fcframe.pas

一套及时通讯的原码

unit fcframe;

{$i fcIfDef.pas}
interface

uses classes, Windows, controls, stdctrls, graphics, forms, Messages, typinfo;

type
//  TfcComboButtonStyle = (cbsEllipsis, cbsDownArrow, cbsCustom);

  TfcButtonEffects = class(TPersistent)
  private
     FTransparent: boolean;
     FFlat: boolean;
     procedure SetTransparent(val: boolean);
     procedure SetFlat(val: boolean);
  protected
     Procedure Refresh; virtual;
  public
     Control: TControl;
     Button: TControl;
     constructor Create(Owner: TComponent; AButton: TControl);
     class Function Get(Control: TControl): TfcButtonEffects;
     Procedure Assign(Source: TPersistent); override;
  published
     property Transparent: boolean read FTransparent write SetTransparent default false;
     property Flat: boolean read FFlat write SetFlat default false;
  end;

  TfcEditFocusStyle = (efsFrameBox, efsFrameSunken, efsFrameRaised, efsFrameEtched,
                       efsFrameBump, efsFrameSingle);
  TfcEditFrameEnabledType = (efLeftBorder, efTopBorder, efRightBorder, efBottomBorder);
  TfcEditFrameEnabledSet = set of TfcEditFrameEnabledType;
  TfcEditFrame = class(TPersistent)
  private
    Control: TWinControl;
    FEnabled: boolean;
    FNonFocusBorders: TfcEditFrameEnabledSet;
    FFocusBorders: TfcEditFrameEnabledSet;
    FFocusStyle: TfcEditFocusStyle;
    FNonFocusStyle: TfcEditFocusStyle;
    FNonFocusTextOffsetX: integer;
    FNonFocusTextOffsetY: integer;
    FTransparent: boolean;
    FTransparentClearsBackground: boolean;
    FMouseEnterSameAsFocus:boolean;
    FAutoSizeHeightAdjust: integer;
    FNonFocusTransparentFontColor: TColor;
    FNonFocusColor: TColor;
    FNonFocusFontColor: TColor;
    procedure SetFocusBorders(val: TfcEditFrameEnabledSet);
    procedure SetNonFocusBorders(val: TfcEditFrameEnabledSet);
    procedure SetNonFocusStyle(val: TfcEditFocusStyle);
    procedure SetEnabled(val: boolean);
    procedure SetTransparent(val: boolean);
    procedure CheckParentClipping;
//    procedure AdjustEditRect;
  public
    CreateTransparent: boolean;
    function IsSingleBorderStyle(Style: TfcEditFocusStyle): boolean;
    constructor Create(Owner: TComponent);
    procedure GetEditRectForFrame(var Loc: TRect);
    procedure RefreshTransparentText(InvalidateBorders: boolean=False; UseEditRect: boolean = True);
    procedure RefreshControl;
    procedure AdjustHeight;
    Function IsFrameEffective: boolean;
    procedure GetFrameTextPosition(
       var Left, Indent: integer;
       Focused: boolean = False); virtual;
    class Function Get(Control: TControl): TfcEditFrame;

    Procedure Assign(Source: TPersistent); override;

    property TransparentClearsBackground: boolean
       read FTransparentClearsBackground write FTransparentClearsBackground default False;

  published
    property Enabled: boolean read FEnabled write SetEnabled default False;
    property Transparent: boolean read FTransparent write SetTransparent default False;
    property AutoSizeHeightAdjust: integer read FAutoSizeHeightAdjust write FAutoSizeHeightAdjust default 0;
    property FocusBorders : TfcEditFrameEnabledSet read FFocusBorders write SetFocusBorders
       default [efLeftBorder, efTopBorder, efRightBorder, efBottomBorder];
    property NonFocusBorders : TfcEditFrameEnabledSet read FNonFocusBorders write SetNonFocusBorders
             default [efBottomBorder];
    property FocusStyle: TfcEditFocusStyle read FFocusStyle write FFocusStyle default efsFrameBox;
    property NonFocusStyle: TfcEditFocusStyle read FNonFocusStyle write SetNonFocusStyle default efsFrameBox;
    property NonFocusTextOffsetX: integer read FNonFocusTextOffsetX write FNonFocusTextOffsetX default 0;
    property NonFocusTextOffsetY: integer read FNonFocusTextOffsetY write FNonFocusTextOffsetY default 0;

            // Obsolete
    property NonFocusTransparentFontColor: TColor read FNonFocusTransparentFontColor write FNonFocusTransparentFontColor default clNone;
    property NonFocusColor: TColor read FNonFocusColor write FNonFocusColor default clNone;
    property NonFocusFontColor: TColor read FNonFocusFontColor write FNonFocusFontColor default clNone;
    property MouseEnterSameAsFocus: boolean
       read FMouseEnterSameAsFocus write FMouseEnterSameAsFocus default False;
  end;


procedure fcDrawEdge(
     Control: TWinControl;
     Frame: TfcEditFrame;
     Canvas: TCanvas;
     Focused: boolean);

procedure fcInvalidateTransparentArea(control : TControl);
function fcIsTransparentParent(control : TControl): boolean;

implementation

uses fccommon, grids;

Function fcSetBorder(ctrl: TControl; val: boolean): boolean;
var PropInfo: PPropInfo;
    intval: integer;
begin
   Result:= False;
   PropInfo:= Typinfo.GetPropInfo(ctrl.ClassInfo, 'BorderStyle');
   if (PropInfo<>Nil) then begin
      if val then intval:= ord(bsSingle)
      else intval:= ord(bsNone);
      SetOrdProp(Ctrl, PropInfo, intval);
      result:= True;
   end
end;

function fcTransparent(Control: TControl): boolean;
var PropInfo: PPropInfo;
begin
   Result:= False;
   PropInfo:= Typinfo.GetPropInfo(Control.ClassInfo,'Transparent');
   if PropInfo<>Nil then result:= Boolean(GetOrdProp(Control, PropInfo));
end;

function fcIsTransparentParent(control : TControl): boolean;
var OrigStyle: longint;
    pc: TControl;
begin
   result:= false;
   pc:= control;

   // If parent is not transparent then just return
   if (fcIsClass(pc.Parent.ClassType, 'TfcPanel') or
       fcIsClass(pc.Parent.ClassType, 'TfcGroupBox')) and
      fcTransparent(pc.Parent) then
   begin
      result:= True;
      exit;
   end;
   if (pc.parent is TWinControl) and
      TWinControl(pc.parent).HandleAllocated then
   begin
      OrigStyle:= Windows.GetWindowLong(TWinControl(pc.parent).handle, GWL_EXSTYLE);
      result:= (OrigStyle and WS_EX_TRANSPARENT)<>0;
   end;
end;


constructor TfcEditFrame.Create(Owner: TComponent);
begin
   inherited Create;
   Enabled:= false;
   FNonFocusBorders:= [efBottomBorder];
   FFocusBorders:= [efLeftBorder, efTopBorder, efRightBorder, efBottomBorder];
   if Owner is TWinControl then
     control:= TWinControl(Owner)
   else
     control:= nil;
   FFocusStyle := efsFrameBox;
   FNonFocusStyle:= efsFrameBox;
   FNonFocusTextOffsetX:=0;
   FNonFocusTextOffsetX:=0;
   FNonFocusTransparentFontColor:= clNone;
   FNonFocusColor:= clNone;
   FNonFocusFontcolor:= clNone;
   FMouseEnterSameAsFocus := False;
end;

procedure TfcEditFrame.SetNonFocusBorders(val: TfcEditFrameEnabledSet);
begin
   FNonFocusBorders:= val;
   if control is TCustomEdit then
   begin
      RefreshControl;
   end
//   control.invalidate;
end;

procedure TfcEditFrame.SetFocusBorders(val: TfcEditFrameEnabledSet);
begin
   FFocusBorders:= val;
   if control is TCustomEdit then
   begin
      control.invalidate;
   end
end;

procedure TfcEditFrame.SetNonFocusStyle(val: TfcEditFocusStyle);
begin
   if val<>FNonFocusStyle then
   begin
      FNonFocusStyle:= val;
      if control is TCustomEdit then
      begin
         control.invalidate;
      end
   end
end;

procedure TfcEditFrame.SetEnabled(val: boolean);
   Function wwGetAutoSize(ctrl: TControl): boolean;
   var PropInfo: PPropInfo;
   begin
      Result:= False;
      PropInfo:= Typinfo.GetPropInfo(ctrl.ClassInfo,'AutoSize');
      if PropInfo<>Nil then result:= Boolean(GetOrdProp(Ctrl, PropInfo));
   end;

begin
   if val<>FEnabled then
   begin
      FEnabled:= val;
      if control is TCustomEdit then
      begin
         if val then fcSetBorder(control, False);
         if wwGetAutoSize(control) then AdjustHeight;
         control.invalidate;
      end
   end
end;


procedure fcDrawEdge(
     Control: TWinControl;
     Frame: TfcEditFrame;
     Canvas: TCanvas;
     Focused: boolean);
var cr: TRect;
//    StateFlags: Word;
    Flags: integer;
    focusStyle: TfcEditFocusStyle;
begin
   cr:= Control.ClientRect;
   if Focused then begin
      if not (efRightBorder in Frame.FocusBorders) and
         frame.transparent then cr.right:= cr.right-2;
      flags:= 0;
      if efLeftBorder in Frame.FocusBorders then flags:= flags + bf_left;
      if efBottomBorder in Frame.FocusBorders then flags:= flags + bf_bottom;
      if efTopBorder in Frame.FocusBorders then flags:= flags + bf_top;
      if efRightBorder in Frame.FocusBorders then flags:= flags + bf_right;
      focusStyle:= Frame.FocusStyle;

   end
   else begin
      if not (efRightBorder in Frame.NonFocusBorders) and
         frame.transparent then cr.right:= cr.right-2;
      flags:= 0;
      if efLeftBorder in Frame.NonFocusBorders then flags:= flags + bf_left;
      if efBottomBorder in Frame.NonFocusBorders then flags:= flags + bf_bottom;
      if efTopBorder in Frame.NonFocusBorders then flags:= flags + bf_top;
      if efRightBorder in Frame.NonFocusBorders then flags:= flags + bf_right;
      focusStyle:= Frame.NonFocusStyle;
   end;

      if (FocusStyle=efsFrameSingle) then
      begin
        DrawEdge(Canvas.Handle, cr, BDR_SUNKENOUTER, flags or bf_mono );
      end
      else if (FocusStyle=efsFrameBox) then
      begin
        DrawEdge(Canvas.Handle, cr, EDGE_SUNKEN, flags or bf_mono);
      end
      else if (FocusStyle=efsFrameSunken) then
      begin
        DrawEdge(Canvas.Handle, cr, EDGE_SUNKEN, flags);
      end
      else if (FocusStyle=efsFrameRaised) then
      begin
        DrawEdge(Canvas.Handle, cr, EDGE_RAISED, flags);
      end
      else if (FocusStyle=efsFrameEtched) then
      begin
        DrawEdge(Canvas.Handle, cr, EDGE_ETCHED, flags);
      end
      else if (FocusStyle=efsFrameBump) then
      begin
         DrawEdge(Canvas.Handle, cr, EDGE_BUMP, flags);
      end;

end;

procedure TfcEditFrame.CheckParentClipping;
var OldStyle:  longint;
begin
   if FTransparent and IsFrameEffective and (Control<>nil) and
      not (csDesigning in Control.ComponentState) then
   begin
      if Control.HandleAllocated then
      begin
         OldStyle:= GetWindowLong(Control.Parent.Handle, GWL_STYLE);
         if OldStyle and (NOT WS_CLIPCHILDREN)<>OldStyle then
         begin
            SendMessage(Control.Handle, CM_RECREATEWND, 0, 0);
         end
      end
   end
end;

procedure TfcEditFrame.SetTransparent(val: boolean);
begin
   if val<>FTransparent then
   begin
     CreateTransparent:= val;
     FTransparent:= val;
     CheckParentClipping;
   end;

{   if (Control<>nil) and Control.HandleAllocated and
      fcIsClass(Control.ClassType, 'TfcCustomRichEdit') and (Control<>nil) then
   begin
     SendMessage(control.handle, cm_recreatewnd, 0, 0);
   end;;
}

end;

procedure TfcEditFrame.RefreshTransparentText(InvalidateBorders: boolean=False; UseEditRect: boolean = True);
var r,tempeditrect:TRect;
    dc: HDC;
    brush: HBRUSH;
begin
   r:= Control.BoundsRect;
   if not InvalidateBorders then
   begin
     SendMessage(Control.handle,em_getrect, 0, Integer(@tempeditrect));
     if not useEditRect then begin
       InflateRect(r,-2,-2);
       if not (efLeftBorder in nonFocusBorders) then dec(r.Left,2);
     end
     else if (TEdit(Control).BorderStyle=bsNone) then
     begin
       InflateRect(r,-2,-2);
       if not (efLeftBorder in nonFocusBorders) then dec(r.Left,2);
       r.Right := r.Left+tempeditrect.Right+1;
     end
   end;

   { If imager not in background, then need to explicitly clear background }
   if fcIsTransparentParent(Control) { or True } then
      fcInvalidateTransparentArea(Control)
   else if (Control.Parent.ControlAtPos(  Point(Control.Left, Control.Top), True)=nil) then
   begin
      DC := GetDC(Control.Handle);
      brush:= 0;
      try
        brush:= CreateSolidBrush(ColorToRGB(TEdit(Control.parent).color));
        SelectObject(DC, brush);
        if not InvalidateBorders then
        begin
          InflateRect(tempEditRect, 1, 1);
          { 11/22/99 - Fix problem where far left pixels are not cleared }
          if not (efLeftBorder in nonFocusBorders) then
          begin
             dec(tempEditRect.Left,1);
             if tempEditRect.Left<0 then tempEditRect.left:= 0;
          end;
          Windows.FillRect(DC, tempEditRect, brush);
        end
        else begin
          r:= Control.ClientRect;
          Windows.FillRect(DC, r, brush);
        end;