怎样让用户在运行期实现设计期那样的界面设计方式
编号：QA004526
建立日期: 2002年1月20日 最后修改日期：2002年1月20日
所属类别：
dyonghua:
操作系统：WIN98
编程工具：DELPHI5.0
问题：问题一:
怎样让用户在运行期实现设计期那样的界面设计方式。用户可以自由移动控件在窗体中的位置并且可以保存下它的设计位置供系统在下次启动时使用？
问题二：
有没有什么好的方法在运行期动态添加各种VCL组件，由用户完成系统功能的自定义？
回答:
object frmMain: TfrmMain
Left = 335
Top = 199
BorderStyle = bsSingle
Caption = 'Form1'
ClientHeight = 183
ClientWidth = 320
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -10
Font.Name = 'MS Sans Serif'
Font.Style = []
OldCreateOrder = False
Position = poScreenCenter
Scaled = False
PixelsPerInch = 96
TextHeight = 13
object GroupBox1: TGroupBox
Left = 16
Top = 8
Width = 73
Height = 81
Caption = 'GroupBox1'
TabOrder = 0
OnMouseDown = ControlMouseDown
OnMouseMove = ControlMouseMove
OnMouseUp = ControlMouseUp
end
object CheckBox1: TCheckBox
Left = 40
Top = 120
Width = 97
Height = 17
Caption = 'CheckBox1'
TabOrder = 1
OnMouseDown = ControlMouseDown
OnMouseMove = ControlMouseMove
OnMouseUp = ControlMouseUp
end
object Button1: TButton
Left = 102
Top = 16
Width = 75
Height = 25
Caption = 'Button1'
TabOrder = 2
OnMouseDown = ControlMouseDown
OnMouseMove = ControlMouseMove
OnMouseUp = ControlMouseUp
end
object Edit1: TEdit
Left = 136
Top = 64
Width = 121
Height = 21
TabOrder = 3
Text = 'Edit1'
end
end
********************************************************
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Registry, ExtCtrls, ComCtrls;
type
TfrmMain = class(TForm)
GroupBox1: TGroupBox;
CheckBox1: TCheckBox;
Image1: TImage;
Button1: TButton;
procedure ControlMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure ControlMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
procedure ControlMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private
downX, downY: Integer;
dragging: Boolean;
{ Private-Deklarationen }
public
{ Public-Deklarationen }
end;
var
frmMain: TfrmMain;
implementation
{$R *.DFM}
type
TMoveCracker = class(TControl);
procedure TfrmMain.ControlMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
downX := X;
downY := Y;
dragging := TRue;
TMoveCracker(Sender).MouseCapture := True;
end;
procedure TfrmMain.ControlMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
if dragging then
with Sender as TControl do
begin
Left := X - downX + Left;
Top := Y - downY + Top;
end;
end;
procedure TfrmMain.ControlMouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if dragging then
begin
dragging := False;
TMoveCracker(Sender).MouseCapture := False;
end;
end;
end.
定义三个方法ControlMouseUp，ControlMouseMove，ControlMouseDown，分别对应桌面所有控件的OnMouseDown，OnMouseMove，OnMouseUp方法即可。
2. 关于动态控件生成和控件属性、方法赋值的问题。
这是标准的Delphi RTTI调用，Delphi Inspector自己也是通过RTTI调用的，没有什么好简单的吧，本来就很简单。
此问题由Dragon P.C.回答。
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