davornik

Finally, made it work 🙂 ... procedure DrawColoredTxt(aBtn: TButton; aCaption: string); private FOriginalButtonProc: LONG_PTR; FButtonWndProcInstance: Pointer; procedure ButtonWndProc(var Message: TMessage); ... procedure TForm1.DrawColoredTxt(aBtn: TButton; aCaption: string); ... end; procedure TForm1.ButtonWndProc(var Message: TMessage); var PS: TPaintStruct; begin case Message.Msg of WM_PAINT: begin BeginPaint(Button2.Handle, PS); try // 1. Let Windows paint default button CallWindowProc(Pointer(FOriginalButtonProc), Button2.Handle, Message.Msg, Message.WParam, Message.LParam); // 2. Add our custom text DrawColoredTxt(Button2, 'Admin'); finally EndPaint(Button2.Handle, PS); end; end; // Forward all other messages to original handler else Message.Result := CallWindowProc(Pointer(FOriginalButtonProc), Button2.Handle, Message.Msg, Message.wParam, Message.lParam); end; end; procedure TForm1.Button1Click(Sender: TObject); begin //do OnCreate // 1. Create a method pointer instance FButtonWndProcInstance := MakeObjectInstance(ButtonWndProc); // 2. Store original proc FOriginalButtonProc := GetWindowLongPtr(Button2.Handle, GWLP_WNDPROC); // 3. Set new proc using the instance SetWindowLongPtr(Button2.Handle, GWLP_WNDPROC, LONG_PTR(FButtonWndProcInstance)); Button2.Repaint; end; procedure TForm1.Button3Click(Sender: TObject); begin //do OnDestroy if (Button2.HandleAllocated) and (FOriginalButtonProc <> 0) then SetWindowLongPtr(Button2.Handle, GWLP_WNDPROC, FOriginalButtonProc); // Clean up the method pointer if Assigned(FButtonWndProcInstance) then FreeObjectInstance(FButtonWndProcInstance); Button2.Caption := 'Admin'; Button2.Repaint; end; Literally, I can now set color and clear it 🙂

I have tried to catch OnPaint message, something like this, but no success 😞 ... procedure DrawColoredTxt(aBtn: TButton; aCaption: string); private procedure WM_PAINT(var Msg: TWMPaint); message WM_PAINT; ... procedure TForm1.DrawColoredTxt(aBtn: TButton; aCaption: string); var Canvas: TCanvas; R: TRect; begin aBtn.Caption := ''; // Clear default caption to avoid overlap Canvas := TCanvas.Create; try Canvas.Handle := GetDC(aBtn.Handle); try //Draw default button appearance SendMessage(aBtn.Handle, WM_ERASEBKGND, Canvas.Handle, 0); SendMessage(aBtn.Handle, WM_PRINTCLIENT, Canvas.Handle, PRF_CLIENT); // Draw custom text R := aBtn.ClientRect; Inc(R.Left, -15); //move to left for width of drop-down-split-btn Canvas.Brush.Style := bsClear; Canvas.Font.Color := clRed; // Change font color DrawText(Canvas.Handle, PChar(aCaption), -1, R, DT_CENTER or DT_VCENTER or DT_SINGLELINE); finally ReleaseDC(aBtn.Handle, Canvas.Handle); end; finally Canvas.Free; end; end; //OnPaint Msg procedure TForm1.WM_PAINT(var Msg: TWMPaint); begin inherited; if Assigned(Button2) then DrawColoredTxt(Button2, 'Admin'); //<- this does not work end; procedure TForm1.Button1Click(Sender: TObject); begin DrawColoredTxt(Button2, 'Admin'); //<- this works end; What am I missing?

U should use Format 🙂

What I like about Delphi and Windows is that there is always some way for a workaround 🙂 I have tried to do drawtext over text on TButton and it works partially. var aCaption: string; procedure DrawColoredTxt(aBtn: TButton); var Canvas: TCanvas; R: TRect; begin // Bckp Caption if aCaption = '' then begin aCaption:=aBtn.Caption; aBtn.Caption := ''; // Hide default caption to avoid overlap end; //DoDraw Canvas := TCanvas.Create; try Canvas.Handle := GetDC(aBtn.Handle); try R := aBtn.ClientRect; Inc(R.Left, -15); //move to left for width of dropsplitbtn Canvas.Brush.Style := bsClear; Canvas.Font.Color := clRed; // Change font color DrawText(Canvas.Handle, PChar(aCaption), -1, R, DT_CENTER or DT_VCENTER or DT_SINGLELINE); finally ReleaseDC(aBtn.Handle, Canvas.Handle); end; finally Canvas.Free; end; end; procedure TForm1.Button1Click(Sender: TObject); begin DrawColoredTxt(Button2); end; I get changed font color like this: But when I move the mouse into Button2 everything falls apart 😞 Is there any way to fix this to have properly painted text in Button2?

I have seen this example. Is there any way to just change font color without drawing a complete button?

Unfortunatelly, TButton is exactly what I need because TCustomButton.TButtonStyle.bsSplitButton State.

I am trying to use TButton, but with changed caption Font.Color. Remy suggested to use BS_OWNERDRAW and intercept WM_DRAWITEM. and here also to subclass: https://stackoverflow.com/a/23125580 I tried it to use like this but no success, font color does not change. ... type TMyButton = class(TButton) protected procedure CreateParams(var Params: TCreateParams); override; end; function ButtonSubclassProc(hWnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM; uIdSubclass: UINT_PTR; dwRefData: DWORD_PTR): LRESULT; stdcall; var btnFntClr: TMyButton; ... function ButtonSubclassProc(hWnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM; uIdSubclass: UINT_PTR; dwRefData: DWORD_PTR): LRESULT; stdcall; begin case uMsg of WM_DRAWITEM: TMyButton(dwRefData).Font.Color := clRed; WM_NCDESTROY: RemoveWindowSubclass(hWnd, @ButtonSubclassProc, uIdSubclass); end; Result := DefSubclassProc(hWnd, uMsg, wParam, lParam); end; procedure TMyButton.CreateParams(var Params: TCreateParams); begin inherited CreateParams(Params); with Params do Style := Style or BS_OWNERDRAW; end; procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction); begin btnFntClr.Free; end; procedure TForm1.FormCreate(Sender: TObject); begin btnFntClr:=TMyButton.Create(Form1); btnFntClr.Parent:=Form1; btnFntClr.Style:=TCustomButton.TButtonStyle.bsSplitButton; btnFntClr.Caption:='Options'; with btnFntClr do begin Left:=10; Top:=10; Width:=120; end; SetWindowSubclass(btnFntClr.Handle, @ButtonSubclassProc, 1, DWORD_PTR(btnFntClr)); end; How to properly change font color in TButton?

Yes, that is ok, but a solution with an "attached" TPanel (TStatusbar) is more practical. I have found in some article on SO from Remy Lebeau (thanks Remy for help) that in Designmode you must override WM_NCHitTest message to move TPanel with DBGrid! ... protected procedure WMNCHitTest(var Message: TWMNCHitTest); message WM_NCHitTest; ... procedure TEnhDBGrid.WMNCHitTest(var Message: TWMNCHitTest); begin inherited; if (csDesigning in ComponentState) then SetRecPanelPos; end; That's what I tried first, but it does not work. Since DBGrid is usually placed on TForm, RecPanel.Parent:=TWinControl(AOwner); will be better alternative, thanks.

No, Panel is below DBGrid because of that. Only thing left is to move it when DBGrid moves in Designmode. Everything else works fine, did not notice any other issue (yet ).

This would be component in simplest way possible. On Resize, TPanel moves/resizes with DBGrid. Only thing I don't know is how to make TPanel move with DBGrid in DesignMode? unit EnhDBGrid; interface uses SysUtils, Classes, DBGrids, ExtCtrls, Messages; type TEnhDBGrid = class(TDBGrid) private RecPanel: TPanel; procedure SetRecPanelPos; protected procedure UpdateScrollBar; override; procedure Resize; override; public constructor Create(AOwner: TComponent); override; end; procedure Register; implementation constructor TEnhDBGrid.Create(AOwner: TComponent); begin inherited; RecPanel:=TPanel.Create(Self); RecPanel.Parent:=TDBGrid(AOwner); RecPanel.Alignment:=taLeftJustify; RecPanel.Caption := '0/0'; RecPanel.Height := 16; end; procedure TEnhDBGrid.Resize; begin inherited; if Assigned(RecPanel) then SetRecPanelPos; end; procedure TEnhDBGrid.UpdateScrollBar; begin inherited; // to keep the expected behavior if Assigned(DataSource) and Assigned(DataSource.DataSet) and DataSource.DataSet.Active then RecPanel.Caption := DataSource.DataSet.RecNo.ToString+'/'+DataSource.DataSet.RecordCount.ToString; end; procedure TEnhDBGrid.SetRecPanelPos; begin RecPanel.Left := Left; RecPanel.Width := Width; RecPanel.Top := Top + Height; end; procedure Register; begin RegisterComponents('Data Controls', [TEnhDBGrid]); end; end.

Ok, then probably the next step is to make it like this without destructor, perhaps like this? type TDBGrid = class(Vcl.DBGrids.TDBGrid) private RecPanel: TPanel; procedure SetRecPanelPos; protected procedure UpdateScrollBar; override; procedure Resize; override; public constructor Create(AOwner: TComponent); override; end; ... procedure TDBGrid.SetRecPanelPos; begin RecPanel.Left := Self.Left; RecPanel.Width := Self.Width; RecPanel.Top := Self.Top + Self.Height end; procedure TDBGrid.Resize; begin inherited; SetRecPanelPos; end; procedure TDBGrid.UpdateScrollBar; begin //this must be updated here if Assigned(Self.DataSource.DataSet) then RecPanel.Caption := Self.DataSource.DataSet.RecNo.ToString+'/'+Self.DataSource.DataSet.RecordCount.ToString; inherited; // to keep the expected behavior end; constructor TDBGrid.Create(AOwner: TComponent); begin inherited; RecPanel:=TPanel.Create(Self); RecPanel.Parent:=TDBGrid(AOwner); RecPanel.Alignment:=taLeftJustify; RecPanel.Caption := '0/0'; RecPanel.Height := 16; end; As far of DataChange event, then I get a message like this: Method 'DataChange' not found in base class... When doing it like this in designtime I don't have Panel shown below the DBGrid. I always have to reduce height of DBGrid for height of Panel. I suppose the next step is to create it like a component and install it in Delphi? Then Panel would be shown in designtime?

I am trying to add TPanel below DBGrid to show information about RecNo/RecCount position in DBGrid. Something like in attached image. I have tried to do this: type TDBGrid = class(Vcl.DBGrids.TDBGrid) private RecPanel: TPanel; protected procedure UpdateScrollBar; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; end; ... procedure TDBGrid.UpdateScrollBar; begin //where is proper place to update this? RecPanel.Left := Self.Left; RecPanel.Width := Self.Width; RecPanel.Top := Self.Top + Self.Height; //is this best place to be updated? if Assigned(Self.DataSource.DataSet) then RecPanel.Caption := Self.DataSource.DataSet.RecNo.ToString+'/'+Self.DataSource.DataSet.RecordCount.ToString; inherited; // to keep the expected behavior end; constructor TDBGrid.Create(AOwner: TComponent); begin inherited; RecPanel:=TPanel.Create(TDBGrid(AOwner)); RecPanel.Parent:=TDBGrid(AOwner); RecPanel.Alignment:=taLeftJustify; RecPanel.Caption := '0/0'; RecPanel.Height := 16; end; destructor TDBGrid.Destroy; begin RecPanel.Free; inherited; end; Is there better place to update Panel position and record position data then UpdateScrollBar function? Does creating Panel like TPanel.Create(TDBGrid(AOwner)) has some benefits than perhaps TPanel.Create(nil)?

Hence I use CreateMessageDialog perhaps you can change Icon it self like this: var Dlg: TForm; ... begin Dlg:=CreateMessageDialog('My Message', mtConfirmation, [mbOk, mbCancel]); //change icon TImage(Dlg.FindComponent('Image')).Picture.Icon.Handle := LoadIcon( 0, IDI_QUESTION); try Result:=Dlg.ShowModal; finally Dlg.Free; end; end;

Maybe you can check if file is signed with this: uses Winapi.ImageHlp; function IsFileDigitallySigned(const FileName: string): Boolean; var FileHandle: THandle; CertHeader: TWinCertificate; begin Result := False; FileHandle := CreateFile(PChar(FileName), GENERIC_READ, FILE_SHARE_READ, nil, OPEN_EXISTING, 0, 0); if FileHandle <> INVALID_HANDLE_VALUE then try FillChar(CertHeader, SizeOf(CertHeader), 0); Result := ImageGetCertificateHeader(FileHandle, 0, CertHeader); finally CloseHandle(FileHandle); end; end;

This is great. How can you set (background or font) color of particular date in TMonthCalendar?