鼠标拖动虚影效果

 

PS:

1.form2是主窗体,form1是子窗体,我当时安装的是XE8,新建第一个窗体就是叫form2。

2.事件处理用到了控件(ApplicationEvents1)。

3.源代码下载地址:“https://download.csdn.net/download/zhujianqiangqq/7551317”。

 

 1 unit Unit2;
 2 
 3 interface
 4 
 5 uses
 6   Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
 7   Vcl.Controls, Vcl.Forms, Vcl.Dialogs, unit1, Vcl.StdCtrls, Vcl.ExtCtrls,
 8   Vcl.AppEvnts;
 9 
10 type
11   TForm2 = class(TForm)
12     ApplicationEvents1: TApplicationEvents;
13     Label1: TLabel;
14     procedure MYHideMessage(var Msg: tagMSG; var Handled: Boolean);
15   private
16     { Private declarations }
17 
18   public
19     { Public declarations }
20 
21   end;
22 
23 var
24   Form2: TForm2;
25 implementation
26 
27 {$R *.dfm}
28 
29 procedure TForm2.MYHideMessage(var Msg: tagMSG; var Handled: Boolean);
30 var
31   pt:TPoint;
32   bit: TBitmap;
33 begin
34   case Msg.message of
35     WM_LBUTTONDOWN:  //鼠标左键按下显示虚窗体
36     begin
37       //复制一个主窗体的图片
38       bit := TBitmap.Create;
39       bit.Width := Width;
40       bit.Height := Height;
41       BitBlt(bit.Canvas.Handle, 0, 0, Width, Height, GetWindowDC(Handle), 0, 0, SRCCOPY);
42       //虚窗体加载图片
43       Form1.Image1.Picture.Assign(bit);
44       //我这里为了方便大家看代码没有用TRY,大家写时注意了
45       bit.Free;
46       //设置虚窗体的大小
47       Form1.Height:=Form2.Height;
48       Form1.Width:=Form2.Width;
49       Form1.Image1.Align:=alClient;
50       Form1.BorderStyle:=bsNone;
51       //显示虚窗体
52       Form1.Show;
53       //设置透明度
54       Form1.AlphaBlend:=True;
55       Form1.AlphaBlendValue:=100;
56     end;
57     WM_MOUSEMOVE: //鼠标移动虚窗体根着移动
58     begin
59       //取出鼠标的位置
60       GetCursorPos(pt);
61       Caption:='X坐标: '+inttostr(pt.X)+'   Y坐标:  '+inttostr(pt.Y);
62       //设置虚窗体的位置
63       Form1.Top:=pt.Y;
64       Form1.Left:=pt.X;
65     end;
66     WM_LBUTTONUP: //鼠标左键跳起虚窗体隐藏
67     begin
68       Form1.Hide;
69     end;
70   end;
71 end;
72 
73 end.
View Code

 

posted on 2016-09-05 17:45  疯狂delphi  阅读(764)  评论(0编辑  收藏  举报

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