QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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qgslayoutitemgroupundocommand.cpp
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1/***************************************************************************
2 qgslayoutitemgroupundocommand.cpp
3 ---------------------------
4 begin : 2016-06-09
5 copyright : (C) 2016 by Sandro Santilli
6 email : strk at kbt dot io
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 "qgslayoutitemgroup.h"
20#include "qgslayout.h"
21#include "qgsproject.h"
22
24QgsLayoutItemGroupUndoCommand::QgsLayoutItemGroupUndoCommand( State s, QgsLayoutItemGroup *group, QgsLayout *layout, const QString &text, QUndoCommand *parent )
25 : QUndoCommand( text, parent )
26 , mGroupUuid( group->uuid() )
27 , mLayout( layout )
28 , mState( s )
29{
30 const QList< QgsLayoutItem * > items = group->items();
31 for ( QgsLayoutItem *i : items )
32 {
33 mItemUuids.insert( i->uuid() );
34 }
35}
36
37void QgsLayoutItemGroupUndoCommand::redo()
38{
39 if ( mFirstRun )
40 {
41 mFirstRun = false;
42 return;
43 }
44 switchState();
45}
46
47void QgsLayoutItemGroupUndoCommand::undo()
48{
49 if ( mFirstRun )
50 {
51 mFirstRun = false;
52 return;
53 }
54 switchState();
55}
56
57void QgsLayoutItemGroupUndoCommand::switchState()
58{
59 if ( mState == Grouped )
60 {
61 // ungroup
62 QgsLayoutItemGroup *group = dynamic_cast< QgsLayoutItemGroup * >( mLayout->itemByUuid( mGroupUuid ) );
63 Q_ASSERT_X( group, "QgsLayoutItemGroupUndoCommand::switchState", "Could not find group" );
64 group->removeItems();
65 mLayout->removeLayoutItemPrivate( group );
66 mState = Ungrouped;
67 }
68 else //Ungrouped
69 {
70 // find group by uuid...
71 QgsLayoutItemGroup *group = dynamic_cast< QgsLayoutItemGroup * >( mLayout->itemByUuid( mGroupUuid ) );
72 if ( !group )
73 {
74 group = new QgsLayoutItemGroup( mLayout );
75 mLayout->addLayoutItemPrivate( group );
76 }
77
78 for ( const QString &childUuid : std::as_const( mItemUuids ) )
79 {
80 QgsLayoutItem *childItem = mLayout->itemByUuid( childUuid );
81 group->addItem( childItem );
82 }
83
84 mState = Grouped;
85 }
86 mLayout->project()->setDirty( true );
87}
A container for grouping several QgsLayoutItems.
void removeItems()
Removes all items from the group (but does not delete them).
void addItem(QgsLayoutItem *item)
Adds an item to the group.
QList< QgsLayoutItem * > items() const
Returns a list of items contained by the group.
Base class for graphical items within a QgsLayout.
Base class for layouts, which can contain items such as maps, labels, scalebars, etc.
Definition qgslayout.h:50