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CHEMPLOT.ZIP
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PlotZoom.pas
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Pascal/Delphi Source File
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2001-06-01
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4KB
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145 lines
unit PlotZoom;
{-----------------------------------------------------------------------------
The contents of this file are subject to the Q Public License
("QPL"); you may not use this file except in compliance
with the QPL. You may obtain a copy of the QPL from
the file QPL.html in this distribution, derived from:
http://www.trolltech.com/products/download/freelicense/license.html
The QPL prohibits development of proprietary software.
There is a Professional Version of this software available for this.
Contact sales@chemware.hypermart.net for more information.
Software distributed under the QPL is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the QPL for
the specific language governing rights and limitations under the QPL.
The Original Code is: Zoom.pas, released 12 September 2000.
The Initial Developer of the Original Code is Mat Ballard.
Portions created by Mat Ballard are Copyright (C) 1999 Mat Ballard.
Portions created by Microsoft are Copyright (C) 1998, 1999 Microsoft Corp.
All Rights Reserved.
Contributor(s): Mat Ballard e-mail: mat.ballard@chemware.hypermart.net.
Last Modified: 02/25/2000
Current Version: 2.00
You may retrieve the latest version of this file from:
http://Chemware.hypermart.net/
This work was created with the Project JEDI VCL guidelines:
http://www.delphi-jedi.org/Jedi:VCLVCL
in mind.
Purpose:
To facilitate user manipluation of the plot scale.
Known Issues:
-----------------------------------------------------------------------------}
interface
uses
Classes, SysUtils,
{$IFDEF WINDOWS}
WinTypes, WinProcs, Buttons, Controls, Forms, Graphics, StdCtrls,
{$ENDIF}
{$IFDEF WIN32}
Windows,
Buttons, Controls, Forms, Graphics, StdCtrls,
{$ENDIF}
{$IFDEF LINUX}
QButtons, QControls, QForms, QGraphics, QStdCtrls,
{$ENDIF}
Misc, Nedit;
type
TZoomForm = class(TForm)
BitBtn1: TBitBtn;
BitBtn2: TBitBtn;
ZoomBitBtn: TBitBtn;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Label4: TLabel;
XMinNEdit: TNEdit;
XMaxNEdit: TNEdit;
YMinNEdit: TNEdit;
YMaxNEdit: TNEdit;
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
public
end;
var
ZoomForm: TZoomForm;
implementation
{$R *.dfm}
{------------------------------------------------------------------------------
Procedure: TZoomForm.FormCreate
Description: standard FormCreate procedure
Author: Mat Ballard
Date created: 04/25/2000
Date modified: 04/25/2000 by Mat Ballard
Purpose: sets the position
Known Issues:
------------------------------------------------------------------------------}
procedure TZoomForm.FormCreate(Sender: TObject);
begin
SetDialogGeometry(Self, ZoomBitBtn, Label1.Left);
end;
{------------------------------------------------------------------------------
Procedure: TZoomForm.FormClose
Description: standard FormClose procedure
Author: Mat Ballard
Date created: 04/25/2000
Date modified: 04/25/2000 by Mat Ballard
Purpose: checks for valid user input
Known Issues:
------------------------------------------------------------------------------}
procedure TZoomForm.FormClose(Sender: TObject; var Action: TCloseAction);
var
Test, TestMax: Single;
begin
{Check that floating point values are valid:}
Action := caHide;
try
XMinNEdit.SetFocus;
Test := StrToFloat(XMinNEdit.Text);
XMaxNEdit.SetFocus;
TestMax := StrToFloat(XMaxNEdit.Text);
if (TestMax < Test) then
ERangeError.CreateFmt('The Min (%g) MUST be less than the Max (%g)',
[Test, TestMax]);
YMinNEdit.SetFocus;
Test := StrToFloat(YMinNEdit.Text);
YMaxNEdit.SetFocus;
TestMax := StrToFloat(YMaxNEdit.Text);
if (TestMax < Test) then
ERangeError.CreateFmt('The Min (%g) MUST be less than the Max (%g)',
[Test, TestMax]);
{We do the above and below the squelch the warning messages.}
Tag := Trunc(Test);
except
{Prevent closure:}
Action := caNone;
end;
end;
end.