/
phGUIObj.pas
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phGUIObj.pas
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//**********************************************************************************************************************
// $Id: phGUIObj.pas,v 1.44 2007-07-01 18:06:50 dale Exp $
//----------------------------------------------------------------------------------------------------------------------
// PhoA image arranging and searching tool
// Copyright DK Software, http://www.dk-soft.org/
//**********************************************************************************************************************
unit phGUIObj;
interface
uses
Windows, Messages, Types, SysUtils, Graphics, Classes, Controls, ActnList, Forms,
TntWindows, TntControls, GR32, TB2Item, TBX,
phIntf, phMutableIntf, phAppIntf, phNativeIntf, phObj, phGraphics, ConsVars;
type
//===================================================================================================================
// TThumbnailViewer - ñðåäñòâî ïðîñìîòðà ýñêèçîâ èçîáðàæåíèé
//===================================================================================================================
TThumbnailViewerState = (
tvsLayoutChangePending, // Layout change pending
tvsSelectionChangePending); // Selection change pending
TThumbnailViewerStates = set of TThumbnailViewerState;
// Èíôîðìàöèÿ î ñîñòîÿíèè TThumbnailViewer, èñïîëüçóåìàÿ åãî ìåòîäàìè SaveDisplay() è RestoreDisplay()
IThumbnailViewerDisplayData = interface(IInterface)
['{436126B8-5E50-4BAB-83D1-CA83FE19B976}']
// Ñîõðàíåíèå/çàãðóçêà èç IPhoaDataStream
procedure SaveToDataStream(DataStream: IPhoaDataStream);
procedure LoadFromDataStream(DataStream: IPhoaDataStream);
// Prop handlers
function GetFocusedID: Integer;
function GetSelectedIDCount: Integer;
function GetSelectedIDs(Index: Integer): Integer;
function GetTopOffset: Integer;
// Props
// -- ID ñôîêóñèðîâàííîãî èçîáðàæåíèÿ
property FocusedID: Integer read GetFocusedID;
// -- Êîëè÷åñòâî ID âûäåëåííûõ èçîáðàæåíèé
property SelectedIDCount: Integer read GetSelectedIDCount;
// -- ID âûäåëåííûõ èçîáðàæåíèé ïî èíäåêñó
property SelectedIDs[Index: Integer]: Integer read GetSelectedIDs;
// -- Ñìåùåíèå âåðõíåãî êðàÿ îêíà ïðîñìîòðà
property TopOffset: Integer read GetTopOffset;
end;
// Èíôîðìàöèÿ äëÿ îòðèñîâêè îêíà
TThumbnailViewerPaintInfo = record
RClip: TRect; // ClipRect
RClient: TRect; // ClientRect
Bitmap: TBitmap32; // Buffer bitmap object
bFocused: Boolean; // True if control has focus
end;
// Êîîðäèíàòû îòðèñîâêè ìàðêåðà âñòàâêè ïåðåòàñêèâàåìûõ ýñêèçîâ
TViewerInsertionCoord = record
iIndex: Integer; // Èíäåêñ ýñêèçà, ÏÅÐÅÄ êîòîðûì íóæíî îòðèñîâàòü ëèíèþ âñòàâêè, [0..ItemCount], ïðè iIndex=ItemCount
// ìàðêåð äîëæåí áûòü îòðèñîâàí ïîñëå ïîñëåäíåãî ýñêèçà
bLower: Boolean; // Êîíòðîëèðóåò, êàê ïîñòóïàòü ïðè íåîäíîçíà÷íîñòè â îïðåäåëåíèè ïîëîæåíèÿ ìàðêåðà âñòàâêè, ò.å.
// êîãäà idx óêàçûâàåò íà ýñêèç, íàõîäÿùèéñÿ â íà÷àëå ñòðîêè è ïðè ýòîì íå ñàìûé âåðõíèé ëåâûé.
//  òàêîì ñëó÷àå, åñëè bLower=True, ìàðêåð ðèñóåòñÿ â êîíöå ïðåäûäóùåé ñòðîêè, åñëè False - â
// íà÷àëå òåêóùåé (ñëåâà îò äàííîãî ýñêèçà)
end;
// Ñòèëü ðàìêè ïîäëîæêè ýñêèçà
TThumbBackBorderStyle = (tbbsNone, tbbsFlat, tbbsRaised, tbbsSunken, tbbsPlain, tbbsGroove, tbbsXP, tbbsColor);
// Óãîë ýñêèçà
TThumbCorner = (tcLeftTop, tcRightTop, tcLeftBottom, tcRightBottom);
TThumbCornerDetail = record
bDisplay: Boolean; // True, åñëè ñâîéñòâî â äàííîì óãëó îòîáðàæàåòñÿ
Prop: TPicProperty; // Ñâîéñòâî äëÿ îòîáðàæåíèÿ
end;
TThumbCornerDetails = Array[TThumbCorner] of TThumbCornerDetail;
// Ðåæèì îòîáðàæåíèÿ TThumbnailViewer
TThumbViewerDisplayMode = (
tvdmTile, // Îáû÷íûé - â âèäå ñåòêè èç ýñêèçîâ
tvdmDetail); // Äåòàëüíûé - ñëåâà çíà÷îê, ñïðàâà îïèñàíèå
TThumbnailViewer = class(TCustomControl)
private
// Èíòåðôåéñ ñïèñêà èçîáðàæåíèé, îòîáðàæàåìûõ â êîíòðîëå
FPicList: IPhoaPicList;
// Áóôåðíûé áèòìýï äëÿ îòðèñîâêè ñîäåðæèìîãî îêíà êîíòðîëà
FBuffer: TBitmap32;
// Ðàçìåð ïóíêòà-ýñêèçà (âìåñòå ñ îòñòóïàìè, ãðàíèöàìè è ò.ï.)
FItemSize: TSize;
// Ïîëíàÿ âûñîòà "âèðòóàëüíîãî" îêíà (âñåõ ýñêèçîâ)
FVRange: Integer;
// Îáùåå êîëè÷åñòâî ýñêèçîâ
FItemCount: Integer;
// Êîëè÷åñòâî ýñêèçîâ, öåëèêîì îòîáðàæàþùèõñÿ â îêíå êîíòðîëà
FVisibleItems: Integer;
// Êîëè÷åñòâî ñòðîê ýñêèçîâ, öåëèêîì îòîáðàæàþùèõñÿ â îêíå êîíòðîëà
FVisibleRows: Integer;
// Êîëè÷åñòâî ñòîëáöîâ ñ ýñêèçàìè
FColCount: Integer;
// Âûñîòà îäíîé ñòðîêè òåêñòà, íàðèñîâàííîãî øðèôòîì êîíòðîëà
FTextLineHeight: Integer;
// Ôëàã âàëèäíîñòè ïàðàìåòðîâ øðèôòà
FFontParamsValid: Boolean;
// Áèòìýï òåíè ýñêèçà (nil, åñëè íåò âàëèäíîé ðàññ÷èòàííîé òåíè)
FThumbShadow: TBitmap32;
// Âûäåëåííûå ýñêèçû
FSelectedPics: IPhotoAlbumPicList;
// Èíäåêñ àêòèâíîãî ýñêèçà
FItemIndex: Integer;
// Èíäåêñ ýñêèçà, ñ êîòîðîãî íà÷àëîñü ïîòî÷íîå âûäåëåíèå (Shift+[ñòðåëêè] èëè Shift+[êëèê])
FStreamSelStart: Integer;
// Èíäåêñ ýñêèçà, êîòîðûé áóäåò âûäåëåí (ItemIndex), åñëè ïîëüçîâàòåëü îòîæì¸ò ëåâóþ êíîïêó ìûøè, íå ñäâèíóâ ìûøü
FNoMoveItemIndex: Integer;
// Ôëàã îæèäàíèÿ âõîäà â Dragging
FDragPending: Boolean;
// Êîîðäèíàòû íàæàòèÿ ìûøüþ äëÿ Dragging/Marqueing
FStartPos: TPoint;
// Òåêóùàÿ è ïðåæíÿÿ êîîðäèíàòû âñòàâêè ïåðåòàñêèâàåìûõ ýñêèçîâ
FDragTargetCoord: TViewerInsertionCoord;
FOldDragTargetCoord: TViewerInsertionCoord;
// Ñ÷¸ò÷èê áëîêèðîâêè
FUpdateLock: Integer;
// Ïîëÿ äëÿ ðàìêè ãðóïïîâîãî âûäåëåíèÿ (marquee)
FTempDC: HDC;
FMarqueing: Boolean;
FMarqueeCur: TPoint;
// Äàííûå, îòîáðàæàåìûå â óãëàõ ýñêèçîâ
FThumbCornerDetails: TThumbCornerDetails;
// Èíäåêñ ïóíêòà, äëÿ êîòîðîãî ïîñëåäíèé ðàç îòîáðàæàëñÿ Tooltip
FLastTooltipIdx: Integer;
// True, åñëè áûëà íàæàòà ïðàâàÿ êëàâèøà ìûøè âìåñòå ñ Ctrl, è ïðè å¸ îòïóñêàíèè íåîáõîäèìî îòîáðàçèòü ñèñòåìíîå
// êîíòåêñòíîå ìåíþ
FShellCtxMenuOnMouseUp: Boolean;
// Props storage
FBorderStyle: TBorderStyle;
FDisplayMode: TThumbViewerDisplayMode;
FDragEnabled: Boolean;
FDragInsideEnabled: Boolean;
FOnSelectionChange: TNotifyEvent;
FOnStartViewMode: TNotifyEvent;
FShowThumbTooltips: Boolean;
FStates: TThumbnailViewerStates;
FThumbBackBorderColor: TColor;
FThumbBackBorderStyle: TThumbBackBorderStyle;
FThumbBackColor: TColor;
FThumbFocusRectColor: TColor;
FThumbFontColor: TColor;
FThumbnailSize: TSize;
FThumbShadowBlurRadius: Integer;
FThumbShadowColor: TColor;
FThumbShadowOffset: TPoint;
FThumbShadowOpacity: Byte;
FThumbShadowVisible: Boolean;
FThumbTooltipProps: TPicProperties;
FTopOffset: Integer;
// Painting stage handlers
procedure Paint_EraseBackground(const Info: TThumbnailViewerPaintInfo);
procedure Paint_Thumbnails(const Info: TThumbnailViewerPaintInfo);
procedure Paint_Thumbnail(const Info: TThumbnailViewerPaintInfo; iIndex: Integer; ItemRect: TRect; bSelected: Boolean);
procedure Paint_TransferBuffer(const Info: TThumbnailViewerPaintInfo);
// Validates the specified offset and returns the correctly ranged offset value
function GetValidTopOffset(iOffset: Integer): Integer;
// Ðàññ÷èòûâàåò ïàðàìåòðû øðèôòà
procedure CalcFontParams;
// Óíè÷òîæàåò FShadowBitmap
procedure ResetShadow;
// Ãîòîâèò FShadowBitmap
procedure PrepareShadow;
// Âûçûâàåò [îòëîæåííûé] ïåðåñ÷¸ò ïàðàìåòðîâ îòîáðàæåíèÿ
procedure LayoutChanged;
// Âûçûâàåò [îòëîæåííîå] ñîáûòèå ñìåíû âûäåëåíèÿ
procedure SelectionChanged;
// Âîçâðàùàåò èíäåêñ ñàìîãî âåðõíåãî îòîáðàæàåìîãî ýñêèçà
function GetFirstVisibleIndex: Integer;
// Invalidates all the selected thumbnails
procedure InvalidateSelection;
// Ñòàâèò èëè óáèðàåò âûäåëåíèå ñ ýñêèçà
procedure ToggleSelection(Index: Integer);
function AddToSelection(Index: Integer): Boolean;
procedure RemoveFromSelection(Index: Integer);
// Ïåðåìåùàåò ItemIndex íà íîâîå ìåñòî, íå òðîãàÿ âûäåëåíèÿ. Ïðè bUpdateStreamSelStart=True òàêæå îáíîâëÿåò
// FStreamSelStart. Ïðè bScrollIntoView=True òàêæå ïðîêðó÷èâàåò ýñêèç â çîíó âèäèìîñòè
procedure MoveItemIndex(iNewIndex: Integer; bUpdateStreamSelStart, bScrollIntoView: Boolean);
// Âûçûâàåò OnStartViewMode
procedure DoStartViewMode;
// Íàñòðàèâàåò ScrollBar
procedure UpdateScrollBar;
// Âûäåëÿåò äèàïàçîí èíäåêñîâ ýñêèçîâ è ñäâèãàåò ItemIndex â idxEnd. Ïðè bRectangular=False âûäåëÿåò ýñêèçû ïîäðÿä
// ïî èõ èíäåêñàì, ïðè bRectangular=True âûäåëÿåò ïðÿìîóãîëüíûé áëîê
procedure SelectRange(idxStart, idxEnd: Integer; bRectangular: Boolean);
// Ðàáîòà ñ ðàìêîé ãðóïïîâîãî âûäåëåíèÿ (marquee)
procedure PaintMarquee;
procedure MarqueingStart;
procedure MarqueingEnd;
// Îòðèñîâûâàåò ìàðêåð âñòàâêè ïåðåòàñêèâàåìûõ ýñêèçîâ. Åñëè bInvalidate=True, ïîñëå îòðèñîâêè ñáðàñûâàåò iIndex â
// -1 è bLower â False
procedure DragDrawInsertionPoint(var Coord: TViewerInsertionCoord; bInvalidate: Boolean);
// Íàñòðàèâàåò âñïëûâàþùèå îïèñàíèÿ ýñêèçîâ â âèäå Hint
procedure AdjustTooltip(ix, iy: Integer);
// Message handlers
procedure CMDrag(var Msg: TCMDrag); message CM_DRAG;
procedure CMFontChanged(var Msg: TMessage); message CM_FONTCHANGED;
procedure CMInvalidate(var Msg: TMessage); message CM_INVALIDATE;
procedure CMMouseWheel(var Msg: TCMMouseWheel); message CM_MOUSEWHEEL;
procedure WMContextMenu(var Msg: TWMContextMenu); message WM_CONTEXTMENU;
procedure WMEraseBkgnd(var Msg: TWMEraseBkgnd); message WM_ERASEBKGND;
procedure WMGetDlgCode(var Msg: TWMGetDlgCode); message WM_GETDLGCODE;
procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS;
procedure WMNCPaint(var Msg: TWMNCPaint); message WM_NCPAINT;
procedure WMSetFocus(var Msg: TWMSetFocus); message WM_SETFOCUS;
procedure WMVScroll(var Msg: TWMVScroll); message WM_VSCROLL;
procedure WMWindowPosChanged(var Msg: TWMWindowPosChanged); message WM_WINDOWPOSCHANGED;
// Prop handlers
function GetDropTargetIndex: Integer;
function GetIDSelected(iID: Integer): Boolean;
function GetIndexSelected(iIndex: Integer): Boolean;
function GetSelectedIndexes(Index: Integer): Integer;
function GetThumbCornerDetails(Corner: TThumbCorner): TThumbCornerDetail;
function GetUpdateLocked: Boolean;
procedure SetBorderStyle(Value: TBorderStyle);
procedure SetDisplayMode(Value: TThumbViewerDisplayMode);
procedure SetItemIndex(Value: Integer);
procedure SetShowThumbTooltips(Value: Boolean);
procedure SetThumbBackBorderColor(Value: TColor);
procedure SetThumbBackBorderStyle(Value: TThumbBackBorderStyle);
procedure SetThumbBackColor(Value: TColor);
procedure SetThumbCornerDetails(Corner: TThumbCorner; const Value: TThumbCornerDetail);
procedure SetThumbFocusRectColor(Value: TColor);
procedure SetThumbFontColor(Value: TColor);
procedure SetThumbnailSize(const Value: TSize);
procedure SetThumbShadowBlurRadius(Value: Integer);
procedure SetThumbShadowColor(Value: TColor);
procedure SetThumbShadowOffset(const Value: TPoint);
procedure SetThumbShadowOpacity(Value: Byte);
procedure SetThumbShadowVisible(Value: Boolean);
procedure SetThumbTooltipProps(Value: TPicProperties);
procedure SetTopOffset(Value: Integer);
protected
procedure MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
procedure MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer); override;
procedure DblClick; override;
procedure DragOver(Source: TObject; X, Y: Integer; State: TDragState; var Accept: Boolean); override;
procedure CreateParams(var Params: TCreateParams); override;
procedure CreateWnd; override;
procedure WndProc(var Msg: TMessage); override;
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
procedure Paint; override;
procedure Resize; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
// Îáíîâëÿåò îòîáðàæàåìûé ñïèñîê èçîáðàæåíèé
procedure ReloadPicList(APicList: IPhoaPicList);
// Ñîçäà¸ò îáúåêò IThumbnailViewerDisplayData, ñîõðàíÿåò â íåãî òåêóùèå ïàðàìåòðû îòîáðàæåíèÿ è âîçâðàùàåò åãî
function SaveDisplay: IThumbnailViewerDisplayData;
// Âîññòàíàâëèâàåò ïàðàìåòðû îòîáðàæåíèÿ èç Data; ïîäðàçóìåâàåòñÿ âîçìîæíîñòü èñïîëüçîâàíèÿ äàííûõ, ïîëó÷åííûõ â
// ðåçóëüòàòå ïðåäûäóùåãî âûçîâà SaveDisplay()
procedure RestoreDisplay(Data: IThumbnailViewerDisplayData);
// Óáèðàåò âûäåëåíèå ñî âñåõ ýñêèçîâ è âîçâðàùàåò True, åñëè îíî áûëî
function ClearSelection: Boolean;
// Âûäåëÿåò âñå ýñêèçû
procedure SelectAll;
// Âîçâðàùàåò ItemIndex â òî÷êå, èëè -1, åñëè òàì íåò ýñêèçà
function ItemAtPos(ix, iy: Integer): Integer;
// Âîçâðàùàåò êîîðäèíàòû ýñêèçà ñ èíäåêñîì Index. Åñëè bAllowInvisible=False, òî âîçâðàùàåò ïóñòîé ïðÿìîóãîëüíèê,
// åñëè ýñêèç íå ïåðåñåêàåòñÿ ñ ClientRect
function ItemRect(Index: Integer; bAllowInvisible: Boolean): TRect;
// Ñòàâèò ýñêèç â î÷åðåäü íà îáíîâëåíèå
procedure InvalidateItem(Index: Integer); overload;
procedure InvalidateItem(Pic: IPhoaPic); overload;
// Ïðîêðó÷èâàåò ñîäåðæèìîå, ÷òîáû áûëî âèäíî ItemIndex
procedure ScrollIntoView;
// Áëîêèðîâêà ïåðåðèñîâêè
procedure BeginUpdate;
procedure EndUpdate;
// Props
property DisplayMode: TThumbViewerDisplayMode read FDisplayMode write SetDisplayMode;
// -- Ôëàã, ðàçðåøàþùèé ïåðåòàñêèâàíèå ýñêèçîâ
property DragEnabled: Boolean read FDragEnabled write FDragEnabled;
// -- Ôëàã, ðàçðåøàþùèé ïåðåñòàíîâêó ýñêèçîâ âíóòðè îêíà ñ ïîìîùüþ Drag'n'Drop. Åñëè ïåðåñòàíîâêà çàïðåùåíà, à
// DragEnabled=True, òî ìîæíî òîëüêî "âûòàñêèâàòü" ýñêèçû íàðóæó
property DragInsideEnabled: Boolean read FDragInsideEnabled write FDragInsideEnabled;
// -- Èíäåêñ ïîñëåäíåãî ìåñòà âñòàâêè ïðè Drag'n'Drop. -1, åñëè íå áûëî ïîäõîäÿùåãî
property DropTargetIndex: Integer read GetDropTargetIndex;
// -- True, åñëè èçîáðàæåíèå ñ çàäàííûì ID âûäåëåíî
property IDSelected[iID: Integer]: Boolean read GetIDSelected;
// -- True, åñëè èçîáðàæåíèå ñ çàäàííûì èíäåêñîì âûäåëåíî
property IndexSelected[iIndex: Integer]: Boolean read GetIndexSelected;
// -- Èíäåêñ ñôîêóñèðîâàííîãî èçîáðàæåíèÿ
property ItemIndex: Integer read FItemIndex write SetItemIndex;
// -- Èíäåêñû âûäåëåííûõ èçîáðàæåíèé â îáùåì ñïèñêå èçîáðàæåíèé viewer'à (Index - èíäåêñ âûäåëåííîãî èçîáðàæåíèÿ,
// 0..SelCount-1)
property SelectedIndexes[Index: Integer]: Integer read GetSelectedIndexes;
// -- Âûäåëåííûå èçîáðàæåíèÿ
property SelectedPics: IPhotoAlbumPicList read FSelectedPics;
// -- Åñëè True, îòîáðàæàåò âñïëûâàþùèå îïèñàíèÿ ýñêèçîâ
property ShowThumbTooltips: Boolean read FShowThumbTooltips write SetShowThumbTooltips;
// -- Ñîñòîÿíèÿ êîíòðîëà
property States: TThumbnailViewerStates read FStates;
// -- Öâåò ðàìêè ôîíà ýñêèçà ïðè ThumbBackBorderStyle=tbbsColor
property ThumbBackBorderColor: TColor read FThumbBackBorderColor write SetThumbBackBorderColor;
// -- Ñòèëü ðàìêè ôîíà ýñêèçà
property ThumbBackBorderStyle: TThumbBackBorderStyle read FThumbBackBorderStyle write SetThumbBackBorderStyle;
// -- Öâåò ôîíà ýñêèçîâ
property ThumbBackColor: TColor read FThumbBackColor write SetThumbBackColor;
// -- Öâåò ðàìêè ñôîêóñèðîâàííîãî ýñêèçà
property ThumbFocusRectColor: TColor read FThumbFocusRectColor write SetThumbFocusRectColor;
// -- Öâåò øðèôòà ýñêèçîâ
property ThumbFontColor: TColor read FThumbFontColor write SetThumbFontColor;
// -- Äàííûå, îòîáðàæàåìûå íà ýñêèçàõ
property ThumbCornerDetails[Corner: TThumbCorner]: TThumbCornerDetail read GetThumbCornerDetails write SetThumbCornerDetails;
// -- Ïàðàìåòðû òåíè ýñêèçà
// ---- Ðàäèóñ ðàçìûâêè
property ThumbShadowBlurRadius: Integer read FThumbShadowBlurRadius write SetThumbShadowBlurRadius;
// ---- Öâåò
property ThumbShadowColor: TColor read FThumbShadowColor write SetThumbShadowColor;
// ---- Ñìåùåíèå
property ThumbShadowOffset: TPoint read FThumbShadowOffset write SetThumbShadowOffset;
// ---- Íåïðîçðà÷íîñòü
property ThumbShadowOpacity: Byte read FThumbShadowOpacity write SetThumbShadowOpacity;
// ---- "Âèäèìîñòü"
property ThumbShadowVisible: Boolean read FThumbShadowVisible write SetThumbShadowVisible;
// -- Äàííûå, îòîáðàæàåìûå íà âñïëûâàþùèõ îïèñàíèÿõ ýñêèçîâ
property ThumbTooltipProps: TPicProperties read FThumbTooltipProps write SetThumbTooltipProps;
// -- Ðàçìåðû ýñêèçîâ
property ThumbnailSize: TSize read FThumbnailSize write SetThumbnailSize;
// -- Ñìåùåíèå âåðõíåãî êðàÿ îêíà îòíîñèòåëüíî íà÷àëà ñïèñêà ýñêèçîâ, â ïèêñåëàõ
property TopOffset: Integer read FTopOffset write SetTopOffset;
// -- True, åñëè FUpdateLock>0
property UpdateLocked: Boolean read GetUpdateLocked;
published
property Align;
property Anchors;
property BevelEdges;
property BevelInner;
property BevelKind default bkNone;
property BevelOuter;
property BiDiMode;
property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle default bsSingle;
property Color default clBtnFace;
property Constraints;
property DragCursor;
property Enabled;
property Font;
property ImeMode;
property ImeName;
property ParentBiDiMode;
property ParentColor default False;
property ParentShowHint;
property PopupMenu;
property ShowHint;
property TabOrder;
property TabStop default True;
property Visible;
property OnContextPopup;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
// -- Ñîáûòèå èçìåíåíèÿ âûäåëåíèÿ âî viewer'å
property OnSelectionChange: TNotifyEvent read FOnSelectionChange write FOnSelectionChange;
property OnStartDock;
property OnStartDrag;
// -- Ñîáûòèå, ïðîèñõîäÿùåå òîãäà, êîãäà íóæíî íà÷àòü ïðîñìîòð èçîáðàæåíèé
property OnStartViewMode: TNotifyEvent read FOnStartViewMode write FOnStartViewMode;
end;
//===================================================================================================================
// Îêîøêî ïîäñêàçêè, ïîääåðæèâàþùåå âûâîä ñòðîê â äâå êîëîíêè (ñòðîêè ðàçäåëÿþòñÿ ñèìâîëîì #9, ïåðâàÿ ñòðîêà
// âûðàâíèâàåòñÿ ïî ëåâîìó êðàþ, âòîðàÿ - ïî ïðàâîìó)
//===================================================================================================================
TPhoAHintWindow = class(TTntHintWindow)
private
// True â ïðîöåññå âûçîâà ActivateHint()
FActivating: Boolean;
// Êîëè÷åñòâî òèêîâ, êîãäà â ïîñëåäíèé ðàç áûëà âûçâàíà ActivateHint()
FLastActive: Cardinal;
// Prop storage
FMonitor: TMonitor;
// Message handlers
procedure CMTextChanged(var Message: TMessage); message CM_TEXTCHANGED;
protected
procedure Paint; override;
public
procedure ActivateHint(Rect: TRect; const AHint: WideString); override;
function CalcHintRect(MaxWidth: Integer; const AHint: WideString; AData: Pointer): TRect; override;
// Props
// -- Ìîíèòîð, íà êîòîðîì îòîáðàæàåòñÿ îêíî. nil äî âûçîâà ActivateHint()
property Monitor: TMonitor read FMonitor;
end;
//===================================================================================================================
// "Óãîëîê" äëÿ èçìåíåíèÿ ðàçìåðîâ ôîðìû
//===================================================================================================================
TSizeGripper = class(TCustomControl)
private
procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;
protected
procedure Paint; override;
procedure SetParent(AParent: TWinControl); override;
public
constructor Create(AOwner: TComponent); override;
end;
// Ñîçäà¸ò íîâûé ýêçåìïëÿð IThumbnailViewerDisplayData
function NewThumbnailViewerDisplayData: IThumbnailViewerDisplayData; overload;
function NewThumbnailViewerDisplayData(SelectedPics: IPhoaPicList; iFocusedID, iTopOffset: Integer): IThumbnailViewerDisplayData; overload;
implementation /////////////////////////////////////////////////////////////////////////////////////////////////////////
uses Math, Themes, TntSysUtils, phUtils;
//===================================================================================================================
// TThumbnailViewer
//===================================================================================================================
function TThumbnailViewer.AddToSelection(Index: Integer): Boolean;
begin
if (Index>=0) and (Index<FItemCount) then begin
FSelectedPics.Add(FPicList[Index], True, Result);
if Result then begin
InvalidateItem(Index);
SelectionChanged;
end;
end else
Result := False;
end;
procedure TThumbnailViewer.AdjustTooltip(ix, iy: Integer);
var idx: Integer;
begin
// Íàñòðàèâàåì Thumbnail Tooltip
if FShowThumbTooltips and (ThumbTooltipProps<>[]) and (GetKeyState(VK_LBUTTON) and $80=0) then idx := ItemAtPos(ix, iy) else idx := -1;
// Åñëè èíäåêñ ýñêèçà, äëÿ êîòîðîãî ïîñëåäíèé ðàç îòîáðàæàëñÿ Tooltip, ïîìåíÿëñÿ
if idx<>FLastTooltipIdx then begin
// Ñêðûâàåì Tooltip, åñëè åñòü
Application.CancelHint;
// Ñòðîèì îïèñàíèå (äîáàâëÿåì ïàëêó, ÷òîáû â StatusBar íè÷åãî íå ïîïàäàëî)
if idx<0 then Hint := '' else Hint := GetPicPropStrs(FPicList[idx], FThumbTooltipProps, ':'#9, #13)+'|';
FLastTooltipIdx := idx;
end;
end;
procedure TThumbnailViewer.BeginUpdate;
begin
// if FUpdateLock=0 then Perform(WM_SETREDRAW, 0, 0);
Inc(FUpdateLock);
end;
procedure TThumbnailViewer.CalcFontParams;
var Cnv: TCanvas;
begin
// Íàõîäèì âûñîòó ñòðîêè òåêñòà
Cnv := TCanvas.Create;
try
Cnv.Handle := GetDC(0);
try
Cnv.Font.Assign(Font);
FTextLineHeight := Cnv.TextHeight('Wg');
FFontParamsValid := True;
finally
ReleaseDC(0, Cnv.Handle);
Cnv.Handle := 0;
end;
finally
Cnv.Free;
end;
end;
function TThumbnailViewer.ClearSelection: Boolean;
begin
// Åñëè åñòü âûäåëåíèå
Result := FSelectedPics.Count>0;
if Result then begin
InvalidateSelection;
FSelectedPics.Clear;
SelectionChanged;
end;
end;
procedure TThumbnailViewer.CMDrag(var Msg: TCMDrag);
begin
if Msg.DragMessage in [dmDragDrop, dmDragCancel] then DragDrawInsertionPoint(FOldDragTargetCoord, True);
inherited;
end;
procedure TThumbnailViewer.CMFontChanged(var Msg: TMessage);
begin
FFontParamsValid := False;
end;
procedure TThumbnailViewer.CMInvalidate(var Msg: TMessage);
begin
if HandleAllocated then InvalidateRect(Handle, nil, True);
end;
procedure TThumbnailViewer.CMMouseWheel(var Msg: TCMMouseWheel);
var iAmount: Integer;
begin
inherited;
if Msg.Result=0 then begin
Msg.Result := 1;
// Âûñîòà ñòðîêè * êîëè÷åñòâî ùåë÷êîâ ïðîêðóòêè
iAmount := FItemSize.cy*(Msg.WheelDelta div WHEEL_DELTA);
// Åñëè íàæàò Ctrl - ñêðîëëèì ñðàçó íà âèäèìîå ÷èñëî ñòðîê
if ssCtrl in Msg.ShiftState then iAmount := iAmount*FVisibleRows;
// Ñêðîëëèì
TopOffset := TopOffset-iAmount;
end;
end;
constructor TThumbnailViewer.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
ControlStyle := [csCaptureMouse, csClickEvents, csOpaque, csDoubleClicks, csReplicatable];
Width := 100;
Height := 100;
TabStop := True;
ParentColor := False;
Color := clBtnFace;
FBorderStyle := bsSingle;
FColCount := 1;
FNoMoveItemIndex := -1;
FSelectedPics := NewPhotoAlbumPicList(True);
FThumbBackBorderColor := clGray;
FThumbBackBorderStyle := tbbsXP;
FThumbBackColor := clBtnFace;
FThumbFocusRectColor := clHighlight;
FThumbFontColor := clWindowText;
FThumbnailSize.cx := 100;
FThumbnailSize.cy := 100;
FThumbShadowBlurRadius := 40;
FThumbShadowColor := clBlack;
FThumbShadowOffset := Point(7, 7);
FThumbShadowOpacity := 140;
FThumbShadowVisible := True;
end;
procedure TThumbnailViewer.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
with Params do begin
WindowClass.style := WindowClass.style and not (CS_HREDRAW or CS_VREDRAW);
Style := Style or WS_VSCROLL;
if FBorderStyle=bsSingle then begin
Style := Style and not WS_BORDER;
ExStyle := ExStyle or WS_EX_CLIENTEDGE;
end;
end;
end;
procedure TThumbnailViewer.CreateWnd;
var iw, ih: Integer;
begin
iw := Width;
ih := Height;
inherited CreateWnd;
SetWindowPos(Handle, 0, Left, Top, iw, ih, SWP_NOZORDER or SWP_NOACTIVATE);
end;
procedure TThumbnailViewer.DblClick;
begin
DoStartViewMode;
end;
destructor TThumbnailViewer.Destroy;
begin
FSelectedPics := nil;
FPicList := nil;
FBuffer.Free;
FThumbShadow.Free;
FPicList := nil;
inherited Destroy;
end;
procedure TThumbnailViewer.DoStartViewMode;
begin
if Assigned(FOnStartViewMode) then FOnStartViewMode(Self);
end;
procedure TThumbnailViewer.DragDrawInsertionPoint(var Coord: TViewerInsertionCoord; bInvalidate: Boolean);
var
dc: HDC;
hp, hOld: HPEN;
p: TPoint;
r: TRect;
bLower: Boolean;
begin
if Coord.iIndex>=0 then begin
// Íàõîäèì ïèêñåëüíûå êîîðäèíàòû. Åñëè bLower, òî ïðåäûäóùåãî ýñêèçà, èíà÷å òåêóùåãî
bLower := (Coord.iIndex mod FColCount=0) and Coord.bLower;
r := ItemRect(Coord.iIndex-iif(bLower, 1, 0), False);
// Åñëè ýñêèç õîòü ñêîëüêî-íèáóäü âèäåí
if not IsRectEmpty(r) then begin
p.x := iif(bLower, r.Right, r.Left);
p.y := r.Top;
// Îòðèñîâûâàåì
dc := GetDCEx(Handle, 0, DCX_CACHE or DCX_CLIPSIBLINGS or DCX_LOCKWINDOWUPDATE);
hp := CreatePen(PS_SOLID, 3, ColorToRGB(Color) xor ColorToRGB(CInsertionPoint));
hOld := SelectObject(dc, hp);
SetROP2(dc, R2_XORPEN);
MoveToEx(dc, p.x, p.y, nil);
LineTo (dc, p.x, p.y+FItemSize.cy);
MoveToEx(dc, p.x-3, p.y, nil);
LineTo (dc, p.x+3, p.y);
MoveToEx(dc, p.x-3, p.y+FItemSize.cy, nil);
LineTo (dc, p.x+3, p.y+FItemSize.cy);
SelectObject(dc, hOld);
DeleteObject(hp);
ReleaseDC(Handle, dc);
end;
// Invalidate coord if needed
if bInvalidate then begin
Coord.iIndex := -1;
Coord.bLower := False;
end;
end;
end;
procedure TThumbnailViewer.DragOver(Source: TObject; X, Y: Integer; State: TDragState; var Accept: Boolean);
var
iCol, iRow, idxSingleSel: Integer;
bLower: Boolean;
// Ïðîêðó÷èâàåò ñïèñîê ýñêèçîâ ââåðõ (bUp=True) èëè âíèç (bUp=False)
procedure DoScroll(bUp: Boolean);
begin
// Ñòèðàåì ñòàðîå ìåñòî âñòàâêè
DragDrawInsertionPoint(FOldDragTargetCoord, True);
// Ïðîêðó÷èâàåì
TopOffset := TopOffset+iif(bUp, -20, 20);
Update;
end;
begin
if (Source=Self) and FDragInsideEnabled then begin
FDragTargetCoord.iIndex := -1;
FDragTargetCoord.bLower := False;
// Åñëè âõîäèì/íàõîäèìñÿ â êîíòðîëå
if PtInRect(ClientRect, Point(x, y)) then begin
// Åñëè ó âåðõíåé èëè íèæíåé ãðàíèö îêíà, ìîòàåì
if (y<IDragScrollAreaMargin) or (y>=ClientHeight-IDragScrollAreaMargin) then DoScroll(y<IDragScrollAreaMargin);
// Îïðåäåëÿåì ìåñòî âñòàâêè
if FItemCount>0 then begin
// Íàõîäèì ñòîëáåö (ñ îêðóãëåíèåì)
iCol := Trunc(x/FItemSize.cx+0.5);
// Åñëè ñïðàâà îò ýñêèçîâ, âêëþ÷àåì ðåæèì bLower è óñòàíàâëèâàåì èíäåêñ íà ýñêèç â íà÷àëå ñëåäóþùåé ñòðîêè
bLower := iCol>=FColCount;
if bLower then iCol := FColCount;
// Íàõîäèì ñòðîêó (èíäåêñ ýñêèçà â íà÷àëå ñòðîêè)
iRow := ((y+FTopOffset) div FItemSize.cy)*FColCount;
// Åñëè ñòðîêà ñîäåðæèò ýñêèçû
if iRow<FItemCount then begin
FDragTargetCoord.iIndex := iRow+iCol;
// Åñëè óêàçûâàåò çà ïîñëåäíèé ýñêèç - íàäî âêëþ÷èòü bLower
if FDragTargetCoord.iIndex>=FItemCount then begin
FDragTargetCoord.iIndex := FItemCount;
bLower := True;
end;
FDragTargetCoord.bLower := bLower;
end;
end;
end;
// Åñëè èçìåíèëîñü ïîëîæåíèå ìàðêåðà - îòðèñîâûâàåì åãî
if (FDragTargetCoord.iIndex<>FOldDragTargetCoord.iIndex) or (FDragTargetCoord.bLower<>FOldDragTargetCoord.bLower) then begin
DragDrawInsertionPoint(FOldDragTargetCoord, False);
DragDrawInsertionPoint(FDragTargetCoord, False);
FOldDragTargetCoord := FDragTargetCoord;
end;
// Drop âîçìîæåí, åñëè åñòü íîðìàëüíàÿ êîîðäèíàòà âñòàâêè, è ïåðåòàñêèâàþòñÿ íå âñå ðàçîì, è íå åäèíñòâåííîå
// èçîáðàæåíèå èëè ìåñòî âñòàâêè íå ñîâïàäàåò ñ ïîëîæåíèåì ýòîãî èçîáðàæåíèÿ
Accept := (FDragTargetCoord.iIndex>=0) and (FSelectedPics.Count<FItemCount);
if Accept and (FSelectedPics.Count=1) then begin
idxSingleSel := SelectedIndexes[0];
Accept := (idxSingleSel<>FDragTargetCoord.iIndex) and (idxSingleSel<>FDragTargetCoord.iIndex-1);
end;
end else
inherited DragOver(Source, X, Y, State, Accept);
end;
procedure TThumbnailViewer.EndUpdate;
begin
if FUpdateLock>0 then Dec(FUpdateLock);
if FUpdateLock=0 then begin
// Perform(WM_SETREDRAW, 1, 0);
if tvsLayoutChangePending in FStates then LayoutChanged;
if tvsSelectionChangePending in FStates then SelectionChanged;
end;
end;
function TThumbnailViewer.GetDropTargetIndex: Integer;
begin
Result := FDragTargetCoord.iIndex;
end;
function TThumbnailViewer.GetFirstVisibleIndex: Integer;
begin
Result := ItemAtPos(0, 0);
end;
function TThumbnailViewer.GetIDSelected(iID: Integer): Boolean;
begin
Result := FSelectedPics.IndexOfID(iID)>=0;
end;
function TThumbnailViewer.GetIndexSelected(iIndex: Integer): Boolean;
begin
Result := FSelectedPics.IndexOfID(FPicList[iIndex].ID)>=0;
end;
function TThumbnailViewer.GetSelectedIndexes(Index: Integer): Integer;
begin
Result := FPicList.IndexOfID(FSelectedPics[Index].ID);
end;
function TThumbnailViewer.GetThumbCornerDetails(Corner: TThumbCorner): TThumbCornerDetail;
begin
Result := FThumbCornerDetails[Corner];
end;
function TThumbnailViewer.GetUpdateLocked: Boolean;
begin
Result := FUpdateLock>0;
end;
function TThumbnailViewer.GetValidTopOffset(iOffset: Integer): Integer;
begin
Result := Max(0, Min(iOffset, FVRange-ClientHeight));
end;
procedure TThumbnailViewer.InvalidateItem(Index: Integer);
var r: TRect;
begin
if (Index>=0) and (Index<FItemCount) and HandleAllocated then begin
r := ItemRect(Index, False);
if not IsRectEmpty(r) then InvalidateRect(Handle, @r, False);
end;
end;
procedure TThumbnailViewer.InvalidateItem(Pic: IPhoaPic);
begin
InvalidateItem(FPicList.IndexOfID(Pic.ID));
end;
procedure TThumbnailViewer.InvalidateSelection;
var i: Integer;
begin
for i := 0 to FSelectedPics.Count-1 do InvalidateItem(FSelectedPics[i]);
end;
function TThumbnailViewer.ItemAtPos(ix, iy: Integer): Integer;
var iCol: Integer;
begin
Result := -1;
if FItemCount>0 then begin
iCol := ix div FItemSize.cx;
if iCol<FColCount then begin
Result := ((iy+FTopOffset) div FItemSize.cy)*FColCount+iCol;
if Result>=FItemCount then Result := -1;
end;
end;
end;
function TThumbnailViewer.ItemRect(Index: Integer; bAllowInvisible: Boolean): TRect;
var ix, iy: Integer;
begin
FillChar(Result, SizeOf(Result), 0);
if (Index>=0) and (Index<FItemCount) then begin
ix := (Index mod FColCount)*FItemSize.cx;
iy := (Index div FColCount)*FItemSize.cy-FTopOffset;
if bAllowInvisible or ((iy+FItemSize.cy>0) and (iy<ClientHeight)) then Result := Rect(ix, iy, ix+FItemSize.cx, iy+FItemSize.cy);
end;
end;
procedure TThumbnailViewer.KeyDown(var Key: Word; Shift: TShiftState);
// Âîçâðàùàåò ItemIndex, êîòîðûé äîëæåí áûë áû áûòü ïðè "ïðîñòîì" íàæàòèè íà êëàâèøó (áåç Shift, Ctrl etc). Ïðè
// bAllowLRBoundaryCross=False ñòðåëêè âëåâî-âïðàâî íå ìîãóò "ïåðåéòè" ÷åðåç âåðòèêàëüíûå ïðàâóþ/ëåâóþ ãðàíèöû
// ñåòêè ýñêèçîâ (íà ñëåäóþùóþ/ïðåäûäóùóþ ñòðîêó)
function GetItemIndexForKey(bAllowLRBoundaryCross: Boolean): Integer;
begin
Result := FItemIndex;
case Key of
VK_UP: Dec(Result, FColCount);
VK_DOWN: Inc(Result, FColCount);
VK_LEFT: if bAllowLRBoundaryCross or (Result mod FColCount>0) then Dec(Result);
VK_RIGHT: if bAllowLRBoundaryCross or (Result mod FColCount<FColCount-1) then Inc(Result);
VK_HOME: Result := 0;
VK_END: Result := FItemCount-1;
VK_PRIOR: Dec(Result, FVisibleItems);
VK_NEXT: Inc(Result, FVisibleItems);
end;
// Êîððåêòèðóåì ðåçóëüòàò (åñëè FItemCount=0, òî òîëüêî â ýòîì ñëó÷àå Result áóäåò -1)
if Result>=FItemCount then Result := FItemCount-1
else if Result<0 then Result := 0;
end;
begin
case Key of
// Enter - âõîäèì â ðåæèì ïðîñìîòðà
VK_RETURN: if Shift=[] then DoStartViewMode;
// Ïðîáåë - âêëþ÷àåì âûäåëåíèå; Ctrl+Ïðîáåë - ïåðåêëþ÷àåì âûäåëåíèå
VK_SPACE:
if Shift=[] then AddToSelection(FItemIndex)
else if Shift=[ssCtrl] then ToggleSelection(FItemIndex);
// Ñòðåëêè - îáðàáàòûâàåì äâèæåíèÿ
VK_UP, VK_DOWN, VK_LEFT, VK_RIGHT, VK_HOME, VK_END, VK_PRIOR, VK_NEXT: begin
// Áåç ìîäèôèêàòîðîâ èëè ñ Shift, íî íåò ïîòî÷íîãî âûäåëåíèÿ
if (Shift=[]) or ((Shift=[ssShift]) and (FStreamSelStart<0)) then
ItemIndex := GetItemIndexForKey(True)
// Íàæàò Shift - ñîçäà¸ì ïîòî÷íîå âûäåëåíèå, Shift+Alt - ïðÿìîóãîëüíîå âûäåëåíèå
else if (Shift=[ssShift]) or (Shift=[ssShift, ssAlt]) then
SelectRange(FStreamSelStart, GetItemIndexForKey(not (ssAlt in Shift)), ssAlt in Shift)
// Íàæàò Ctrl - äâèãàåì òîëüêî ItemIndex, íå ìåíÿÿ âûäåëåíèÿ
else if Shift=[ssCtrl] then
MoveItemIndex(GetItemIndexForKey(True), True, True);
end;
end;
end;
procedure TThumbnailViewer.LayoutChanged;
var iPrevColCount, iPrevTopOffset: Integer;
begin
if not HandleAllocated then Exit;
// Åñëè îáíîâëåíèÿ çàáëîêèðîâàíû, ïðîñòî âçâîäèì ôëàã èçìåíåíèÿ
if FUpdateLock>0 then
Include(FStates, tvsLayoutChangePending)
// Èíà÷å ïåðåñ÷èòûâàåì ïàðàìåòðû îòîáðàæåíèÿ
else begin
// Ñáðàñûâàåì Tooltip/Hint
FLastTooltipIdx := -1;
Hint := '';
// Ñîõðàíÿåì ñòàðûå ïàðàìåòðû
iPrevColCount := FColCount;
iPrevTopOffset := FTopOffset;
// Åñëè ïàðàìåòðû øðèôòà íå âàëèäíû, èíèöèàëèçèðóåì èõ
if not FFontParamsValid then CalcFontParams;
// Íàõîäèì ðàçìåðû ÿ÷åéêè è êîëè÷åñòâî ñòîëáöîâ
FItemSize := FThumbnailSize;
case FDisplayMode of
tvdmTile: begin
// -- Ïðèáàâëÿåì îòñòóïû íà êðàÿõ ýñêèçà
Inc(FItemSize.cx, IThumbMarginH*2+IThumbPaddingL+IThumbPaddingR);
Inc(FItemSize.cy, IThumbMarginV*2+IThumbPaddingT+IThumbPaddingB);
// -- Ïðèáàâëÿåì îòñòóïû íà äàííûå èçîáðàæåíèé
if FThumbCornerDetails[tcLeftTop].bDisplay or FThumbCornerDetails[tcRightTop].bDisplay then Inc(FItemSize.cy, FTextLineHeight);
if FThumbCornerDetails[tcLeftBottom].bDisplay or FThumbCornerDetails[tcRightBottom].bDisplay then Inc(FItemSize.cy, FTextLineHeight);
// Ñ÷èòàåì êîëè÷åñòâî ñòîëáöîâ
FColCount := Max(1, ClientWidth div FItemSize.cx);
end;
else {tvdmDetail} begin
FColCount := 1;
FItemSize.cx := Max(FThumbnailSize.cx+IThumbPaddingL+IThumbPaddingR, ClientWidth);
Inc(FItemSize.cy, IThumbMarginV*2+IThumbPaddingT+IThumbPaddingB);
end;
end;
// Îáíîâëÿåì çíà÷åíèÿ
FVisibleRows := ClientHeight div FItemSize.cy;
FVisibleItems := FVisibleRows*FColCount;
FVRange := Ceil(FItemCount/FColCount)*FItemSize.cy;
FTopOffset := GetValidTopOffset(FTopOffset);
// Îáíîâëÿåì îòîáðàæàåìûå äàííûå ïðè íàëè÷èè èçìåíåíèé
if (tvsLayoutChangePending in FStates) or (FColCount<>iPrevColCount) or (FTopOffset<>iPrevTopOffset) then Invalidate;
UpdateScrollBar;
// Îáíîâëÿåì ôëàãè ñîñòîÿíèÿ
FStates := FStates-[tvsLayoutChangePending];
end;
end;
procedure TThumbnailViewer.MarqueingEnd;
var
i: Integer;
r, rItem: TRect;
begin
ReleaseCapture;
FMarqueing := False;
// Ñòèðàåì Marquee
PaintMarquee;
ReleaseDC(Handle, FTempDC);
// Ñîçäà¸ì âûäåëåíèå
BeginUpdate;
try
// Åñëè íå áûë íàæàò Shift, î÷èùàåì Selection (âûäåëÿåì ñ íóëÿ)
if GetKeyState(VK_SHIFT) and $80=0 then ClearSelection;
// Select thumbnails that do intersect with marquee
r := OrderRect(Rect(FStartPos, FMarqueeCur));
for i := GetFirstVisibleIndex to FItemCount-1 do begin
rItem := ItemRect(i, False);
if IsRectEmpty(rItem) then Break;
if RectsOverlap(r, rItem) then AddToSelection(i);
end;
finally
EndUpdate;
end;
end;
procedure TThumbnailViewer.MarqueingStart;
begin
SetCapture(Handle);
FTempDC := GetDCEx(Handle, 0, DCX_CACHE or DCX_CLIPSIBLINGS or DCX_LOCKWINDOWUPDATE);
FMarqueing := True;
FMarqueeCur := FStartPos;
end;
procedure TThumbnailViewer.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var idx: Integer;
begin
SetFocus;
if Button=mbMiddle then Exit;
idx := ItemAtPos(x, y);
FStartPos := Point(x, y);
// Åñëè íàæàò Alt[+Shift] (íî íå Ctrl+Alt) - íà÷èíàåì âûäåëåíèå (marqueing)
if Shift*[ssAlt, ssCtrl]=[ssAlt] then begin
if Button=mbLeft then MarqueingStart;
// Åñëè íàæàò Ctrl
end else if Shift*[ssShift, ssCtrl, ssAlt]=[ssCtrl] then begin
// Åñëè ëåâàÿ êíîïêà - ïåðåêëþ÷àåì âûäåëåíèå ýñêèçà, íà êîòîðîì êëèêíóëè
if Button=mbLeft then begin
ToggleSelection(idx);
MoveItemIndex(idx, True, True);
// Åñëè ïðàâàÿ êíîïêà - ãîòîâèì âûçîâ Shell Context Menu
end else if Button=mbRight then begin
BeginUpdate;
try
ClearSelection;
SetItemIndex(idx);
finally
EndUpdate;
end;
if idx>=0 then begin
FShellCtxMenuOnMouseUp := True;
Exit;
end;
end;
// Åñëè íàæàò Shift - âûäåëÿåì ïîäðÿä èäóùèå ýñêèçû
end else if Shift*[ssShift, ssCtrl, ssAlt]=[ssShift] then
if FStreamSelStart>=0 then SelectRange(FStreamSelStart, idx, False) else SetItemIndex(idx)
// Íå íàæàòî êíîïîê
else if Shift*[ssShift, ssCtrl, ssAlt]=[] then begin
if (idx<0) or not IndexSelected[idx] then begin
SetItemIndex(idx);
FNoMoveItemIndex := -1;
end else if Button=mbLeft then
FNoMoveItemIndex := idx;
if Button=mbLeft then
if idx<0 then MarqueingStart
else if FDragEnabled and (FSelectedPics.Count>0) then FDragPending := True;
end;
inherited MouseDown(Button, Shift, x, y);
end;
procedure TThumbnailViewer.MouseMove(Shift: TShiftState; X, Y: Integer);
begin
// Íàñòðàèâàåì Tooltip
AdjustTooltip(x, y);
// Åñëè ðèñóåì ðàìêó âûäåëåíèÿ
if FMarqueing then begin
PaintMarquee;
FMarqueeCur := Point(Min(Max(x, 0), ClientWidth), y);
PaintMarquee;
// Ïðîâåðÿåì îæèäàíèå Dragging
end else if FDragPending then begin
if (FStartPos.x<>x) or (FStartPos.y<>y) then FNoMoveItemIndex := -1;
if Sqr(FStartPos.x-x)+Sqr(FStartPos.y-y)>9 then begin
FDragPending := False;
// Èíèöèàëèçèðóåì ïåðåìåííûå
FDragTargetCoord.iIndex := -1;
FDragTargetCoord.bLower := False;
FOldDragTargetCoord.iIndex := -1;
FOldDragTargetCoord.bLower := False;
// Íà÷èíàåì Dragging
BeginDrag(True);
end;
end;
inherited MouseMove(Shift, x, y);
end;
procedure TThumbnailViewer.MouseUp(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
// Áûëà ðàìêà ãðóïïîâîãî âûäåëåíèÿ
if FMarqueing then
MarqueingEnd
// Åñëè áûëà íàæàòà ïðàâàÿ êíîïêà âìåñòå ñ Ctrl - âûçûâàåì ñèñòåìíîå êîíòåêñòíîå ìåíþ
else if FShellCtxMenuOnMouseUp then begin
FShellCtxMenuOnMouseUp := False;
if (ssCtrl in Shift) and (FItemIndex>=0) and (FItemIndex=ItemAtPos(x, y)) then ShowFileShellContextMenu(FPicList[FItemIndex].FileName);
Exit;