtCtrls, Menus;type
TForm1 = class(TForm)
MainMenu1: TMainMenu;
N1: TMenuItem;
mnu_Horizontal: TMenuItem;
mnu_Vertical: TMenuItem;
N2: TMenuItem;
mnu_StartColor: TMenuItem;
mnu_EndColor: TMenuItem;
ColorDialog1: TColorDialog;
procedure Draw(StartColor:TColor;EndColor:TColor;Direction:Integer);
procedure mnu_StartColorClick(Sender: TObject);
procedure mnu_VerticalClick(Sender: TObject);
procedure mnu_HorizontalClick(Sender: TObject);
procedure mnu_EndColorClick(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormPaint(Sender: TObject);
procedure FormResize(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;
StartColor:TColor;
EndColor:TColor;
Direction:Integer;
implementation{$R *.DFM}procedure TForm1.Draw(StartColor:TColor;EndColor:TColor;Direction:Integer);
var
i:Integer;
Dct:TRect;
c1,c2,c3:byte;
begin
if Direction=0 then
begin
for i:=0 to self.Width-1 do
begin
c1:=GetRValue(StartColor)+Trunc(i*(GetRValue(EndColor)-GetRValue(StartColor))/(self.Width-1));
c2:=GetGValue(StartColor)+Trunc(i*(GetGValue(EndColor)-GetGValue(StartColor))/(self.Width-1));
c3:=GetBValue(StartColor)+Trunc(i*(GetBValue(EndColor)-GetBValue(StartColor))/(self.Width-1));
Canvas.Brush.Color:=RGB(c1,c2,c3);
//每次画矩形的画刷颜色
Dct:=Rect(i,0,i+1,self.Height);
//每次刷绘的矩形区域
Canvas.FillRect(Dct);
//填充颜色
end;
end
else
begin
for i:=0 to self.Height-1 do
begin
c1:=GetRValue(StartColor)+Trunc(i*(GetRValue(EndColor)-GetRValue(StartColor))/(self.Height-1));
c2:=GetGValue(StartColor)+Trunc(i*(GetGValue(EndColor)-GetGValue(StartColor))/(self.Height-1));
c3:=GetBValue(StartColor)+Trunc(i*(GetBValue(EndColor)-GetBValue(StartColor))/(self.Height-1));
Canvas.Brush.Color:=RGB(c1,c2,c3);
//每次画矩形的画刷颜色
Dct:=Rect(0,i,self.Width,i+1);
//每次刷绘的矩形区域
Canvas.FillRect(Dct);
//填充颜色
end;
end;
end;procedure TForm1.mnu_StartColorClick(Sender: TObject);
begin
if ColorDialog1.Execute then
StartColor:=ColorDialog1.Color;
Draw(StartColor,EndColor,Direction);
end;procedure TForm1.mnu_VerticalClick(Sender: TObject);
begin
Direction:=1;
Draw(StartColor,EndColor,Direction);
end;procedure TForm1.mnu_HorizontalClick(Sender: TObject);
begin
Direction:=0;
Draw(StartColor,EndColor,Direction);
end;procedure TForm1.mnu_EndColorClick(Sender: TObject);
begin
if ColorDialog1.Execute then
EndColor:=ColorDialog1.Color;
Draw(StartColor,EndColor,Direction);
end;procedure TForm1.FormCreate(Sender: TObject);
begin
StartColor:=RGB(0,0,0);
EndColor:=RGB(255,255,255);
Direction:=0;
end;procedure TForm1.FormPaint(Sender: TObject);
begin
Draw(StartColor,EndColor,Direction);
end;procedure TForm1.FormResize(Sender: TObject);
begin
self.Canvas.Refresh;
Draw(StartColor,EndColor,Direction);
end;end.
procedure TForm1.FormCreate(Sender: TObject);
begin
AnimateWindow(Self.Handle, 1000, AW_BLEND or AW_ACTIVATE);
end;{
这个函数默认使用卷帘效果,但是你可以用AW_SLIDE获得幻灯效果,用AW_CENTER获得垮塌或扩展效果,用AW_BLEND获得平滑的淡入淡出效果。
还有,你可以加上AW_ACTIVATE标志如果你的窗体正在出现,或是AW_HIDE如果你的窗体将要被隐藏,这一标志颠倒动画的方向。
当你使用卷帘和淡入淡出效果时,你可以指定效果在水平和垂直轴发生的方向,添加AW_HOR_POSITIVE和AW_HOR_NEGATIVE设置x轴,添加W_VER_POSITIVE或是AW_VER_NEGATIVE设置y轴。
当你用AW_CENTER标志时,所有这些标志都可以省略。
}
procedure drawzc(form:Tform);
var i:word;
yy:real;
r,g:Byte;
begin
yy:=0;
r:=random(255);
g:=random(255);
if r<100 then r:=255;
if g<100 then g:=255;
for i:=0 to form.clientheight do
begin
form.canvas.brush.color:=rgb(r,g,255-MulDiv(i,255,form.clientheight));
form.canvas.fillrect(rect(0,round(yy),form.clientwidth,round(yy+1)));
yy:=yy+1;
end;
end;procedure TForm1.FormPaint(Sender: TObject);
begin
drawzc(self);
end;