QGIS API Documentation  3.21.0-Master (909859188c)
qgsmodelviewmousehandles.cpp
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1 /***************************************************************************
2  qgsmodelviewmousehandles.cpp
3  ------------------------
4  begin : March 2020
5  copyright : (C) 2020 by Nyall Dawson
6  email : [email protected]
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
19 #include "qgis.h"
20 #include "qgslogger.h"
21 #include "qgsproject.h"
22 #include "qgsmodelgraphicsview.h"
23 #include "qgsmodelgraphicsscene.h"
25 #include "qgsmodelviewtool.h"
26 #include <QGraphicsSceneHoverEvent>
27 #include <QPainter>
28 #include <QWidget>
29 #include <limits>
30 
32 
33 
34 QgsModelViewMouseHandles::QgsModelViewMouseHandles( QgsModelGraphicsView *view )
35  : QgsGraphicsViewMouseHandles( view )
36  , mView( view )
37 {
38  //listen for selection changes, and update handles accordingly
39  connect( modelScene(), &QGraphicsScene::selectionChanged, this, &QgsModelViewMouseHandles::selectionChanged );
40  setHandleSize( 5 );
41 }
42 
43 QgsModelGraphicsScene *QgsModelViewMouseHandles::modelScene() const
44 {
45  return qobject_cast< QgsModelGraphicsScene * >( mView->scene() );
46 }
47 
48 void QgsModelViewMouseHandles::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
49 {
50  paintInternal( painter, !( modelScene()->flags() & QgsModelGraphicsScene::FlagHideControls ),
51  true, false, option, widget );
52 }
53 
54 void QgsModelViewMouseHandles::selectionChanged()
55 {
56  //listen out for selected items' size and rotation changed signals
57  const QList<QGraphicsItem *> itemList = mView->items();
58  for ( QGraphicsItem *graphicsItem : itemList )
59  {
60  QgsModelComponentGraphicItem *item = dynamic_cast<QgsModelComponentGraphicItem *>( graphicsItem );
61  if ( !item )
62  continue;
63 
64  if ( item->isSelected() )
65  {
66  connect( item, &QgsModelComponentGraphicItem::sizePositionChanged, this, &QgsModelViewMouseHandles::selectedItemSizeChanged );
67  }
68  else
69  {
70  disconnect( item, &QgsModelComponentGraphicItem::sizePositionChanged, this, &QgsModelViewMouseHandles::selectedItemSizeChanged );
71  }
72  }
73 
74  resetStatusBar();
75  updateHandles();
76 }
77 
78 void QgsModelViewMouseHandles::setViewportCursor( Qt::CursorShape cursor )
79 {
80  //workaround qt bug #3732 by setting cursor for QGraphicsView viewport,
81  //rather then setting it directly here
82 
83  if ( qobject_cast< QgsModelViewTool *>( mView->tool() ) )
84  {
85  mView->viewport()->setCursor( cursor );
86  }
87 }
88 
89 QList<QGraphicsItem *> QgsModelViewMouseHandles::sceneItemsAtPoint( QPointF scenePoint )
90 {
91  return modelScene()->items( scenePoint );
92 }
93 
94 QList<QGraphicsItem *> QgsModelViewMouseHandles::selectedSceneItems( bool ) const
95 {
96  QList<QGraphicsItem *> res;
97  const QList<QgsModelComponentGraphicItem *> componentItems = modelScene()->selectedComponentItems();
98  res.reserve( componentItems.size() );
99  for ( QgsModelComponentGraphicItem *item : componentItems )
100  res << item;
101  return res;
102 }
103 
104 QRectF QgsModelViewMouseHandles::itemRect( QGraphicsItem *item ) const
105 {
106  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
107  return componentItem->itemRect();
108  else
109  return QRectF();
110 }
111 
112 QRectF QgsModelViewMouseHandles::storedItemRect( QGraphicsItem *item ) const
113 {
114  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
115  return componentItem->itemRect( true );
116  else
117  return QRectF();
118 }
119 
120 void QgsModelViewMouseHandles::moveItem( QGraphicsItem *item, double deltaX, double deltaY )
121 {
122  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
123  {
124  componentItem->moveComponentBy( deltaX, deltaY );
125  }
126 }
127 
128 void QgsModelViewMouseHandles::previewItemMove( QGraphicsItem *item, double deltaX, double deltaY )
129 {
130  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
131  {
132  componentItem->previewItemMove( deltaX, deltaY );
133  }
134 }
135 
136 void QgsModelViewMouseHandles::setItemRect( QGraphicsItem *item, QRectF rect )
137 {
138  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
139  {
140  componentItem->finalizePreviewedItemRectChange( rect );
141  }
142 }
143 
144 QRectF QgsModelViewMouseHandles::previewSetItemRect( QGraphicsItem *item, QRectF rect )
145 {
146  if ( QgsModelComponentGraphicItem *componentItem = dynamic_cast<QgsModelComponentGraphicItem *>( item ) )
147  {
148  return componentItem->previewItemRectChange( rect );
149  }
150  return rect;
151 }
152 
153 void QgsModelViewMouseHandles::startMacroCommand( const QString &text )
154 {
155  mView->startMacroCommand( text );
156 }
157 
158 void QgsModelViewMouseHandles::endMacroCommand()
159 {
160  mView->endMacroCommand();
161 }
162 
163 QPointF QgsModelViewMouseHandles::snapPoint( QPointF originalPoint, QgsGraphicsViewMouseHandles::SnapGuideMode mode, bool snapHorizontal, bool snapVertical )
164 {
165  bool snapped = false;
166 
167  QPointF snappedPoint;
168  switch ( mode )
169  {
170  case Item:
171  case Point:
172  snappedPoint = mView->snapper()->snapPoint( originalPoint, mView->transform().m11(), snapped, snapHorizontal, snapVertical );
173  break;
174  }
175 
176  return snapped ? snappedPoint : originalPoint;
177 }
178 
179