{ /*************************************************************************** forms.pp ------------------- Component Library Code Implements: TForm TApplication Initial Revision : Sun Mar 28 23:15:32 CST 1999 Revised : Sat Jul 15 1999 ***************************************************************************/ /*************************************************************************** * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * ***************************************************************************/ } unit Forms; {$mode objfpc} interface {$ifdef Trace} {$ASSERTIONS ON} {$endif} uses classes, controls, vclglobals, sysutils,graphics,Menus, LCLLinux,LMessages; type TFormStyle = (fsNormal, fsMDIChild, fsMDIFORM, fsStayOnTop); TFormBorderStyle = (bsNone, bsSingle, bsSizeable, bsDialog, bsToolWindow, bsSizeToolWin); TBorderStyle = bsNone..bsSingle; TPosition = (poDesigned, poDefault, poDefaultPosOnly, poDefaultSizeOnly, poScreenCenter, poDesktopCenter, poMainFormCenter, poOwnerFormCenter); TWindowState = (wsNormal, wsMinimized, wsMaximized); TCloseAction = (caNone, caHide, caFree, caMinimize); TControlScrollBar = class(TPersistent) end; TScrollingWinControl = class(TWinControl) private FHorzScrollBar : TControlScrollBar; FVertScrollBar : TControlScrollBar; FAutoScroll : Boolean; end; TDesigner = class; TCloseEvent = procedure(Sender: TObject; var Action: TCloseAction) of object; TCloseQueryEvent = procedure(Sender : TObject; var CanClose : boolean) of object; TFormState = set of (fsCreating, fsVisible, fsShowing, fsModal, fsCreatedMDIChild); TModalResult = low(Integer)..high(Integer); TCustomForm = class(TWinControl) private FActive : Boolean; FActiveControl : TWinControl; FBorderStyle : TFormBorderStyle; FCanvas : TControlCanvas; FDesigner : TDesigner; FFormStyle : TFormStyle; FKeyPreview: Boolean; FMenu : TMainMenu; FModalResult : TModalResult; FOnCreate: TNotifyEvent; FOnDestroy: TNotifyEvent; FOnHide: TNotifyEvent; FOnShow: TNotifyEvent; FOnPaint: TNotifyEvent; FOnClose: TCloseEvent; FOnCloseQuery : TCloseQueryEvent; FPosition : TPosition; FWindowState : TWindowState; Procedure ClientWndProc(var Message: TLMessage); procedure DoCreate; procedure DoDestroy; Procedure SetActiveControl(Value : TWinControl); Procedure SetBorderStyle(value : TFORMBorderStyle); Procedure SetDesigner(Value : TDesigner); Procedure SetMenu(value : TMainMenu); Procedure SetFormStyle(Value : TFormStyle); Procedure SetPosition(value : TPosition); Procedure SetWindowState(Value : TWIndowState); Function GetCanvas: TControlCanvas; Function IsForm : Boolean; { events } 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; procedure WMDestroy(var message: TLMDestroy); message LM_DESTROY; protected FFormState: TFormState; procedure AttachSignals; override; function CloseQuery : boolean; virtual; procedure CreateParams(var Params: TCreateParams); override; procedure CreateWnd; override; procedure DoClose(var Action: TCloseAction); dynamic; procedure DoHide; dynamic; procedure DoShow; dynamic; Function GetClientRect : TRect ; Override; procedure Paint; dynamic; Procedure RequestAlign; Override; procedure UpdateShowing; override; procedure UpdateWindowState; procedure ValidateRename(AComponent: TComponent; const CurName, NewName: string); procedure WndProc(var Message : TLMessage); override; property ActiveControl : TWinControl read FActiveControl write SetActiveControl; property FormStyle : TFormStyle read FFormStyle write SetFormStyle default fsNormal; property Position : TPosition read FPosition write SetPosition default poDesigned; {events} property OnCreate: TNotifyEvent read FOnCreate write FOnCreate; property OnDestroy: TNotifyEvent read FOnDestroy write FOnDestroy; property OnHide: TNotifyEvent read FOnHide write FOnHide; property OnShow: TNotifyEvent read FOnShow write FOnShow; property OnPaint: TNotifyEvent read FOnPaint write FOnPaint; property OnClose: TCloseEvent read FOnClose write FOnClose stored IsForm; property OnCloseQuery : TCloseQueryEvent read FOnCloseQuery write FOnCloseQuery stored IsForm; public constructor Create(AOwner: TComponent); override; constructor CreateNew(AOwner: TComponent; Num : Integer); virtual; procedure BeforeDestruction; override; destructor Destroy; override; procedure Close; procedure Hide; function WantChildKey(Child : TControl; var MEssage : TLMessage): Boolean; virtual; Procedure SetFocus; override; function SetFocusedControl(Control : TWinControl): Boolean ; Virtual; 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 : TDesigner read FDesigner write SetDesigner; 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 WindowState: TWindowState read FWindowState write SetWIndowState default wsNormal; end; TForm = class(TCustomForm) private FClientHandle: HWND; public constructor Create(AOwner: TComponent); override; destructor destroy; override; property ClientHandle: HWND read FClientHandle; published property ActiveCOntrol; property FormStyle; property Position; end; TFormClass = class of TForm; TScreen = class(TComponent) private FFormList: TList; FPixelsPerInch : integer; Function GetFormCount: Integer; Function GetForms(IIndex: Integer): TForm; function GetHeight : Integer; function GetWidth : Integer; procedure AddForm(FForm: TCustomForm); procedure RemoveForm(FForm: TCustomForm); public constructor Create(AOwner : TComponent); override; Destructor Destroy; Override; property FormCount: Integer read GetFormCount; property Forms[Index: Integer]: TForm read GetForms; property PixelsPerInch : integer read FPixelsPerInch; property Height : Integer read Getheight; property Width : Integer read GetWidth; end; TIdleEvent = procedure (Sender: TObject; var Done: Boolean) of object; TApplication = class(TComponent) private FHandle : THandle; FTerminate : Boolean; FMainForm : TForm; FList: TList; FMouseControl: TControl; FOnIdle: TIdleEvent; // MWE:Do we need this ?? // function ProcessMessage(Var Msg : TMsg) : Boolean; procedure wndproc(var Message : TLMessage); //the following is used for Messagebox button clicks. Temporary until I figure out a better way. procedure DefaultOnClick(Sender : TObject); //---- function GetExename: String; procedure MouseIdle(const CurrentControl: TControl); procedure Idle; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; Procedure BringToFront; procedure CreateForm(NewForm : TFormClass; var ref); procedure HandleMessage; procedure HintMouseMEssage(Control : TControl; var Message: TLMessage); procedure Initialize; function MessageBox(Text, Caption : PChar; Flags : Longint) : Integer; procedure Notification(AComponent : TComponent; Operation : TOperation); override; Procedure ProcessMessages; procedure Run; procedure Terminate; property Exename: String read GetExeName; property Handle: THandle read FHandle; property Terminated: Boolean read FTerminate; property MainForm: TForm read FMainForm; property OnIdle: TIdleEvent read FOnIdle write FOnIdle; end; TDesigner = class(TObject) private FCustomForm: TCustomForm; function GetIsControl: Boolean; procedure SetIsControl(Value: Boolean); 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; property IsControl: Boolean read GetIsControl write SetIsControl; property Form: TCustomForm read FCustomForm write FCustomForm; end; TProcedure = procedure; function KeysToShiftState(Keys:Word): TShiftState; function KeyDataToShiftState(KeyData: Longint): TShiftState; function GetParentForm(Control:TControl): TCustomForm; function IsAccel(VK : Word; const Str : String): Boolean; var Application : TApplication; Screen : TScreen; implementation uses buttons,stdctrls,interfaces; var FocusMessages : Boolean; //Should set it to TRUE by defualt but fpc does not handle that yet. 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 $20000000 <> 0 then Include(Result, ssAlt); end; function GetParentForm(Control:TControl): TCustomForm; begin while Control.parent <> nil do Control := Control.Parent; if Control is TCustomForm then Result := TCustomForm(Control) else Result := nil; end; function IsAccel(VK : Word; const Str : String): Boolean; begin Result := true; end; {$I form.inc} {$I Customform.inc} {$I screen.inc} {$I application.inc} {$I designer.inc} initialization Screen:= TScreen.Create(nil); Application:= TApplication.Create(nil); finalization Application.Free; Application:= nil; Screen.Free; Screen:= nil; end.