QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgslayoutviewtoolmoveitemcontent.cpp
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1/***************************************************************************
2 qgslayoutviewtoolmoveitemcontent.cpp
3 ------------------------------------
4 Date : October 2017
5 Copyright : (C) 2017 Nyall Dawson
6 Email : nyall dot dawson at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
18#include "qgslayoutview.h"
19#include "qgslayout.h"
21#include "qgssettings.h"
22#include "qgslayoutundostack.h"
23
25 : QgsLayoutViewTool( view, tr( "Select" ) )
26{
27 setCursor( Qt::ArrowCursor );
28}
29
31{
32 if ( event->button() != Qt::LeftButton )
33 {
34 event->ignore();
35 return;
36 }
37
38 const QList<QGraphicsItem *> itemsAtCursorPos = view()->items( event->pos() );
39 if ( itemsAtCursorPos.isEmpty() )
40 return;
41
42 //find highest non-locked QgsLayoutItem at clicked position
43 //(other graphics items may be higher, e.g., selection handles)
44 for ( QGraphicsItem *graphicsItem : itemsAtCursorPos )
45 {
46 QgsLayoutItem *item = dynamic_cast<QgsLayoutItem *>( graphicsItem );
47 if ( item && !item->isLocked() )
48 {
49 //we've found the highest QgsLayoutItem
50 mMoveContentStartPos = event->layoutPoint();
51 mMoveContentItem = item;
52 mMovingItemContent = true;
53 break;
54 }
55 }
56}
57
59{
60 if ( !mMovingItemContent || !mMoveContentItem )
61 {
62 event->ignore();
63 return;
64 }
65
66 //update item preview
67 mMoveContentItem->setMoveContentPreviewOffset( event->layoutPoint().x() - mMoveContentStartPos.x(),
68 event->layoutPoint().y() - mMoveContentStartPos.y() );
69 mMoveContentItem->update();
70}
71
73{
74 if ( event->button() != Qt::LeftButton || !mMovingItemContent || !mMoveContentItem )
75 {
76 event->ignore();
77 return;
78 }
79
80 //update item preview
81 mMoveContentItem->setMoveContentPreviewOffset( 0, 0 );
82
83 const double moveX = event->layoutPoint().x() - mMoveContentStartPos.x();
84 const double moveY = event->layoutPoint().y() - mMoveContentStartPos.y();
85
86 mMoveContentItem->layout()->undoStack()->beginCommand( mMoveContentItem, tr( "Move Item Content" ) );
87 mMoveContentItem->moveContent( -moveX, -moveY );
88 mMoveContentItem->layout()->undoStack()->endCommand();
89 mMoveContentItem = nullptr;
90 mMovingItemContent = false;
91}
92
94{
95 event->accept();
96
97#if QT_VERSION < QT_VERSION_CHECK(5, 15, 2)
98 QPointF scenePoint = view()->mapToScene( event->pos().x(), event->pos().y() );
99#else
100 const QPointF scenePoint = view()->mapToScene( event->position().x(), event->position().y() );
101#endif
102
103 //select topmost item at position of event
104 QgsLayoutItem *item = layout()->layoutItemAt( scenePoint, true );
105 if ( !item || !item->isSelected() )
106 return;
107
108 const QgsSettings settings;
109 double zoomFactor = settings.value( QStringLiteral( "qgis/zoom_factor" ), 2.0 ).toDouble();
110
111 // "Normal" mouse have an angle delta of 120, precision mouses provide data faster, in smaller steps
112 zoomFactor = 1.0 + ( zoomFactor - 1.0 ) / 120.0 * std::fabs( event->angleDelta().y() );
113
114 if ( event->modifiers() & Qt::ControlModifier )
115 {
116 //holding ctrl while wheel zooming results in a finer zoom
117 zoomFactor = 1.0 + ( zoomFactor - 1.0 ) / 20.0;
118 }
119
120 //calculate zoom scale factor
121 const bool zoomIn = event->angleDelta().y() > 0;
122 const double scaleFactor = ( zoomIn ? zoomFactor : 1 / zoomFactor );
123
124 const QPointF itemPoint = item->mapFromScene( scenePoint );
125 item->layout()->undoStack()->beginCommand( item, tr( "Zoom Item Content" ), QgsLayoutItem::UndoZoomContent );
126 item->zoomContent( scaleFactor, itemPoint );
127 item->layout()->undoStack()->endCommand();
128}
Base class for graphical items within a QgsLayout.
@ UndoZoomContent
Item content zoomed.
virtual void zoomContent(double factor, QPointF point)
Zooms content of item.
bool isLocked() const
Returns true if the item is locked, and cannot be interacted with using the mouse.
virtual void moveContent(double dx, double dy)
Moves the content of the item, by a specified dx and dy in layout units.
virtual void setMoveContentPreviewOffset(double dx, double dy)
Sets temporary offset for the item, by a specified dx and dy in layout units.
const QgsLayout * layout() const
Returns the layout the object is attached to.
void endCommand()
Saves final state of an object and pushes the active command to the undo history.
void beginCommand(QgsLayoutUndoObjectInterface *object, const QString &commandText, int id=0)
Begins a new undo command for the specified object.
A QgsLayoutViewMouseEvent is the result of a user interaction with the mouse on a QgsLayoutView.
QPointF layoutPoint() const
Returns the event point location in layout coordinates.
void wheelEvent(QWheelEvent *event) override
Mouse wheel event for overriding.
QgsLayoutViewToolMoveItemContent(QgsLayoutView *view)
Constructor for QgsLayoutViewToolMoveItemContent.
void layoutMoveEvent(QgsLayoutViewMouseEvent *event) override
Mouse move event for overriding.
void layoutPressEvent(QgsLayoutViewMouseEvent *event) override
Mouse press event for overriding.
void layoutReleaseEvent(QgsLayoutViewMouseEvent *event) override
Mouse release event for overriding.
Abstract base class for all layout view tools.
void setCursor(const QCursor &cursor)
Sets a user defined cursor for use when the tool is active.
QgsLayoutView * view() const
Returns the view associated with the tool.
QgsLayout * layout() const
Returns the layout associated with the tool.
A graphical widget to display and interact with QgsLayouts.
Definition: qgslayoutview.h:50
QgsLayoutItem * layoutItemAt(QPointF position, bool ignoreLocked=false) const
Returns the topmost layout item at a specified position.
Definition: qgslayout.cpp:293
QgsLayoutUndoStack * undoStack()
Returns a pointer to the layout's undo stack, which manages undo/redo states for the layout and it's ...
Definition: qgslayout.cpp:686
This class is a composition of two QSettings instances:
Definition: qgssettings.h:62
QVariant value(const QString &key, const QVariant &defaultValue=QVariant(), Section section=NoSection) const
Returns the value for setting key.