src/GraphicsView/GraphicsView_ViewPort.h

   1 // Copyright (C) 2013-2016  CEA/DEN, EDF R&D, OPEN CASCADE
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #ifndef GRAPHICSVIEW_VIEWPORT_H
  21 #define GRAPHICSVIEW_VIEWPORT_H
  22
  23 #include "GraphicsView.h"
  24
  25 #include "GraphicsView_Defs.h"
  26
  27 #include <QGraphicsView>
  28
  29 class QGridLayout;
  30 class QRubberBand;
  31
  32 class GraphicsView_Object;
  33 class GraphicsView_Scene;
  34
  35 /*
  36   Class       : GraphicsView_ViewPort
  37   Description : View port of the graphics view
  38 */
  39 class GRAPHICSVIEW_API GraphicsView_ViewPort : public QGraphicsView
  40 {
  41   Q_OBJECT
  42
  43 public:
  44   class ViewLabel;
  45
  46   enum InteractionFlag
  47   {
  48     // main flags
  49     Dragging               = 0x0001,
  50     Pulling                = 0x0002,
  51     WheelScaling           = 0x0004,
  52     EditFlags              = Dragging | Pulling | WheelScaling,
  53     // advanced flags
  54     TraceBoundingRect      = 0x0008,
  55     DraggingByMiddleButton = 0x0010,
  56     ImmediateContextMenu   = 0x0020,
  57     ImmediateSelection     = 0x0040,
  58     Sketching              = 0x0080
  59   };
  60   Q_DECLARE_FLAGS( InteractionFlags, InteractionFlag )
  61
  62   enum BlockStatus
  63   {
  64     BS_NoBlock   = 0x0000,
  65     BS_Selection = 0x0001, // and highlighting
  66     BS_Dragging  = 0x0002  // currently unused
  67   };
  68
  69   enum ViewLabelPosition
  70   {
  71     VLP_None         = 0,
  72     VLP_TopLeft      = 1,
  73     VLP_TopRight     = 2,
  74     VLP_BottomLeft   = 3,
  75     VLP_BottomRight  = 4
  76   };
  77
  78 public:
  79   GraphicsView_ViewPort( QWidget* theParent );
  80   virtual ~GraphicsView_ViewPort();
  81
  82 public:
  83   GraphicsView_Scene*              getScene() { return myScene; }
  84   void                             addItem( QGraphicsItem* theItem );
  85   bool                             isItemAdded( QGraphicsItem* theItem );
  86   void                             removeItem( QGraphicsItem* theItem );
  87   void                             clearItems();
  88
  89   enum SortType { NoSorting, SelectedFirst, SortByZLevel };
  90   GraphicsView_ObjectList          getObjects( SortType theSortType = NoSorting ) const;
  91
  92   QRectF                           objectsBoundingRect( bool theOnlyVisible = false ) const;
  93
  94   QImage                           dumpView( bool theWholeScene = false,
  95                                              QSizeF theSize = QSizeF() );
  96
  97   bool                             dumpViewToPSFormat(const QString& fileName);
  98
  99 public:
 100   // scene
 101   void                             setSceneGap( double theSceneGap );
 102   void                             setFitAllGap( double theFitAllGap );
 103
 104   // interaction flags
 105   int                              interactionFlags() const;
 106   bool                             hasInteractionFlag( InteractionFlag theFlag );
 107   void                             setInteractionFlag( InteractionFlag theFlag,
 108                                                        bool theIsEnabled = true );
 109   void                             setInteractionFlags( InteractionFlags theFlags );
 110
 111   // view label
 112   void                             setViewLabelPosition( ViewLabelPosition thePosition,
 113                                                          bool theIsForced = false );
 114   void                             setViewLabelText( const QString& theText );
 115
 116   // displaying mouse position (currently, overlaps with view label feature)
 117   void                             setMousePositionEnabled( bool theState );
 118
 119   // background / foreground
 120   QColor                           backgroundColor() const;
 121   void                             setBackgroundColor( const QColor& theColor );
 122
 123   bool                             isForegroundEnabled() const { return myIsForegroundEnabled; }
 124   void                             setForegroundEnabled( bool theState );
 125
 126   QSizeF                           foregroundSize() const { return myForegroundSize; }
 127   void                             setForegroundSize( const QSizeF& theRect );
 128
 129   double                           foregroundMargin() const { return myForegroundMargin; }
 130   void                             setForegroundMargin( double theMargin );
 131
 132   QColor                           foregroundColor() const { return myForegroundColor; }
 133   void                             setForegroundColor( const QColor& theColor );
 134
 135   QColor                           foregroundFrameColor() const { return myForegroundFrameColor; }
 136   void                             setForegroundFrameColor( const QColor& theColor );
 137
 138   double                           foregroundFrameLineWidth() const { return myForegroundFrameLineWidth; }
 139   void                             setForegroundFrameLineWidth( double theLineWidth );
 140
 141   void                             updateForeground();
 142
 143   // grid
 144   void                             setGridEnabled( bool theState );
 145   void                             setGridCellSize( int theCellSize );
 146   void                             setGridLineStyle( int theLineStyle );
 147   void                             setGridLineColor( const QColor& theLineColor );
 148   void                             updateGrid();
 149
 150   // transformation
 151   void                             reset();
 152   void                             pan( double theDX, double theDY );
 153   void                             setCenter( double theX, double theY );
 154   void                             zoom( double theX1, double theY1, double theX2, double theY2 );
 155   void                             fitRect( const QRectF& theRect );
 156   void                             fitSelect();
 157   void                             fitAll( bool theKeepScale = false );
 158   void                             fitWidth();
 159
 160   bool                             isTransforming() const { return myIsTransforming; }
 161
 162   void                             applyTransform();
 163
 164   // block status
 165   BlockStatus                      currentBlock();
 166
 167   // highlighting
 168   virtual void                     highlight( double theX, double theY );
 169   void                             clearHighlighted();
 170
 171   GraphicsView_Object*             getHighlightedObject() const { return myHighlightedObject; }
 172
 173   // selection
 174   virtual int                      select( const QRectF& theRect, bool theIsAppend );
 175   void                             clearSelected();
 176   void                             setSelected( GraphicsView_Object* theObject );
 177
 178   int                              nbSelected() const;
 179   void                             initSelected();
 180   bool                             moreSelected();
 181   bool                             nextSelected();
 182   GraphicsView_Object*             selectedObject();
 183
 184   const GraphicsView_ObjectList&   getSelectedObjects() const { return mySelectedObjects; }
 185
 186   // rectangle selection
 187   void                             startSelectByRect( int x, int y );
 188   void                             drawSelectByRect( int x, int y );
 189   void                             finishSelectByRect();
 190   bool                             isSelectByRect() const;
 191   QRect                            selectionRect();
 192
 193   // sketching
 194   void                             prepareToSketch( bool theStatus );
 195   bool                             isPrepareToSketch();
 196   void                             startSketching( const QPointF& thePoint,
 197                                                    bool theIsPath );
 198   void                             drawSketching( const QPointF& thePoint );
 199   void                             finishSketching( bool theStatus );
 200   bool                             isSketching( bool* theIsPath = 0 ) const;
 201
 202   // dragging
 203   bool                             isDragging() { return myIsDragging; }
 204
 205   // pulling
 206   bool                             startPulling( const QPointF& );
 207   void                             drawPulling( const QPointF& );
 208   void                             finishPulling( bool theStatus );
 209   bool                             isPulling() const { return myIsPulling; }
 210
 211   // other
 212   bool                             cancelCurrentOperation();
 213
 214 public:
 215   static void                      createCursors();
 216   static void                      destroyCursors();
 217   static QCursor*                  getDefaultCursor() { return defCursor; }
 218   static QCursor*                  getHandCursor() { return handCursor; }
 219   static QCursor*                  getPanCursor() { return panCursor; }
 220   static QCursor*                  getPanglCursor() { return panglCursor; }
 221   static QCursor*                  getZoomCursor() { return zoomCursor; }
 222   static QCursor*                  getSketchCursor() { return sketchCursor; }
 223
 224 public slots:
 225   void                             onBoundingRectChanged();
 226
 227 protected slots:
 228   void                             onKeyEvent( QKeyEvent* );
 229   void                             onMouseEvent( QGraphicsSceneMouseEvent* );
 230   void                             onWheelEvent( QGraphicsSceneWheelEvent* );
 231   void                             onContextMenuEvent( QGraphicsSceneContextMenuEvent* );
 232
 233 protected:
 234   virtual void                     scrollContentsBy( int theDX, int theDY );
 235
 236 signals:
 237   void                             vpKeyEvent( QKeyEvent* );
 238   void                             vpMouseEvent( QGraphicsSceneMouseEvent* );
 239   void                             vpWheelEvent( QGraphicsSceneWheelEvent* );
 240   void                             vpContextMenuEvent( QGraphicsSceneContextMenuEvent* );
 241
 242   void                             vpSketchingFinished( QPainterPath );
 243
 244   void                             vpObjectBeforeMoving();
 245   void                             vpObjectAfterMoving( bool );
 246
 247 private:
 248   void                             initialize();
 249   void                             cleanup();
 250
 251   void                             dragObjects( QGraphicsSceneMouseEvent* );
 252
 253 private:
 254   static int                       nCounter;
 255   static QCursor*                  defCursor;
 256   static QCursor*                  handCursor;
 257   static QCursor*                  panCursor;
 258   static QCursor*                  panglCursor;
 259   static QCursor*                  zoomCursor;
 260   static QCursor*                  sketchCursor;
 261
 262 private:
 263   // scene
 264   GraphicsView_Scene*              myScene;
 265   double                           mySceneGap;
 266   double                           myFitAllGap;
 267   GraphicsView_ObjectList          myObjects;
 268
 269   // interaction flags
 270   InteractionFlags                 myInteractionFlags;
 271
 272   // view label
 273   ViewLabel*                       myViewLabel;
 274   ViewLabelPosition                myViewLabelPosition;
 275   QGridLayout*                     myViewLabelLayout;
 276
 277   // displaying mouse position (currently, overlaps with view label feature)
 278   bool                             myIsMousePositionEnabled;
 279
 280   // foreground
 281   bool                             myIsForegroundEnabled;
 282   QSizeF                           myForegroundSize;
 283   double                           myForegroundMargin;
 284   QColor                           myForegroundColor;
 285   QColor                           myForegroundFrameColor;
 286   double                           myForegroundFrameLineWidth;
 287   QGraphicsRectItem*               myForegroundItem;
 288
 289   // grid
 290   bool                             myIsGridEnabled;
 291   int                              myGridCellSize;
 292   int                              myGridLineStyle;
 293   QColor                           myGridLineColor;
 294   QGraphicsPathItem*               myGridItem;
 295
 296   // transformation
 297   bool                             myIsTransforming;
 298   QTransform                       myCurrentTransform;
 299
 300   // highlighting
 301   GraphicsView_Object*             myHighlightedObject;
 302   double                           myHighlightX;
 303   double                           myHighlightY;
 304   bool                             myIsHighlighting;
 305
 306   // selection
 307   GraphicsView_ObjectList          mySelectedObjects;
 308   int                              mySelectionIterator;
 309
 310   // rectangle selection
 311   QRubberBand*                     myRectBand;
 312   QPoint                           myFirstSelectionPoint;
 313   QPoint                           myLastSelectionPoint;
 314   bool                             myAreSelectionPointsInitialized;
 315
 316   // sketching
 317   QGraphicsPathItem*               mySketchingItem;
 318   QPointF                          mySketchingPoint;
 319   bool                             myIsPrepareToSketch;
 320   bool                             myIsSketching;
 321   bool                             myIsSketchingByPath;
 322
 323   // dragging
 324   int                              myIsDragging;
 325   QPointF                          myDragPosition;
 326   bool                             myIsDragPositionInitialized;
 327
 328   // pulling
 329   bool                             myIsPulling;
 330   GraphicsView_Object*             myPullingObject;
 331
 332   // cursor
 333   QCursor                          myStoredCursor;
 334 };
 335
 336 Q_DECLARE_OPERATORS_FOR_FLAGS( GraphicsView_ViewPort::InteractionFlags )
 337
 338 #endif