{ /*************************************************************************** forms.pp -------- Component Library Code Initial Revision : Sun Mar 28 23:15:32 CST 1999 Revised : Sat Jul 15 1999 ***************************************************************************/ ***************************************************************************** * * * This file is part of the Lazarus Component Library (LCL) * * * * See the file COPYING.LCL, included in this distribution, * * for details about the copyright. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * * ***************************************************************************** } unit Forms; {$mode objfpc}{$H+} interface {$ifdef Trace} {$ASSERTIONS ON} {$endif} uses Classes, Controls, VCLGlobals, SysUtils, LCLType, LCLProc, LCLLinux, InterfaceBase, GraphType, Graphics, Menus, LMessages, CustomTimer, ActnList, ClipBrd; type TProcedure = procedure; TProcedureOfObject = procedure of object; // form position policies: TPosition = ( poDesigned, // bounds from the designer poDefault, // LCL decision (normally window manager) poDefaultPosOnly, // designed size and LCL position poDefaultSizeOnly, // designed position and LCL size poScreenCenter, // center form on screen poDesktopCenter, // center form on desktop poMainFormCenter, // center form on main form poOwnerFormCenter // center form on owner form ); TWindowState = (wsNormal, wsMinimized, wsMaximized); TCloseAction = (caNone, caHide, caFree, caMinimize); TScrollingWinControl = class; { TControlScrollBar } TScrollBarKind = (sbHorizontal, sbVertical); TScrollBarInc = 1..32768; TScrollBarStyle = (ssRegular, ssFlat, ssHotTrack); TControlScrollBar = class(TPersistent) private FControl: TScrollingWinControl; FAutoRange : Longint; FKind: TScrollBarKind; FIncrement: TScrollBarInc; FPage: TScrollBarInc; FPosition: Integer; FRange: Integer; FSmooth : Boolean; FVisible: Boolean; function GetSize: integer; procedure SetPosition(Value: Integer); procedure SetRange(Value: Integer); procedure SetSize(const AValue: integer); procedure SetSmooth(Value: Boolean); procedure SetVisible(Value: Boolean); protected procedure AutoCalcRange; Procedure UpdateScrollBar; procedure ScrollHandler(var Message: TLMScroll); public constructor Create(AControl: TScrollingWinControl; AKind: TScrollBarKind); procedure Assign(Source: TPersistent); override; function IsScrollBarVisible: Boolean; function ScrollPos: Integer; property Kind: TScrollBarKind read FKind; published property Increment: TScrollBarInc read FIncrement write FIncrement default 8; property Page: TScrollBarInc read FPage write FPage default 80; property Smooth : Boolean read FSmooth write SetSmooth;// default True property Position: Integer read FPosition write SetPosition default 0; property Range: Integer read FRange write SetRange default 0; property Size: integer read GetSize write SetSize stored false; property Visible: Boolean read FVisible write SetVisible;// default True; end; { TScrollingWinControl } TScrollingWinControl = class(TWinControl) private FHorzScrollBar : TControlScrollBar; FVertScrollBar : TControlScrollBar; FAutoScroll : Boolean; FOnPaint: TNotifyEvent; FCanvas : TControlCanvas; IsUpdating : Boolean; procedure SetAutoScroll(Value: Boolean); procedure SetHorzScrollBar(Value: TControlScrollBar); procedure SetVertScrollBar(Value: TControlScrollBar); Function StoreScrollBars : Boolean; Protected procedure AlignControls(AControl: TControl; var ARect: TRect); override; procedure CreateWnd; override; function GetClientScrollOffset: TPoint; override; Procedure WMEraseBkgnd(var Message: TLMEraseBkgnd); message LM_ERASEBKGND; procedure WMPaint(var message: TLMPaint); message LM_PAINT; procedure WMSize(var Message: TLMSize); message LM_Size; Procedure WMHScroll(var Message : TLMHScroll); message LM_HScroll; Procedure WMVScroll(var Message : TLMVScroll); message LM_VScroll; procedure ScrollBy(DeltaX, DeltaY: Integer); property OnPaint: TNotifyEvent read FOnPaint write FOnPaint; Public Constructor Create(AOwner : TComponent); Override; Destructor Destroy; Override; procedure Paint; dynamic; procedure PaintWindow(dc : Hdc); override; Procedure UpdateScrollbars; property Canvas: TControlCanvas read FCanvas; published property AutoScroll: Boolean read FAutoScroll write SetAutoScroll; property HorzScrollBar: TControlScrollBar read FHorzScrollBar write SetHorzScrollBar stored StoreScrollBars; property VertScrollBar: TControlScrollBar read FVertScrollBar write SetVertScrollBar stored StoreScrollBars; end; { TScrollBox } TScrollBox = class(TScrollingWinControl) public constructor Create(AOwner: TComponent); override; published property Align; property Anchors; property AutoSize default True; //property AutoScroll; //property BiDiMode; //property BorderStyle: TBorderStyle // read FBorderStyle write SetBorderStyle default bsSingle; property Constraints; //property DockSite; property DragCursor; property DragKind; property DragMode; property Enabled; property Color nodefault; property Ctl3D; property Font; //property ParentBiDiMode; property ParentColor; property ParentCtl3D; property ParentFont; property ParentShowHint; property PopupMenu; property ShowHint; property TabOrder; property TabStop; property Visible; //property OnCanResize; property OnClick; property OnConstrainedResize; property OnDblClick; //property OnDockDrop; //property OnDockOver; property OnDragDrop; property OnDragOver; //property OnEndDock; property OnEndDrag; property OnEnter; property OnExit; //property OnGetSiteInfo; property OnMouseDown; property OnMouseMove; property OnMouseUp; property OnMouseWheel; property OnMouseWheelDown; property OnMouseWheelUp; property OnResize; //property OnStartDock; property OnStartDrag; //property OnUnDock; property OnPaint; end; TIDesigner = class; { TCustomForm } TCloseEvent = procedure(Sender: TObject; var Action: TCloseAction) of object; TCloseQueryEvent = procedure(Sender : TObject; var CanClose : boolean) of object; TFormStateType = ( fsCreating, // initializing (form streaming) fsVisible, // form should be shown fsShowing, fsModal, // form is modal fsCreatedMDIChild ); TFormState = set of TFormStateType; TModalResult = low(Integer)..high(Integer); TCustomForm = class(TScrollingWinControl) private FActive : Boolean; FActiveControl : TWinControl; FBorderStyle : TFormBorderStyle; FDesigner : TIDesigner; FFormStyle : TFormStyle; FFormState: TFormState; FFormUpdateCount: integer; FIcon: TIcon; FKeyPreview: Boolean; FMenu : TMainMenu; FModalResult : TModalResult; FOnActivate: TNotifyEvent; FOnCreate: TNotifyEvent; FOnDeactivate : TNotifyEvent; FOnDestroy: TNotifyEvent; FOnHide: TNotifyEvent; FOnShow: TNotifyEvent; FOnClose: TCloseEvent; FOnCloseQuery : TCloseQueryEvent; FPosition : TPosition; FWindowState : TWindowState; FDummyTextHeight : Longint; procedure ClientWndProc(var Message: TLMessage); procedure CloseModal; procedure DoCreate; procedure DoDestroy; procedure SetActive(AValue: Boolean); procedure SetActiveControl(AWinControl: TWinControl); procedure SetBorderStyle(Value : TFORMBorderStyle); procedure SetDesigner(Value : TIDesigner); procedure SetMenu(Value : TMainMenu); procedure SetFormStyle(Value : TFormStyle); procedure SetIcon(AValue: TIcon); procedure SetPosition(Value : TPosition); procedure SetVisible(Value: boolean); procedure SetWindowFocus; procedure SetWindowState(Value : TWIndowState); function IsForm : Boolean; procedure IconChanged(Sender: TObject); function IsIconStored: Boolean; { events } procedure WMActivate(var Message : TLMActivate); message LM_ACTIVATE; procedure WMDeactivate(var Message : TLMActivate); message LM_DEACTIVATE; procedure WMPaint(var message: TLMPaint); message LM_PAINT; procedure WMSize(var message: TLMSize); message LM_Size; procedure WMShowWindow(var message: TLMShowWindow); message LM_SHOWWINDOW; procedure WMCloseQuery(var message: TLMessage); message LM_CLOSEQUERY; protected procedure Activate; dynamic; procedure ActiveChanged; dynamic; function CloseQuery : boolean; virtual; procedure CreateParams(var Params: TCreateParams); override; procedure CreateWnd; override; procedure Loaded; override; procedure BeginFormUpdate; procedure Deactivate;dynamic; procedure DoClose(var Action: TCloseAction); dynamic; procedure DoHide; dynamic; procedure DoShow; dynamic; procedure EndFormUpdate; function FormUpdating: boolean; procedure GetChildren(Proc: TGetChildProc; Root: TComponent); override; // Delphi needed GetClientRect for win32 specific things, LCL not // Function GetClientRect : TRect ; Override; procedure Notification(AComponent: TComponent; Operation : TOperation);override; procedure PaintWindow(dc : Hdc); override; procedure RequestAlign; override; procedure UpdateShowing; override; procedure UpdateWindowState; procedure ValidateRename(AComponent: TComponent; const CurName, NewName: string);override; Procedure SetZOrder(Topmost: Boolean); override; procedure WndProc(var TheMessage : TLMessage); override; public // properties property ActiveControl : TWinControl read FActiveControl write SetActiveControl; property Icon: TIcon read FIcon write SetIcon stored IsIconStored; property OnActivate: TNotifyEvent read FOnActivate write FOnActivate; property OnClose: TCloseEvent read FOnClose write FOnClose stored IsForm; property OnCloseQuery : TCloseQueryEvent read FOnCloseQuery write FOnCloseQuery stored IsForm; property OnCreate: TNotifyEvent read FOnCreate write FOnCreate; property OnDeactivate: TNotifyEvent read FOnDeactivate write FOnDeactivate; property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy; property OnHide: TNotifyEvent read FOnHide write FOnHide; property OnShow: TNotifyEvent read FOnShow write FOnShow; property OnResize stored IsForm; property Position : TPosition read FPosition write SetPosition default poDesigned; property TextHeight : Longint read FDummyTextHeight write FDummyTextHeight stored False; public constructor Create(AOwner: TComponent); override; constructor CreateNew(AOwner: TComponent; Num : Integer); virtual; procedure BeforeDestruction; override; function GetIconHandle: HICON; destructor Destroy; override; procedure Close; procedure Release; procedure Hide; function WantChildKey(Child : TControl; var MEssage : TLMessage): Boolean; virtual; procedure SetFocus; override; function SetFocusedControl(Control : TWinControl): Boolean ; Virtual; procedure FocusControl(WinControl : TWinControl); function ShowModal : Integer; property Active : Boolean read FActive; property BorderStyle : TFormBorderStyle read FBorderStyle write SetBorderStyle default bsSizeable; //property Canvas: TControlCanvas read GetCanvas; property Caption stored IsForm; property Designer : TIDesigner read FDesigner write SetDesigner; property FormStyle : TFormStyle read FFormStyle write SetFormStyle default fsNormal; property FormState : TFormState read FFormState; property KeyPreview: Boolean read FKeyPreview write FKeyPreview; property Menu : TMainMenu read FMenu write SetMenu; property ModalResult : TModalResult read FModalResult write FModalResult; property Visible write SetVisible default False; property WindowState: TWindowState read FWindowState write SetWindowState default wsNormal; end; { TForm } TForm = class(TCustomForm) private FClientHandle: HWND; FDummyPPI : longint; public property ClientHandle: HWND read FClientHandle; published property PixelsPerInch : Longint read FDummyPPI write FDummyPPI stored False; property ActiveControl; property Align; property AutoSize; property BorderStyle; property Caption; property Color; property ClientHeight; property ClientWidth; property Constraints; property Enabled; property Font; property FormStyle; property Icon; property Menu; property ParentFont; property PopupMenu; property Position; property ShowHint; property TextHeight; property Visible; property WindowState; property OnActivate; property OnCreate; property OnClose; property OnCloseQuery; property OnDeactivate; property OnDestroy; property OnKeyPress; property OnKeyUp; property OnKeyDown; property OnMouseMove; property OnMouseUp; property OnMouseDown; property OnShow; property OnHide; property OnPaint; property OnResize; end; TFormClass = class of TForm; { THintWindow } THintWindow = class(TCustomForm) private FActivating: Boolean; FAutoHide : Boolean; FAutoHideTimer : TComponent; FHideInterval : Integer; procedure SetAutoHide(Value : Boolean); procedure AutoHideHint(Sender : TObject); procedure SetHideInterval(Value : Integer); protected procedure Paint; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; procedure ActivateHint(ARect: TRect; const AHint: String); virtual; function CalcHintRect(MaxWidth: Integer; const AHint: String; AData: Pointer): TRect; virtual; property AutoHide : Boolean read FAutoHide write SetAutoHide; property HideInterval : Integer read FHideInterval write SetHideInterval; end; THintWindowClass = class of THintWindow; { TScreen } PCursorRec = ^TCursorRec; TCursorRec = record Next: PCursorRec; Index: Integer; Handle: HCURSOR; end; TScreen = class(TComponent) private FActiveControl: TWinControl; FActiveCustomForm: TCustomForm; FActiveForm: TForm; FCursor: TCursor; FCursorCount: integer; FCursorList: PCursorRec; FCustomForms: TList; FDefaultCursor: HCURSOR; FFocusedForm: TCustomForm; FFonts : TStrings; FFormList: TList; FHintFont : TFont; FLastActiveControl: TWinControl; FLastActiveCustomForm: TCustomForm; FOnActiveControlChange: TNotifyEvent; FOnActiveFormChange: TNotifyEvent; FPixelsPerInch : integer; FSaveFocusedList: TList; procedure CreateCursors; procedure DeleteCursor(Index: Integer); procedure DestroyCursors; function GetCursors(Index: Integer): HCURSOR; function GetCustomFormCount: Integer; function GetCustomForms(Index: Integer): TCustomForm; function GetFonts : TStrings; function GetFormCount: Integer; function GetForms(IIndex: Integer): TForm; function GetHeight : Integer; function GetWidth : Integer; procedure AddForm(AForm: TCustomForm); procedure RemoveForm(AForm: TCustomForm); procedure SetCursor(const AValue: TCursor); procedure SetCursors(Index: Integer; const AValue: HCURSOR); procedure UpdateLastActive; public constructor Create(AOwner : TComponent); override; destructor Destroy; Override; public property ActiveControl: TWinControl read FActiveControl; property ActiveCustomForm: TCustomForm read FActiveCustomForm; property ActiveForm: TForm read FActiveForm; property Cursor: TCursor read FCursor write SetCursor; property Cursors[Index: Integer]: HCURSOR read GetCursors write SetCursors; property CustomFormCount: Integer read GetCustomFormCount; property CustomForms[Index: Integer]: TCustomForm read GetCustomForms; property FormCount: Integer read GetFormCount; property Forms[Index: Integer]: TForm read GetForms; property Fonts : TStrings read GetFonts; property PixelsPerInch : integer read FPixelsPerInch; property HintFont : TFont read FHintFont; property Height : Integer read Getheight; property Width : Integer read GetWidth; property OnActiveControlChange: TNotifyEvent read FOnActiveControlChange write FOnActiveControlChange; property OnActiveFormChange: TNotifyEvent read FOnActiveFormChange write FOnActiveFormChange; end; { TApplication } TExceptionEvent = procedure (Sender: TObject; E: Exception) of object; TIdleEvent = procedure (Sender: TObject; var Done: Boolean) of object; TOnUserInputEvent = procedure(Sender: TObject; Msg: Cardinal) of object; // application hint stuff PHintInfo = ^THintInfo; THintInfo = record HintControl: TControl; HintWindowClass: THintWindowClass; HintPos: TPoint; HintMaxWidth: Integer; HintColor: TColor; CursorRect: TRect; CursorPos: TPoint; ReshowTimeout: Integer; HideTimeout: Integer; HintStr: string; HintData: Pointer; end; TCMHintShow = record Msg: Cardinal; Reserved: Integer; HintInfo: PHintInfo; Result: Integer; end; TCMHintShowPause = record Msg: Cardinal; WasActive: Integer; Pause: PInteger; Result: Integer; end; TAppHintTimerType = (ahtNone, ahtShowHint, ahtHideHint, ahtReshowHint); TShowHintEvent = procedure (var HintStr: string; var CanShow: Boolean; var HintInfo: THintInfo) of object; THintInfoAtMouse = record MousePos: TPoint; Control: TControl; ControlHasHint: boolean; end; TApplicationFlag = (AppWaiting, AppIdleEndSent); TApplicationFlags = set of TApplicationFlag; TApplication = class(TComponent) private FFlag: TApplicationFlags; FHandle : THandle; FHint: string; FHintColor: TColor; FHintControl: TControl; FHintHidePause: Integer; FHintPause: Integer; FHintShortCuts: Boolean; FHintShortPause: Integer; FHintTimer: TCustomTimer; FHintTimerType: TAppHintTimerType; FHintWindow: THintWindow; FIcon: TIcon; FList: TList; FMainForm : TForm; FMouseControl: TControl; FOnException: TExceptionEvent; FOnHint: TNotifyEvent; FOnIdle: TIdleEvent; FOnIdleHandler: TMethodList; FOnIdleEnd: TNotifyEvent; FOnIdleEndHandler: TMethodList; FOnShowHint: TShowHintEvent; FOnUserInput: TOnUserInputEvent; FOnUserInputHandler: TMethodList; FShowHint: Boolean; FTerminate : Boolean; FTitle : String; procedure DoOnIdleEnd; function GetExename: String; function GetIconHandle: HICON; function GetTitle: string; procedure IconChanged(Sender: TObject); procedure Idle; procedure MouseIdle(const CurrentControl: TControl); procedure SetHint(const AValue: string); procedure SetHintColor(const AValue: TColor); procedure SetIcon(AValue: TIcon); procedure SetShowHint(const AValue: Boolean); procedure StopHintTimer; procedure WndProc(var AMessage : TLMessage); protected procedure NotifyIdleHandler; procedure NotifyIdleEndHandler; function IsHintMsg(var Msg: TMsg): Boolean; procedure DoOnMouseMove; virtual; procedure ShowHintWindow(const Info: THintInfoAtMouse); procedure StartHintTimer(Interval: integer; TimerType: TAppHintTimerType); procedure OnHintTimer(Sender: TObject); procedure UpdateVisible; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; procedure ControlDestroyed(AControl: TControl); Procedure BringToFront; procedure CreateForm(InstanceClass: TComponentClass; var Reference); function HandleAllocated: boolean; procedure HandleException(Sender: TObject); procedure HandleMessage; function IsWaiting: boolean; procedure CancelHint; procedure HideHint; procedure HintMouseMessage(Control : TControl; var AMessage: TLMessage); property Icon: TIcon read FIcon write SetIcon; procedure Initialize; function MessageBox(Text, Caption : PChar; Flags : Longint) : Integer; procedure Notification(AComponent : TComponent; Operation : TOperation); override; Procedure ProcessMessages; procedure Run; procedure ShowException(E: Exception); procedure Terminate; procedure NotifyUserInputHandler(Msg: Cardinal); procedure AddOnIdleHandler(AnOnIdleHandler: TNotifyEvent); procedure RemoveOnIdleHandler(AnOnIdleHandler: TNotifyEvent); procedure AddOnIdleEndHandler(AnOnIdleEndHandler: TNotifyEvent); procedure RemoveOnIdleEndHandler(AnOnIdleEndHandler: TNotifyEvent); procedure AddOnUserInputHandler(AnOnUserInputHandler: TOnUserInputEvent); procedure RemoveOnUserInputHandler(AnOnUserInputHandler: TOnUserInputEvent); procedure DoBeforeMouseMessage(CurMouseControl: TControl); public property Exename: String read GetExeName; property Handle: THandle read FHandle; property Hint: string read FHint write SetHint; property HintColor: TColor read FHintColor write SetHintColor; property HintHidePause: Integer read FHintHidePause write FHintHidePause; property HintPause: Integer read FHintPause write FHintPause; property HintShortCuts: Boolean read FHintShortCuts write FHintShortCuts; property HintShortPause: Integer read FHintShortPause write FHintShortPause; property MainForm: TForm read FMainForm; property Terminated: Boolean read FTerminate; property OnException: TExceptionEvent read FOnException write FOnException; property OnIdle: TIdleEvent read FOnIdle write FOnIdle; property OnIdleEnd: TNotifyEvent read FOnIdleEnd write FOnIdleEnd; property OnHint: TNotifyEvent read FOnHint write FOnHint; property OnShowHint: TShowHintEvent read FOnShowHint write FOnShowHint; property OnUserInput: TOnUserInputEvent read FOnUserInput write FOnUserInput; property ShowHint: Boolean read FShowHint write SetShowHint; property Title: String read GetTitle write FTitle; end; { TIDesigner } TIDesigner = class(TObject) public function IsDesignMsg(Sender: TControl; var Message: TLMessage): Boolean; virtual; abstract; procedure Modified; virtual; abstract; procedure Notification(AComponent: TComponent; Operation: TOperation); virtual; abstract; procedure PaintGrid; virtual; abstract; procedure ValidateRename(AComponent: TComponent; const CurName, NewName: string); virtual; abstract; function GetShiftState: TShiftState; virtual; abstract; Procedure SelectOnlyThisComponent(AComponent:TComponent); virtual; abstract; end; function KeysToShiftState(Keys:Word): TShiftState; function KeyDataToShiftState(KeyData: Longint): TShiftState; type TFocusState = type Pointer; function SaveFocusState: TFocusState; procedure RestoreFocusState(FocusState: TFocusState); function GetParentForm(Control:TControl): TCustomForm; function FindRootDesigner(AComponent: TComponent): TIDesigner; function IsAccel(VK : Word; const Str : ShortString): Boolean; procedure NotifyApplicationUserInput(Msg: Cardinal); function InitResourceComponent(Instance: TComponent; RootAncestor: TClass):Boolean; function GetShortHint(const Hint: string): string; function GetLongHint(const Hint: string): string; var Application : TApplication; Screen : TScreen; ExceptionObject : TExceptObject; HintWindowClass: THintWindowClass; type TMessageBoxFunction = function(Text, Caption : PChar; Flags : Longint) : Integer; var MessageBoxFunction: TMessageBoxFunction; procedure FreeInterfaceObject; implementation uses LResources, Math; var FocusMessages: Boolean; FocusCount: Integer; {------------------------------------------------------------------------------ procedure NotifyApplicationUserInput; ------------------------------------------------------------------------------} procedure NotifyApplicationUserInput(Msg: Cardinal); begin if Application<>nil then Application.NotifyUserInputHandler(Msg); end; //------------------------------------------------------------------------------ procedure ExceptionOccurred(Sender : TObject; Addr,Frame : Pointer); var Mess : String; Begin Writeln('[FORMS.PP] ExceptionOccurred Procedure'); Mess := 'Error occurred in '+Sender.ClassName+' at '#13#10'Address '+HexStr(Cardinal(Addr),8)+#13#10'Frame '+HexStr(Cardinal(Frame),8); if Application<>nil then Application.MessageBox(PChar(Mess),'Exception',mb_IconError+mb_Ok) else writeln(Mess); end; //------------------------------------------------------------------------------ // The focus state is just the focus count for now. To save having to allocate // anything, I just map the Integer to the TFocusState. function SaveFocusState: TFocusState; begin Result := TFocusState(FocusCount); end; procedure RestoreFocusState(FocusState: TFocusState); begin FocusCount := Integer(FocusState); end; function SendFocusMessage(Window: HWnd; Msg: Word): Boolean; var Count: Integer; begin Count := FocusCount; SendMessage(Window, Msg, 0, 0); Result := (FocusCount = Count); end; //------------------------------------------------------------------------------ function KeysToShiftState(Keys:Word): TShiftState; begin Result := []; if Keys and MK_Shift <> 0 then Include(Result,ssShift); if Keys and MK_Control <> 0 then Include(Result,ssCtrl); if Keys and MK_LButton <> 0 then Include(Result,ssLeft); if Keys and MK_RButton <> 0 then Include(Result,ssRight); if Keys and MK_MButton <> 0 then Include(Result,ssMiddle); if GetKeyState(VK_MENU) < 0 then Include(Result, ssAlt); end; function KeyDataToShiftState(KeyData: Longint): TShiftState; begin Result := []; if GetKeyState(VK_SHIFT) < 0 then Include(Result, ssShift); if GetKeyState(VK_CONTROL) < 0 then Include(Result, ssCtrl); if KeyData and $20000000 <> 0 then Include(Result, ssAlt); end; //------------------------------------------------------------------------------ function GetParentForm(Control:TControl): TCustomForm; begin while Control.Parent <> nil do Control := Control.Parent; if Control is TCustomForm then Result := TCustomForm(Control) else Result := nil; end; //------------------------------------------------------------------------------ function IsAccel(VK : Word; const Str : ShortString): Boolean; begin Result := true; end; //============================================================================== function InitResourceComponent(Instance: TComponent; RootAncestor: TClass):Boolean; function InitComponent(ClassType: TClass): Boolean; procedure ApplyVisible; var i: integer; AControl: TControl; begin // The LCL has as default Visible=false. But for Delphi compatbility // loading control defaults to true. if Instance is TControl then for i:=0 to Instance.ComponentCount-1 do begin AControl:=TControl(Instance.Components[i]); if (AControl is TControl) then begin if (not (csVisibleSetInLoading in AControl.ControlState)) then AControl.Visible:=true else AControl.ControlState:= AControl.ControlState-[csVisibleSetInLoading]; end; end; end; var CompResource:TLResource; MemStream: TMemoryStream; begin //writeln('[InitComponent] ',ClassType.Classname,' ',Instance<>nil); Result:=false; if (ClassType=TComponent) or (ClassType=RootAncestor) then exit; if Assigned(ClassType.ClassParent) then Result:=InitComponent(ClassType.ClassParent); CompResource:=LazarusResources.Find(ClassType.ClassName); if (CompResource = nil) or (CompResource.Value='') then exit; //writeln('[InitComponent] CompResource found for ',ClassType.Classname); if (ClassType.InheritsFrom(TForm)) and (CompResource.ValueType<>'FORMDATA') then exit; MemStream:=TMemoryStream.Create; try MemStream.Write(CompResource.Value[1],length(CompResource.Value)); MemStream.Position:=0; writeln('Form Stream "',ClassType.ClassName,'" Signature=',copy(CompResource.Value,1,4)); try Instance:=MemStream.ReadComponent(Instance); except on E: Exception do begin writeln('Form streaming "',ClassType.ClassName,'" error: ',E.Message); exit; end; end; finally ApplyVisible; MemStream.Free; end; Result:=true; end; // InitResourceComponent //var LocalizedLoading: Boolean; begin //GlobalNameSpace.BeginWrite; // hold lock across all ancestor loads (performance) try //LocalizedLoading:=(Instance.ComponentState * [csInline,csLoading])=[]; //if LocalizedLoading then BeginGloabelLoading; // push new loadlist onto stack try Result:=InitComponent(Instance.ClassType); //if LocalizedLoading then NotifyGloablLoading; // call Loaded finally //if LocalizedLoading then EndGloablLoading; // pop loadlist off stack end; finally //GlobalNameSpace.EndWrite; end; end; function FindRootDesigner(AComponent: TComponent): TIDesigner; var Form: TCustomForm; begin Result:=nil; if AComponent=nil then exit; while (AComponent<>nil) do begin if (AComponent is TCustomForm) then begin Form:=TCustomForm(AComponent); if Form.Parent=nil then begin Result:=Form.Designer; exit; end; end; if AComponent is TControl then begin AComponent:=TControl(AComponent).Parent; end else begin exit; end; end; end; function SendApplicationMsg(Msg: Cardinal; WParam, LParam: Longint): Longint; begin if (Application<>nil) and (Application.HandleAllocated) then Result := SendMessage(Application.Handle, Msg, WParam, LParam) else Result := 0; end; procedure IfOwnerIsFormThenDesignerModified(AComponent: TComponent); begin if (AComponent<>nil) and (AComponent.Owner<>nil) and ([csDesigning,csLoading]*AComponent.ComponentState=[csDesigning]) and (AComponent.Owner is TForm) and (TForm(AComponent.Owner).Designer <> nil) then TForm(AComponent.Owner).Designer.Modified; end; function GetShortHint(const Hint: string): string; var I: Integer; begin I := Pos('|', Hint); if I = 0 then Result := Hint else Result := Copy(Hint, 1, I - 1); end; function GetLongHint(const Hint: string): string; var I: Integer; begin I := Pos('|', Hint); if I = 0 then Result := Hint else Result := Copy(Hint, I + 1, Maxint); end; procedure FreeInterfaceObject; begin Application.Free; Application:=nil; FreeAllClipBoards; InterfaceObject.Free; InterfaceObject:=nil; end; //============================================================================== {$I scrollingwincontrol.inc} {$I scrollbox.inc} {$I customform.inc} {$I screen.inc} {$I application.inc} {$I hintwindow.inc} initialization FocusCount := 0; Focusmessages := True; HintWindowClass := THintWindow; LCLProc.OwnerFormDesignerModifiedProc:=@IfOwnerIsFormThenDesignerModified; Screen:= TScreen.Create(nil); Application:= TApplication.Create(nil); finalization writeln('forms.pp - finalization section'); LCLProc.OwnerFormDesignerModifiedProc:=nil; HintWindowClass:=THintWindow; FreeThenNil(Application); FreeThenNil(Screen); end.