kivio

kivio_canvas.h

00001 /*
00002  * Kivio - Visual Modelling and Flowcharting
00003  * Copyright (C) 2000-2001 theKompany.com & Dave Marotti
00004  *
00005  * This program is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU General Public License
00007  * as published by the Free Software Foundation; either version 2
00008  * of the License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  * GNU General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU General Public License
00016  * along with this program; if not, write to the Free Software
00017  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00018  */
00019 #ifndef __kivio_canvas_h__
00020 #define __kivio_canvas_h__
00021 
00022 #include <qpainter.h>
00023 #include <qbitmap.h>
00024 #include <qlineedit.h>
00025 #include <qwidget.h>
00026 #include <qpoint.h>
00027 #include <qrect.h>
00028 #include <qstring.h>
00029 #include <qptrlist.h>
00030 
00031 #include <KoQueryTrader.h>
00032 #include <KoPoint.h>
00033 #include <KoRect.h>
00034 #include <KoGuides.h>
00035 #include <koffice_export.h>
00036 #include "kivio_intra_stencil_data.h"
00037 
00038 class KivioView;
00039 class KivioCanvas;
00040 class KivioPage;
00041 class KivioDoc;
00042 class KivioRuler;
00043 class KivioGuideLineData;
00044 
00045 class KivioScreenPainter;
00046 class KivioStencil;
00047 
00048 class QPainter;
00049 class QLabel;
00050 class QPixmap;
00051 class QScrollBar;
00052 class QTimer;
00053 
00054 class KoSize;
00055 class KoRect;
00056 
00057 #define YBORDER_WIDTH 50
00058 #define XBORDER_HEIGHT 20
00059 
00060 class KIVIO_EXPORT KivioCanvas : public QWidget
00061 {
00062   Q_OBJECT
00063   friend class KivioView;
00064   public:
00065     KivioCanvas( QWidget*, KivioView*, KivioDoc*, QScrollBar*, QScrollBar* );
00066     ~KivioCanvas();
00067 
00068     int xOffset() const { return m_iXOffset; }
00069     int yOffset() const { return m_iYOffset; }
00070 
00071     const KivioPage* activePage() const;
00072     KivioPage* activePage();
00073     KivioPage* findPage( const QString& _name );
00074 
00075     KivioView* view()const  { return m_pView; }
00076     KivioDoc* doc()const { return m_pDoc; }
00077 
00078     QSize actualSize() const;
00079 
00080     virtual bool event(QEvent*);
00081 
00082     enum RectType { Insert, Rubber };
00083     void startRectDraw( const QPoint &p, RectType t );
00084     void continueRectDraw( const QPoint &p, RectType t );
00085     void endRectDraw();
00086     QRect rect()const { return currRect; }
00087 
00088     void startSpawnerDragDraw( const QPoint &p );
00089     void continueSpawnerDragDraw( const QPoint &p );
00090     void endSpawnerDragDraw();
00091 
00092     void drawSelectedStencilsXOR();
00093     void drawStencilXOR( KivioStencil * );
00094 
00095     KoPoint snapToGrid(const KoPoint&);
00096     KoPoint snapToGuides(const KoPoint&, bool &, bool &);
00097     KoPoint snapToGridAndGuides(const KoPoint&);
00098 
00099     KoPoint mapFromScreen(const QPoint&);
00100     QPoint mapToScreen(const KoPoint&);
00101 
00102     void beginUnclippedSpawnerPainter();
00103     void endUnclippedSpawnerPainter();
00104 
00105     void setViewCenterPoint(const KoPoint &);
00106 
00107     KoRect visibleArea();
00108     void setVisibleArea(KoRect, int margin = 0);
00109     void setVisibleAreaByWidth(KoRect, int margin = 0);
00110     void setVisibleAreaByHeight(KoRect, int margin = 0);
00111 
00112     KoGuides& guideLines() { return m_guides; }
00113 
00114     int pageOffsetX() const { return m_pageOffsetX; }
00115     int pageOffsetY() const { return m_pageOffsetY; }
00116 
00117     void setShowConnectorTargets(bool state) { m_showConnectorTargets = state; }
00118     bool showConnectorTargets() const { return m_showConnectorTargets; }
00119 
00120   signals:
00121     void visibleAreaChanged();
00122 
00123   public slots:
00124     virtual void setUpdatesEnabled(bool);
00125 
00126     void zoomIn(const QPoint&);
00127     void zoomOut(const QPoint&);
00128 
00129     void scrollDx(int dx);
00130     void scrollDy(int dy);
00131 
00132     void scrollV(int value);
00133     void scrollH(int value);
00134 
00135     void updateScrollBars();
00136 
00137     void startPasteMoving();
00138 
00139     void updateAutoGuideLines();
00140 
00141   protected:
00142     virtual void mousePressEvent( QMouseEvent* );
00143     virtual void mouseReleaseEvent( QMouseEvent* );
00144     virtual void mouseMoveEvent( QMouseEvent* );
00145 
00146     virtual void enterEvent( QEvent* );
00147     virtual void leaveEvent( QEvent* );
00148 
00149     virtual void resizeEvent( QResizeEvent* );
00150     virtual void paintEvent( QPaintEvent* );
00151     virtual void wheelEvent( QWheelEvent* );
00152 
00153     virtual void dragEnterEvent( QDragEnterEvent * );
00154     virtual void dragMoveEvent( QDragMoveEvent * );
00155     virtual void dragLeaveEvent( QDragLeaveEvent * );
00156     virtual void dropEvent( QDropEvent * );
00157 
00158     virtual void keyPressEvent( QKeyEvent * );
00159 
00160     void beginUnclippedPainter();
00161     void endUnclippedPainter();
00162 
00163     void paintSelectedXOR();
00164 
00165     void continuePasteMoving(const QPoint &pos);
00166     void endPasteMoving();
00167 
00168   protected slots:
00169     void borderTimerTimeout();
00170 
00171   private:
00172     KivioView* m_pView;
00173     KivioDoc* m_pDoc;
00174 
00175     QScrollBar* m_pVertScrollBar;
00176     QScrollBar* m_pHorzScrollBar;
00177 
00178     int m_iXOffset;
00179     int m_iYOffset;
00180 
00181     QPixmap* m_buffer;
00182 
00183     int m_pScrollX;
00184     int m_pScrollY;
00185     QPointArray gridLines;
00186 
00187     bool oldRectValid;
00188     QRect currRect;
00189     QPoint rectAnchor;
00190     QPainter* unclippedPainter;
00191     QPoint sizePreviewPos;
00192 
00193     KivioScreenPainter* unclippedSpawnerPainter;
00194     KivioIntraStencilData m_dragStencilData;
00195     KivioStencil* m_pDragStencil;
00196 
00197     QTimer* m_borderTimer;
00198 
00199     bool delegateThisEvent;
00200     QPoint lastPoint;
00201 
00202     bool m_pasteMoving;
00203     QPtrList<KoRect> m_lstOldGeometry;
00204     KoPoint m_origPoint;
00205 
00206     KoGuides m_guides;
00207 
00208     int m_pageOffsetX;
00209     int m_pageOffsetY;
00210 
00211     bool m_showConnectorTargets;
00212 };
00213 
00214 #endif
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