/
fpg_base.pas
1547 lines (1334 loc) · 47.7 KB
/
fpg_base.pas
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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2013 See the file AUTHORS.txt, included in this
distribution, for details of the copyright.
See the file COPYING.modifiedLGPL, included in this distribution,
for details about redistributing fpGUI.
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.
Description:
The Big Bang starts here! The starting unit for fpGUI.
}
unit fpg_base;
{$mode objfpc}{$H+}
// To enable the AggPas powered Canvas
{.$define AGGCanvas}
// For debug use only
{.$define GDEBUG}
interface
uses
Classes,
SysUtils,
syncobjs, // TCriticalSection usage
variants, contnrs;
type
TfpgCoord = integer; // we might use floating point coordinates in the future...
TfpgColor = type longword; // Always in AARRGGBB (Alpha, Red, Green, Blue) format!!
TfpgString = type AnsiString;
TfpgChar = type String[4];
PPoint = ^TPoint;
TRGBTriple = packed record
Red: byte;
Green: byte;
Blue: byte;
Alpha: byte;
end;
// Same declaration as in FPImage unit, but we don't use FPImage yet, so declare it here
TFPColor = record
Red: byte;
Green: byte;
Blue: byte;
Alpha: byte;
end deprecated;
TWindowType = (wtChild, wtWindow, wtModalForm, wtPopup);
TWindowAttribute = (waSizeable, waAutoPos, waScreenCenterPos, waStayOnTop,
waFullScreen, waBorderless, waUnblockableMessages, waX11SkipWMHints,
waOneThirdDownPos);
TWindowAttributes = set of TWindowAttribute;
TfpgWindowState = (wsNormal, wsMinimized, wsMaximized);
TMouseCursor = (mcDefault, mcArrow, mcCross, mcIBeam, mcSizeEW, mcSizeNS,
mcSizeNWSE, mcSizeNESW, mcSizeSWNE, mcSizeSENW, mcMove, mcHourGlass,
mcHand, mcDrag, mcNoDrop);
TGradientDirection = (gdVertical, // Fill vertical
gdHorizontal); // Fill Horizontal
TClipboardKeyType = (ckNone, ckCopy, ckPaste, ckCut);
// If you have to convert this to an Integer, mrNone = 0 etc.
TfpgModalResult = (mrNone, mrOK, mrCancel, mrYes, mrNo, mrAbort, mrRetry,
mrIgnore, mrAll, mrNoToAll, mrYesToAll, mrHelp);
TfpgDropAction = (daIgnore, daCopy, daMove, daLink, daAsk);
TfpgDropActions = set of TfpgDropAction;
TfpgEditBorderStyle = (ebsNone, ebsDefault, ebsSingle);
// in case we wanted to trap any fpGUI specific exceptions
EfpGUIException = class(Exception);
// For providing user feedback. No need to display backtrace information
EfpGUIUserFeedbackException = class(EfpGUIException);
TfpgTextEncoding = (encUTF8, encCP437, encCP850, encCP866, encCP1250, encIBMGraph);
const
MOUSE_LEFT = 1;
MOUSE_RIGHT = 3;
MOUSE_MIDDLE = 2;
// Platform independent messages used by fpGUI (TfpgWidget)
FPGM_PAINT = 1;
FPGM_ACTIVATE = 2;
FPGM_DEACTIVATE = 3;
FPGM_KEYPRESS = 4;
FPGM_KEYRELEASE = 5;
FPGM_KEYCHAR = 6;
FPGM_MOUSEDOWN = 7;
FPGM_MOUSEUP = 8;
FPGM_MOUSEMOVE = 9;
FPGM_DOUBLECLICK = 10;
FPGM_MOUSEENTER = 11;
FPGM_MOUSEEXIT = 12;
FPGM_CLOSE = 13;
FPGM_SCROLL = 14;
FPGM_RESIZE = 15;
FPGM_MOVE = 16;
FPGM_POPUPCLOSE = 17;
FPGM_HINTTIMER = 18;
FPGM_FREEME = 19;
FPGM_DROPENTER = 20;
FPGM_DROPEXIT = 21;
FPGM_HSCROLL = 22;
FPGM_USER = 50000;
FPGM_KILLME = MaxInt;
var
{$IFDEF MSWINDOWS}
FPG_DEFAULT_FONT_DESC: string = 'Arial-8:antialias=true';
FPG_DEFAULT_SANS: string = 'Arial';
{$ENDIF}
{$IFDEF UNIX}
FPG_DEFAULT_FONT_DESC: string = 'Liberation Sans-10:antialias=true';
FPG_DEFAULT_SANS: string = 'Liberation Sans';
{$ENDIF}
const
UserNamedColorStart = 128;
type
TfpgRect = object // not class for static allocations
Top: TfpgCoord;
Left: TfpgCoord;
Width: TfpgCoord;
Height: TfpgCoord;
procedure SetRect(aleft, atop, awidth, aheight: TfpgCoord);
function Bottom: TfpgCoord;
function Right: TfpgCoord;
procedure SetBottom(Value: TfpgCoord);
procedure SetRight(Value: TfpgCoord);
end;
TfpgPoint = object // not class for static allocations
X: integer;
Y: integer;
procedure SetPoint(AX, AY: integer);
function ManhattanLength: integer; { See URL for explanation http://en.wikipedia.org/wiki/Taxicab_geometry }
function ManhattanLength(const PointB: TfpgPoint): integer;
end;
TfpgSize = object // not class for static allocations
W: integer;
H: integer;
procedure SetSize(AWidth, AHeight: integer);
end;
TfpgMsgParmMouse = record
x: TfpgCoord;
y: TfpgCoord;
Buttons: word;
shiftstate: TShiftState;
delta: Integer;
timestamp: TDateTime; // for future use
end;
TfpgMsgParmKeyboard = record
keycode: word;
keychar: TfpgChar;
shiftstate: TShiftState;
end;
TfpgMsgParmUser = record
Param1: Integer;
Param2: Integer;
Param3: Integer;
end;
TfpgMessageParams = record
case integer of
0: (mouse: TfpgMsgParmMouse);
1: (keyboard: TfpgMsgParmKeyboard);
2: (rect: TfpgRect);
3: (user: TfpgMsgParmUser);
end;
TfpgMessageRec = record
MsgCode: integer;
Sender: TObject;
Dest: TObject;
Params: TfpgMessageParams;
Stop: Boolean;
end;
PfpgMessageRec = ^TfpgMessageRec;
TfpgMoveEventRec = record
Sender: TObject;
x: TfpgCoord;
y: TfpgCoord;
end;
TfpgLineStyle = (lsSolid, lsDash, lsDot, lsDashDot, lsDashDotDot);
// forward declaration
TfpgWindowBase = class;
TfpgCanvasBase = class;
TfpgImageBase = class(TObject)
private
function GetColor(x, y: TfpgCoord): TfpgColor;
procedure SetColor(x, y: TfpgCoord; const AValue: TfpgColor);
protected
FWidth: integer;
FHeight: integer;
FColorDepth: integer;
FMasked: boolean;
FImageData: pointer;
FImageDataSize: integer;
FMaskData: pointer;
FMaskDataSize: integer;
FMaskPoint: TPoint;
procedure DoFreeImage; virtual; abstract;
procedure DoInitImage(acolordepth, awidth, aheight: integer; aimgdata: Pointer); virtual; abstract;
procedure DoInitImageMask(awidth, aheight: integer; aimgdata: Pointer); virtual; abstract;
public
constructor Create;
destructor Destroy; override;
procedure Invert(IncludeMask: Boolean = False);
procedure FreeImage;
procedure AllocateImage(acolordepth, awidth, aheight: integer);
procedure AllocateMask;
procedure CreateMaskFromSample(x, y: TfpgCoord);
{ Must always be called AFTER you populated the ImageData array. Then only does it allocate OS resources. }
procedure UpdateImage;
{ Internal representation of color data is always ARGB }
property ImageData: pointer read FImageData;
property ImageDataSize: integer read FImageDataSize;
property MaskData: pointer read FMaskData;
property MaskDataSize: integer read FMaskDataSize;
property Width: integer read FWidth;
property Height: integer read FHeight;
property ColorDepth: integer read FColorDepth;
property Masked: boolean read FMasked;
property MaskPoint: TPoint read FMaskPoint;
property Colors[x, y: TfpgCoord]: TfpgColor read GetColor write SetColor;
end;
TfpgFontResourceBase = class(TObject)
public
function GetAscent: integer; virtual; abstract;
function GetDescent: integer; virtual; abstract;
function GetHeight: integer; virtual; abstract;
function GetTextWidth(const txt: string): integer; virtual; abstract;
end;
TfpgFontBase = class(TObject)
protected
FFontDesc: string;
FFontRes: TfpgFontResourceBase;
function GetIsFixedWidth: boolean; virtual;
public
function TextWidth(const txt: TfpgString): integer;
function Ascent: integer;
function Descent: integer;
function Height: integer;
property FontDesc: string read FFontDesc;
property FontRes: TfpgFontResourceBase read FFontRes;
property Handle: TfpgFontResourceBase read FFontRes;
property IsFixedWidth: boolean read GetIsFixedWidth;
end;
TfpgCustomInterpolation = class(TObject)
private
FCanvas: TfpgCanvasBase;
FImage: TfpgImageBase;
protected
procedure Initialize(AImage: TfpgImageBase; ACanvas: TfpgCanvasBase); virtual;
procedure Execute(x, y, w, h: integer); virtual; abstract;
public
property Canvas: TfpgCanvasBase read FCanvas;
property Image: TfpgImageBase read FImage;
end;
TfpgBaseInterpolation = class(TfpgCustomInterpolation)
private
xfactor: double;
yfactor: double;
xsupport: double;
ysupport: double;
tempimage: TfpgImageBase;
procedure Horizontal(width: integer);
procedure Vertical(dx, dy, width, height: integer);
protected
procedure Execute(x, y, w, h: integer); override;
function Filter(x : double): double; virtual; abstract;
function MaxSupport: double; virtual; abstract;
public
destructor Destroy; override;
end;
TfpgMitchelInterpolation = class(TfpgBaseInterpolation)
protected
function Filter(x: double): double; override;
function MaxSupport: double; override;
end;
TfpgCanvasBase = class(TObject)
private
FFastDoubleBuffer: Boolean;
FInterpolation: TfpgCustomInterpolation;
procedure SetInterpolation(const AValue: TfpgCustomInterpolation);
protected
FBufferedDraw: boolean;
FBeginDrawCount: integer;
FWindow: TfpgWindowBase;
FColor: TfpgColor;
FTextColor: TfpgColor;
FLineWidth: integer;
FLineStyle: TfpgLineStyle;
FFont: TfpgFontBase;
FPersistentResources: boolean;
procedure DoSetFontRes(fntres: TfpgFontResourceBase); virtual; abstract;
procedure DoSetTextColor(cl: TfpgColor); virtual; abstract;
procedure DoSetColor(cl: TfpgColor); virtual; abstract;
procedure DoSetLineStyle(awidth: integer; astyle: TfpgLineStyle); virtual; abstract;
procedure DoGetWinRect(out r: TfpgRect); virtual; abstract;
procedure DoFillRectangle(x, y, w, h: TfpgCoord); virtual; abstract;
procedure DoXORFillRectangle(col: TfpgColor; x, y, w, h: TfpgCoord); virtual; abstract;
procedure DoFillTriangle(x1, y1, x2, y2, x3, y3: TfpgCoord); virtual; abstract;
procedure DoDrawRectangle(x, y, w, h: TfpgCoord); virtual; abstract;
procedure DoDrawLine(x1, y1, x2, y2: TfpgCoord); virtual; abstract;
procedure DoDrawImagePart(x, y: TfpgCoord; img: TfpgImageBase; xi, yi, w, h: integer); virtual; abstract;
procedure DoDrawString(x, y: TfpgCoord; const txt: string); virtual; abstract;
procedure DoSetClipRect(const ARect: TfpgRect); virtual; abstract;
function DoGetClipRect: TfpgRect; virtual; abstract;
procedure DoAddClipRect(const ARect: TfpgRect); virtual; abstract;
procedure DoClearClipRect; virtual; abstract;
procedure DoBeginDraw(awin: TfpgWindowBase; buffered: boolean); virtual; abstract;
procedure DoPutBufferToScreen(x, y, w, h: TfpgCoord); virtual; abstract;
procedure DoEndDraw; virtual; abstract;
function GetPixel(X, Y: integer): TfpgColor; virtual; abstract;
procedure SetPixel(X, Y: integer; const AValue: TfpgColor); virtual; abstract;
procedure DoDrawArc(x, y, w, h: TfpgCoord; a1, a2: Extended); virtual; abstract;
procedure DoFillArc(x, y, w, h: TfpgCoord; a1, a2: Extended); virtual; abstract;
procedure DoDrawPolygon(Points: PPoint; NumPts: Integer; Winding: boolean = False); virtual; abstract;
public
constructor Create(awin: TfpgWindowBase); virtual;
destructor Destroy; override;
procedure DrawRectangle(x, y, w, h: TfpgCoord); overload;
procedure DrawRectangle(r: TfpgRect); overload;
procedure DrawLine(x1, y1, x2, y2: TfpgCoord);
procedure DrawLineClipped(var x1, y1, x2, y2: TfpgCoord; const AClipRect: TfpgRect);
procedure ClipLine(var x1, y1, x2, y2: TfpgCoord; const AClipRect: TfpgRect; out FallsOutsideRegion: Boolean);
procedure DrawImage(x, y: TfpgCoord; img: TfpgImageBase);
procedure DrawImagePart(x, y: TfpgCoord; img: TfpgImageBase; xi, yi, w, h: integer);
procedure DrawArc(x, y, w, h: TfpgCoord; a1, a2: double);
procedure DrawPolygon(const Points: array of TPoint; Winding: Boolean; StartIndex: Integer = 0; NumPts: Integer = -1);
procedure DrawPolygon(Points: PPoint; NumPts: Integer; Winding: boolean = False); virtual;
procedure DrawPolygon(const Points: array of TPoint);
procedure StretchDraw (x, y, w, h: TfpgCoord; ASource: TfpgImageBase);
procedure CopyRect(ADest_x, ADest_y: TfpgCoord; ASrcCanvas: TfpgCanvasBase; var ASrcRect: TfpgRect); virtual;
// x,y is the top/left corner of where the text output will start.
procedure DrawString(x, y: TfpgCoord; const txt: string);
procedure FillRectangle(x, y, w, h: TfpgCoord); overload;
procedure FillRectangle(r: TfpgRect); overload;
procedure FillTriangle(x1, y1, x2, y2, x3, y3: TfpgCoord);
procedure FillArc(x, y, w, h: TfpgCoord; a1, a2: double);
procedure GradientFill(ARect: TfpgRect; AStart, AStop: TfpgColor; ADirection: TGradientDirection);
procedure XORFillRectangle(col: TfpgColor; x, y, w, h: TfpgCoord); overload;
procedure XORFillRectangle(col: TfpgColor; r: TfpgRect); overload;
procedure SetClipRect(const ARect: TfpgRect);
function GetClipRect: TfpgRect;
function GetLineWidth: integer;
procedure AddClipRect(const ARect: TfpgRect);
procedure ClearClipRect;
procedure Clear(AColor: TfpgColor);
procedure GetWinRect(out r: TfpgRect);
procedure SetColor(AColor: TfpgColor);
procedure SetTextColor(AColor: TfpgColor);
procedure SetLineStyle(AWidth: integer; AStyle: TfpgLineStyle);
procedure SetFont(AFont: TfpgFontBase);
procedure BeginDraw; overload;
procedure BeginDraw(ABuffered: boolean); overload;
procedure EndDraw(x, y, w, h: TfpgCoord); overload;
procedure EndDraw(ARect: TfpgRect); overload;
procedure EndDraw; overload;
procedure FreeResources;
property Color: TfpgColor read FColor write SetColor;
property TextColor: TfpgColor read FTextColor write SetTextColor;
property Font: TfpgFontBase read FFont write SetFont;
property Pixels[X, Y: integer]: TfpgColor read GetPixel write SetPixel;
property InterpolationFilter: TfpgCustomInterpolation read FInterpolation write SetInterpolation;
property FastDoubleBuffer: Boolean read FFastDoubleBuffer write FFastDoubleBuffer;
property LineStyle: TfpgLineStyle read FLineStyle;
end;
TfpgCanvasBaseClass = class of TfpgCanvasBase;
TfpgComponent = class(TComponent)
private
FTagPointer: Pointer;
FHelpContext: THelpContext;
FHelpKeyword: TfpgString;
FHelpType: THelpType;
protected
procedure SetHelpContext(const AValue: THelpContext); virtual;
procedure SetHelpKeyword(const AValue: TfpgString); virtual;
public
constructor Create(AOwner: TComponent); override;
property TagPointer: Pointer read FTagPointer write FTagPointer;
published
property HelpContext: THelpContext read FHelpContext write SetHelpContext default 0;
property HelpKeyword: TfpgString read FHelpKeyword write SetHelpKeyword;
property HelpType: THelpType read FHelpType write FHelpType default htKeyword;
end;
TfpgWindowBase = class(TfpgComponent)
private
FParent: TfpgWindowBase;
procedure SetMouseCursor(const AValue: TMouseCursor);
function ConstraintWidth(NewWidth: TfpgCoord): TfpgCoord;
function ConstraintHeight(NewHeight: TfpgCoord): TfpgCoord;
protected
FMouseCursor: TMouseCursor;
FWindowType: TWindowType;
FWindowAttributes: TWindowAttributes;
FTop: TfpgCoord;
FLeft: TfpgCoord;
FWidth: TfpgCoord;
FHeight: TfpgCoord;
FPrevTop: TfpgCoord;
FPrevLeft: TfpgCoord;
FPrevWidth: TfpgCoord;
FPrevHeight: TfpgCoord;
FMinWidth: TfpgCoord;
FMinHeight: TfpgCoord;
FMaxHeight: TfpgCoord;
FMaxWidth: TfpgCoord;
FCanvas: TfpgCanvasBase;
FSizeIsDirty: Boolean;
FPosIsDirty: Boolean;
FMouseCursorIsDirty: Boolean;
FOnDragStartDetected: TNotifyEvent;
FDragActive: boolean;
FWindowState: TfpgWindowState;
function HandleIsValid: boolean; virtual; abstract;
procedure DoUpdateWindowPosition; virtual; abstract;
procedure DoAllocateWindowHandle(AParent: TfpgWindowBase); virtual; abstract;
procedure DoReleaseWindowHandle; virtual; abstract;
procedure DoRemoveWindowLookup; virtual; abstract;
procedure DoSetWindowVisible(const AValue: Boolean); virtual; abstract;
procedure DoMoveWindow(const x: TfpgCoord; const y: TfpgCoord); virtual; abstract;
function DoWindowToScreen(ASource: TfpgWindowBase; const AScreenPos: TPoint): TPoint; virtual; abstract;
procedure DoSetWindowTitle(const ATitle: string); virtual; abstract;
procedure DoSetMouseCursor; virtual; abstract;
procedure DoDNDEnabled(const AValue: boolean); virtual; abstract;
procedure DoAcceptDrops(const AValue: boolean); virtual; abstract;
function GetWindowState: TfpgWindowState; virtual;
procedure SetWindowState(const AValue: TfpgWindowState); virtual;
procedure DoDragStartDetected; virtual;
procedure SetParent(const AValue: TfpgWindowBase); virtual;
function GetParent: TfpgWindowBase; virtual;
function GetCanvas: TfpgCanvasBase; virtual;
procedure AllocateWindowHandle;
procedure ReleaseWindowHandle;
procedure SetWindowTitle(const ATitle: string); virtual;
procedure SetTop(const AValue: TfpgCoord);
procedure SetLeft(const AValue: TfpgCoord);
procedure SetHeight(const AValue: TfpgCoord);
procedure SetWidth(const AValue: TfpgCoord);
procedure HandleMove(x, y: TfpgCoord); virtual;
procedure HandleResize(AWidth, AHeight: TfpgCoord); virtual;
property OnDragStartDetected: TNotifyEvent read FOnDragStartDetected write FOnDragStartDetected;
property WindowState: TfpgWindowState read GetWindowState {write SetWindowState} default wsNormal;
public
// The standard constructor.
constructor Create(AOwner: TComponent); override;
procedure AfterConstruction; override;
// Make some setup before the window shows. Forms modify the window creation parameters.
procedure AdjustWindowStyle; virtual;
// Make some setup before the window shows. Invoked after the window is created.
procedure SetWindowParameters; virtual;
// general properties and functions
function Right: TfpgCoord;
function Bottom: TfpgCoord;
procedure UpdateWindowPosition;
procedure MoveWindow(const x: TfpgCoord; const y: TfpgCoord);
function WindowToScreen(ASource: TfpgWindowBase; const AScreenPos: TPoint): TPoint;
function HasParent: Boolean; override;
function GetClientRect: TfpgRect; virtual;
function GetBoundsRect: TfpgRect; virtual;
procedure ActivateWindow; virtual; abstract;
procedure CaptureMouse; virtual; abstract;
procedure ReleaseMouse; virtual; abstract;
procedure BringToFront; virtual; abstract;
procedure SetFullscreen(AValue: Boolean); virtual;
property HasHandle: boolean read HandleIsValid;
property WindowType: TWindowType read FWindowType write FWindowType;
property WindowAttributes: TWindowAttributes read FWindowAttributes write FWindowAttributes;
property Left: TfpgCoord read FLeft write SetLeft;
property Top: TfpgCoord read FTop write SetTop;
property Width: TfpgCoord read FWidth write SetWidth;
property Height: TfpgCoord read FHeight write SetHeight;
property MinWidth: TfpgCoord read FMinWidth write FMinWidth;
property MinHeight: TfpgCoord read FMinHeight write FMinHeight;
property MaxWidth: TfpgCoord read FMaxWidth write FMaxWidth default 0;
property MaxHeight: TfpgCoord read FMaxHeight write FMaxHeight default 0;
property Canvas: TfpgCanvasBase read GetCanvas;
property Parent: TfpgWindowBase read GetParent write SetParent;
property MouseCursor: TMouseCursor read FMouseCursor write SetMouseCursor;
end;
TfpgApplicationBase = class(TfpgComponent)
private
FMainForm: TfpgWindowBase;
FTerminated: boolean;
FCritSect: TCriticalSection;
FHelpKey: word;
FHelpFile: TfpgString;
function GetForm(Index: Integer): TfpgWindowBase;
function GetFormCount: integer;
function GetTopModalForm: TfpgWindowBase;
function GetHelpFile: TfpgString;
protected
FOnIdle: TNotifyEvent;
FIsInitialized: Boolean;
FModalFormStack: TList;
function DoGetFontFaceList: TStringList; virtual; abstract;
procedure DoWaitWindowMessage(atimeoutms: integer); virtual; abstract;
function MessagesPending: boolean; virtual; abstract;
function GetHelpViewer: TfpgString; virtual;
public
constructor Create(const AParams: string); virtual; reintroduce;
destructor Destroy; override;
function GetFontFaceList: TStringList;
procedure PushModalForm(AForm: TfpgWindowBase);
procedure PopModalForm;
function PrevModalForm: TfpgWindowBase;
function RemoveWindowFromModalStack(AForm: TfpgWindowBase): Integer;
procedure CreateForm(InstanceClass: TComponentClass; out Reference);
function GetScreenWidth: TfpgCoord; virtual; abstract;
function GetScreenHeight: TfpgCoord; virtual; abstract;
function Screen_dpi_x: integer; virtual; abstract;
function Screen_dpi_y: integer; virtual; abstract;
function Screen_dpi: integer; virtual; abstract;
procedure Terminate;
procedure Lock;
procedure Unlock;
procedure InvokeHelp;
function ContextHelp(const AHelpContext: THelpContext): Boolean;
function KeywordHelp(const AHelpKeyword: string): Boolean;
property FormCount: integer read GetFormCount;
property Forms[Index: Integer]: TfpgWindowBase read GetForm;
property HelpContext;
property HelpFile: TfpgString read GetHelpFile write FHelpFile;
property IsInitialized: boolean read FIsInitialized;
property TopModalForm: TfpgWindowBase read GetTopModalForm;
property MainForm: TfpgWindowBase read FMainForm write FMainForm;
property Terminated: boolean read FTerminated write FTerminated;
property OnIdle: TNotifyEvent read FOnIdle write FOnIdle;
end;
TfpgClipboardBase = class(TObject)
protected
function DoGetText: TfpgString; virtual; abstract;
procedure DoSetText(const AValue: TfpgString); virtual; abstract;
procedure InitClipboard; virtual; abstract;
public
constructor Create; virtual;
property Text: TfpgString read DoGetText write DoSetText;
end;
TFileEntryType = (etFile, etDir);
TFileListSortOrder = (soNone, soFileName, soCSFileName, soFileExt, soSize, soTime);
TFileModeString = string[9];
TfpgSearchMode = (smAny, smFiles, smDirs);
// A simple data object
TFileEntry = class(TObject)
private
FEntryType: TFileEntryType;
FExtension: string;
FName: string;
FModTime: TDateTime;
FSize: int64;
FIsLink: boolean;
FLinkTarget: string;
FIsExecutable: boolean;
FModeString: TFileModeString;
FOwner: TfpgString;
FGroup: TfpgString;
FAttrString: TFileModeString;
public
constructor Create;
property Name: string read FName write FName;
property Extension: string read FExtension write FExtension;
property Size: int64 read FSize write FSize;
property EntryType: TFileEntryType read FEntryType write FEntryType;
property IsLink: boolean read FIsLink write FIsLink;
property LinkTarget: string read FLinkTarget write FLinkTarget;
property IsExecutable: boolean read FIsExecutable write FIsExecutable;
property ModTime: TDateTime read FModTime write FModTime;
property Mode: TFileModeString read FModeString write FModeString;
property Owner: TfpgString read FOwner write FOwner;
property Group: TfpgString read FGroup write FGroup;
property Attributes: TFileModeString read FAttrString write FAttrString;
end;
TfpgFileListBase = class(TObject)
private
FEntries: TList;
FDirectoryName: TfpgString;
FFileMask: TfpgString;
FSearchMode: TfpgSearchMode;
FShowHidden: boolean;
FCurrentSpecialDir: integer;
procedure AddEntry(sr: TSearchRec);
function GetEntry(i: integer): TFileEntry;
function HasAttrib(fileAttrib, testAttrib: Integer): Boolean;
protected
FSpecialDirs: TStringList;
FHasFileMode: boolean;
function InitializeEntry(sr: TSearchRec): TFileEntry; virtual;
procedure PopulateSpecialDirs(const aDirectory: TfpgString); virtual;
public
constructor Create; virtual;
destructor Destroy; override;
function Count: integer;
function CurrentSpecialDir: integer;
function ReadDirectory(const aDirectory: TfpgString = ''): boolean;
procedure Clear;
procedure Sort(AOrder: TFileListSortOrder);
property DirectoryName: TfpgString read FDirectoryName;
property Entry[i: integer]: TFileEntry read GetEntry;
property FileMask: TfpgString read FFileMask write FFileMask;
property HasFileMode: boolean read FHasFileMode;
property SearchMode: TfpgSearchMode read FSearchMode write FSearchMode;
property ShowHidden: boolean read FShowHidden write FShowHidden;
property SpecialDirs: TStringList read FSpecialDirs;
end;
TfpgMimeDataItem = class(TObject)
public
format: TfpgString; { mime string type }
data: Variant;
constructor Create(const AFormat: TfpgString; const AData: variant); reintroduce;
end;
TfpgMimeDataBase = class(TObject)
private
{ TODO: This is wrong, we must have one Data Storage object }
FDataList: TObjectList;
FUrlList: TList;
function GetItem(AIndex: Integer): TfpgMimeDataItem;
function Geturls: TList;
procedure Seturls(const AValue: TList);
function GetText: TfpgString;
procedure SetText(const AValue: TfpgString);
function GetHTML: TfpgString;
procedure SetHTML(const AValue: TfpgString);
function GetCount: integer;
public
constructor Create;
destructor Destroy; override;
procedure Clear;
function HasFormat(const AMimeType: TfpgString): boolean;
function Formats: TStrings;
function GetData(const AMimeType: TfpgString): Variant;
procedure SetData(const AMimeType: TfpgString; const AData: Variant);
property Items[AIndex: Integer]: TfpgMimeDataItem read GetItem; default;
property urls: TList read Geturls write Seturls;
property Text: TfpgString read GetText write SetText;
property HTML: TfpgString read GetHTML write SetHTML;
property Count: integer read GetCount;
end;
TfpgDragBase = class(TObject)
protected
FDragging: Boolean;
FMimeData: TfpgMimeDataBase;
public
constructor Create;
destructor Destroy; override;
function Execute(const ADropActions: TfpgDropActions; const ADefaultAction: TfpgDropAction = daCopy): TfpgDropAction; virtual; abstract;
end;
{ TfpgBaseTimer }
TfpgBaseTimer = class(TObject)
private
FNextAlarm: TDateTime;
FInterval: integer;
FOnTimer: TNotifyEvent;
procedure SetInterval(const AValue: integer);
protected
FEnabled: boolean;
procedure SetEnabled(const AValue: boolean); virtual;
public
constructor Create(AInterval: integer); virtual;
destructor Destroy; override;
procedure CheckAlarm(ACurrentTime: TDateTime);
procedure Reset;
procedure Pause(ASeconds: integer);
property Enabled: boolean read FEnabled write SetEnabled;
property NextAlarm: TDateTime read FNextAlarm;
{ Interval is in milliseconds. }
property Interval: integer read FInterval write SetInterval;
property OnTimer: TNotifyEvent read FOnTimer write FOnTimer;
end;
{ ******** Helper functions ******** }
{ Keyboard }
function KeycodeToText(AKey: Word; AShiftState: TShiftState): string;
function CheckClipboardKey(AKey: Word; AShiftstate: TShiftState): TClipboardKeyType;
{ Color }
function fpgColorToRGBTriple(const AColor: TfpgColor): TRGBTriple;
function fpgColorToFPColor(const AColor: TfpgColor): TFPColor; deprecated;
function RGBTripleTofpgColor(const AColor: TRGBTriple): TfpgColor;
function FPColorTofpgColor(const AColor: TFPColor): TfpgColor; deprecated;
function fpgGetRed(const AColor: TfpgColor): byte;
function fpgGetGreen(const AColor: TfpgColor): byte;
function fpgGetBlue(const AColor: TfpgColor): byte;
function fpgGetAlpha(const AColor: TfpgColor): byte;
function fpgGetAvgColor(const AColor1, AColor2: TfpgColor): TfpgColor;
function fpgColor(const ARed, AGreen, ABlue: byte): TfpgColor;
function fpgColor(const ARed, AGreen, ABlue, AAlpha: byte): TfpgColor;
function fpgDarker(const AColor: TfpgColor; APercent: Byte = 50): TfpgColor;
function fpgLighter(const AColor: TfpgColor; APercent: Byte = 50): TfpgColor;
{ Points }
procedure SortRect(var ARect: TRect);
procedure SortRect(var ARect: TfpgRect);
procedure SortRect(var left, top, right, bottom: integer);
implementation
uses
typinfo,
process,
{$IFDEF GDEBUG}
fpg_dbugintf,
{$ENDIF}
dateutils;
const
NoDefault = $80000000;
tkPropsWithDefault = [tkInteger, tkChar, tkSet, tkEnumeration];
procedure SortRect(var ARect: TRect);
begin
with ARect do
SortRect(left, top, right, bottom);
end;
procedure SortRect(var ARect: TfpgRect);
var
r: TfpgCoord;
b: TfpgCoord;
begin
r := ARect.Right;
b := ARect.Bottom;
SortRect(ARect.Left, ARect.Top, r, b);
ARect.SetRight(r);
ARect.SetBottom(b);
end;
procedure SortRect(var left, top, right, bottom: integer);
var
r: integer;
begin
if left > right then
begin
r := left;
left := right;
right := r;
end;
if top > bottom then
begin
r := top;
top := bottom;
bottom := r;
end;
end;
// This function uses RTTI to automatically set the default values of properties.
// That means we don't have to do it in the constructor anymore! :-)
procedure SetDefaults(Obj: TObject);
var
PropInfos: PPropList;
Count, Loop: Integer;
begin
PropInfos := nil;
{ Find out how many properties we'll be considering }
Count := GetPropList(Obj.ClassInfo, tkPropsWithDefault, nil);
{ Allocate memory to hold their RTTI data }
GetMem(PropInfos, Count * SizeOf(PPropInfo));
try
{ Get hold of the property list in our new buffer }
GetPropList(Obj.ClassInfo, tkPropsWithDefault, PropInfos);
{ Loop through all the selected properties }
for Loop := 0 to Count - 1 do
begin
with PropInfos^[Loop]^ do
begin
{ If there is supposed to be a default value... }
if Default <> NoDefault then
{ ...then jolly well set it }
SetOrdProp(Obj, PropInfos^[Loop], Default)
end;
end;
finally
FreeMem(PropInfos, Count * SizeOf(PPropInfo));
end;
end;
{ TfpgRect }
procedure TfpgRect.SetRect(aleft, atop, awidth, aheight: TfpgCoord);
begin
Left := aleft;
Top := atop;
Width := awidth;
Height := aheight;
end;
function TfpgRect.Bottom: TfpgCoord;
begin
Result := Top + Height - 1;
end;
function TfpgRect.Right: TfpgCoord;
begin
Result := Left + Width - 1;
end;
procedure TfpgRect.SetBottom(Value: TfpgCoord);
begin
Height := Value - Top + 1;
end;
procedure TfpgRect.SetRight(Value: TfpgCoord);
begin
Width := Value - Left + 1;
end;
{ TfpgPoint }
procedure TfpgPoint.SetPoint(AX, AY: integer);
begin
X := AX;
Y := AY;
end;
function TfpgPoint.ManhattanLength: integer;
begin
Result := Abs(X) + Abs(Y);
end;
function TfpgPoint.ManhattanLength(const PointB: TfpgPoint): integer;
begin
Result := Abs(PointB.X-X) + Abs(PointB.Y-Y);
end;
{ TfpgSize }
procedure TfpgSize.SetSize(AWidth, AHeight: integer);
begin
W := AWidth;
H := AHeight;
end;
{ TfpgWindowBase }
procedure TfpgWindowBase.SetMouseCursor(const AValue: TMouseCursor);
begin
if FMouseCursor = AValue then
Exit; //==>
FMouseCursor := AValue;
DoSetMouseCursor;
end;
function TfpgWindowBase.ConstraintWidth(NewWidth: TfpgCoord): TfpgCoord;
begin
Result := NewWidth;
if (MaxWidth >= MinWidth) and (Result > MaxWidth) and (MaxWidth > 0) then
Result := MaxWidth;
if Result < MinWidth then
Result := MinWidth;
end;
function TfpgWindowBase.ConstraintHeight(NewHeight: TfpgCoord): TfpgCoord;
begin
Result := NewHeight;
if (MaxHeight >= MinHeight) and (Result > MaxHeight) and (MaxHeight > 0) then
Result := MaxHeight;
if Result < MinHeight then
Result := MinHeight;
end;
function TfpgWindowBase.GetWindowState: TfpgWindowState;
begin
Result := FWindowState;
end;
procedure TfpgWindowBase.SetWindowState(const AValue: TfpgWindowState);
begin
// do nothing
end;
procedure TfpgWindowBase.DoDragStartDetected;
begin
if Assigned(FOnDragStartDetected) then
FOnDragStartDetected(self);
end;
procedure TfpgWindowBase.SetParent(const AValue: TfpgWindowBase);
begin
FParent := AValue;
end;
function TfpgWindowBase.GetParent: TfpgWindowBase;
begin
result := FParent;
end;
function TfpgWindowBase.GetCanvas: TfpgCanvasBase;
begin
Result := FCanvas;
end;
procedure TfpgWindowBase.AllocateWindowHandle;
begin
DoAllocateWindowHandle(FParent);
if FMouseCursorIsDirty then
DoSetMouseCursor;
end;
procedure TfpgWindowBase.ReleaseWindowHandle;
begin
if HasHandle then
begin
Canvas.FreeResources;
DoReleaseWindowHandle;
end;
DoRemoveWindowLookup;
end;
procedure TfpgWindowBase.SetWindowTitle(const ATitle: string);