article

CheckBox in DBGrid

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Submitted on: 1/1/2015 12:59:00 PM
By: Tief (from psc cd)  
Level: Intermediate
User Rating: By 9 Users
Compatibility: Delphi 5
Views: 8777
 
     This article shows you how to put a checkbox in a dbgrid. If the column is of boolean type, then a checkbox will appear. Great Look and very easy;

This article has accompanying files

 
				






// Must declare a a global variable for this form
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 2002-08-28T17:30:00Z
 2002-08-28T17:30:00Z
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 Lakeshore General Hospital
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<--[if gte mso 9]>
 
 
 
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<--[if gte mso 9]>
 
<--[if gte mso 9]>
 
 
 


// Must declare a a global variable for this form

private

 

FOriginalOptions : TDBGridOptions;

 

//************************************************

// FORM CELL CLICK

procedure TFrmFile.DBGridCellClick(Column: TColumn);

begin

if Self.DBGrid.SelectedField.DataType = ftBoolean then

SaveBoolean();

end;

 

//************************************************

// FORM SAVE BOOLEAN

procedure TFrmFile.SaveBoolean;

begin

Self.DBGrid.SelectedField.Dataset.Edit;

Self.DBGrid.SelectedField.AsBoolean := not Self.DBGrid.SelectedField.AsBoolean;

Self.DBGrid.SelectedField.Dataset.Post;

end;

 

//************************************************

// (FORM) DRAW CHECKBOX IF FIELD TYPE IS BOOLEAN

procedure TFrmFile.DBGridDrawColumnCell(Sender: TObject; const Rect: TRect;

DataCol: Integer; Column: TColumn; State: TGridDrawState);

Const

CtrlState : array[Boolean] of Integer = (DFCS_BUTTONCHECK,

DFCS_BUTTONCHECK or DFCS_CHECKED);

var

CheckBoxRectangle : TRect;

begin

if Column.Field.DataType = ftBoolean then

begin

Self.DBGrid.Canvas.FillRect(Rect);

CheckBoxRectangle.Left := Rect.Left + 2;

CheckBoxRectangle.Right := Rect.Right - 2;

CheckBoxRectangle.Top := Rect.Top + 2;

CheckBoxRectangle.Bottom := Rect.Bottom - 2;

DrawFrameControl(Self.DBGrid.Canvas.Handle,

CheckBoxRectangle,

DFC_BUTTON,

CtrlState[Column.Field.AsBoolean]);

end;

end;

 

//************************************************

// (FORM) DBGRID COL ENTER

procedure TFrmFile.DBGridColEnter(Sender: TObject);

begin

if Self.DBGrid.SelectedField.DataType = ftBoolean then

begin

Self.FOriginalOptions := Self.DBGrid.Options;

Self.DBGrid.Options := Self.DBGrid.Options - [dgEditing];

end;

end;

 

//************************************************

// (FORM) DBGRID COL EXIT

procedure TFrmFile.DBGridColExit(Sender: TObject);

begin

if Self.DBGrid.SelectedField.DataType = ftBoolean then

Self.DBGrid.Options := Self.FOriginalOptions;

end;

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