p,selwidth,selheight);//剪切所选区域
end;
注意:在DELPHI中使用Imgedit构件的拷贝和剪切功能时,会出现以下问题:
1、 如果把整幅图象都选中,没有任何
问题;
2、 如果选择了局部区域,则拷贝和剪切的区域会发生漂移;
3、 如果DELPHI做的是MS SQL后端数据库的客户端界面,那么在把图象内容写入数据库的图象字段中时,BDE(数据库引擎)会报错。
至于第二个问题,可这样解决:在Imgedit的onSelectionRectDrawn事件中写一段代码,把选择区域的边界值保存到四个全局变量中,在拷贝和剪切之前用先前保存的变量再进行一次选择即可。
unit scanu;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
Menus, ScanLib_TLB, ExtCtrls, AxCtrls, OleCtrls, ImgeditLib_TLB;
type
Tscanf = class(TForm)
MainMenu1: TMainMenu;
F1: TMenuItem;
N15: TMenuItem;
N1: TMenuItem;
N2: TMenuItem;
N16: TMenuItem;
N11: TMenuItem;
N5: TMenuItem;
C1: TMenuItem;
N4: TMenuItem;
E1: TMenuItem;
N6: TMenuItem;
N7: TMenuItem;
N8: TMenuItem;
N3: TMenuItem;
N10: TMenuItem;
N9: TMenuItem;
N1801: TMenuItem;
N901: TMenuItem;
N902: TMenuItem;
H1: TMenuItem;
N12: TMenuItem;
N13: TMenuItem;
ImgEdit1: TImgEdit;
Bevel1: TBevel;
ImgScan1: TImgScan;
Bevel2: TBevel;
procedure N4Click(Sender: TObject);
procedure N1Click(Sender: TObject);
procedure N2Click(Sender: TObject);
procedure C1Click(Sender: TObject);
procedure N8Click(Sender: TObject);
procedure N1801Click(Sender: TObject);
procedure N901Click(Sender: TObject);
procedure N902Click(Sender: TObject);
procedure N6Click(Sender: TObject);
procedure N7Click(Sender: TObject);
procedure ImgEdit1SelectionRectDrawn(Sender: TObject; Left, Top, Width, Height: Integer);
procedure N11Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
selleft,seltop,selwidth,selheight:integer;
end;
var
scanf: Tscanf;
implementation
{$R *.DFM}
procedure Tscanf.N4Click(Sender: TObject);
begin
imgedit1.ClearDisplay;
close;
end;
procedure Tscanf.N1Click(Sender: TObject);
begin
ImgScan1.ShowSelectScanner;
end;
procedure Tscanf.N2Click(Sender: TObject);
begin
imgedit1.zoom:=100;
if not imgscan1.ScannerAvailable then
imgscan1.OpenScanner;
imgscan1.StartScan;
imgscan1.CloseScanner;
end;
procedure Tscanf.C1Click(Sender: TObject);
begin
if imgedit1.ImageDisplayed then begin
imgedit1.ClearDisplay;
imgedit1.zoom:=100;
end;
end;
procedure Tscanf.N8Click(Sender: TObject);
begin
if (imgedit1.IsClipboardDataAvailable and imgedit1.ImageDisplayed ) then
imgedit1.ClipboardPaste(selleft,seltop);
end;
procedure Tscanf.N1801Click(Sender: TObject);
begin
if imgedit1.ImageDisplayed then
imgedit1.Flip;
end;
procedure Tscanf.N901Click(Sender: TObject);
begin
if imgedit1.ImageDisplayed then
imgedit1.RotateRight
end;
procedure Tscanf.N902Click(Sender: TObject);
begin
if imgedit1.ImageDisplayed then
imgedit1.RotateLeft;
end;
procedure Tscanf.N6Click(Sender: TObject);
begin
imgedit1.DrawSelectionRect(selleft,seltop,selwidth,selheight);
Imgedit1.ClipboardCut(selleft,seltop,selwidth,selheight);
end;
procedure Tscanf.N7Click(Sender: TObject);
begin
imgedit1.DrawSelectionRect(selleft,seltop,selwidth,selheight);
imgedit1.ClipboardCopy(selleft,seltop,selwidth,selheight);
end;
procedure Tscanf.ImgEdit1Se