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qgslayoutviewtoolselect.cpp
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qgslayoutviewtoolselect.cpp
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/***************************************************************************
qgslayoutviewtoolselect.cpp
---------------------------
Date : July 2017
Copyright : (C) 2017 Nyall Dawson
Email : nyall dot dawson at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgslayoutviewtoolselect.h"
#include "qgslayoutviewmouseevent.h"
#include "qgslayoutview.h"
#include "qgslayout.h"
#include "qgslayoutitempage.h"
#include "qgslayoutmousehandles.h"
#include "qgslayoutitemgroup.h"
QgsLayoutViewToolSelect::QgsLayoutViewToolSelect( QgsLayoutView *view )
: QgsLayoutViewTool( view, tr( "Select" ) )
{
setCursor( Qt::ArrowCursor );
mRubberBand.reset( new QgsLayoutViewRectangularRubberBand( view ) );
mRubberBand->setBrush( QBrush( QColor( 224, 178, 76, 63 ) ) );
mRubberBand->setPen( QPen( QBrush( QColor( 254, 58, 29, 100 ) ), 0, Qt::DotLine ) );
}
QgsLayoutViewToolSelect::~QgsLayoutViewToolSelect()
{
if ( mMouseHandles )
{
// want to force them to be removed from the scene
if ( mMouseHandles->scene() )
mMouseHandles->scene()->removeItem( mMouseHandles );
mMouseHandles->deleteLater();
}
}
void QgsLayoutViewToolSelect::layoutPressEvent( QgsLayoutViewMouseEvent *event )
{
if ( mMouseHandles->shouldBlockEvent( event ) )
{
//swallow clicks while dragging/resizing items
return;
}
if ( mMouseHandles->isVisible() )
{
//selection handles are being shown, get mouse action for current cursor position
QgsLayoutMouseHandles::MouseAction mouseAction = mMouseHandles->mouseActionForScenePos( event->layoutPoint() );
if ( mouseAction != QgsLayoutMouseHandles::MoveItem
&& mouseAction != QgsLayoutMouseHandles::NoAction
&& mouseAction != QgsLayoutMouseHandles::SelectItem )
{
//mouse is over a resize handle, so propagate event onward
event->ignore();
return;
}
}
if ( event->button() != Qt::LeftButton )
{
event->ignore();
return;
}
QgsLayoutItem *selectedItem = nullptr;
QgsLayoutItem *previousSelectedItem = nullptr;
QList<QgsLayoutItem *> selectedItems = layout()->selectedLayoutItems();
if ( event->modifiers() & Qt::ControlModifier )
{
//CTRL modifier, so we are trying to select the next item below the current one
//first, find currently selected item
if ( !selectedItems.isEmpty() )
{
previousSelectedItem = selectedItems.at( 0 );
}
}
if ( previousSelectedItem )
{
//select highest item just below previously selected item at position of event
selectedItem = layout()->layoutItemAt( event->layoutPoint(), previousSelectedItem, true );
//if we didn't find a lower item we'll use the top-most as fall-back
//this duplicates mapinfo/illustrator/etc behavior where ctrl-clicks are "cyclic"
if ( !selectedItem )
{
selectedItem = layout()->layoutItemAt( event->layoutPoint(), true );
}
}
else
{
//select topmost item at position of event
selectedItem = layout()->layoutItemAt( event->layoutPoint(), true );
}
// if selected item is in a group, we actually get the top-level group it's part of
QgsLayoutItemGroup *group = selectedItem ? selectedItem->parentGroup() : nullptr;
while ( group && group->parentGroup() )
{
group = group->parentGroup();
}
if ( group )
selectedItem = group;
if ( !selectedItem )
{
//not clicking over an item, so start marquee selection
mIsSelecting = true;
mMousePressStartPos = event->pos();
mRubberBand->start( event->layoutPoint(), Qt::KeyboardModifiers() );
return;
}
if ( ( event->modifiers() & Qt::ShiftModifier ) && ( selectedItem->isSelected() ) )
{
//SHIFT-clicking a selected item deselects it
selectedItem->setSelected( false );
//Check if we have any remaining selected items, and if so, update the item panel
const QList<QgsLayoutItem *> selectedItems = layout()->selectedLayoutItems();
if ( !selectedItems.isEmpty() )
{
emit itemFocused( selectedItems.at( 0 ) );
}
else
{
emit itemFocused( nullptr );
}
}
else
{
if ( ( !selectedItem->isSelected() ) && //keep selection if an already selected item pressed
!( event->modifiers() & Qt::ShiftModifier ) ) //keep selection if shift key pressed
{
layout()->setSelectedItem( selectedItem ); // clears existing selection
}
else
{
selectedItem->setSelected( true );
}
event->ignore();
emit itemFocused( selectedItem );
}
}
void QgsLayoutViewToolSelect::layoutMoveEvent( QgsLayoutViewMouseEvent *event )
{
if ( mIsSelecting )
{
mRubberBand->update( event->layoutPoint(), Qt::KeyboardModifiers() );
}
else
{
event->ignore();
}
}
void QgsLayoutViewToolSelect::layoutReleaseEvent( QgsLayoutViewMouseEvent *event )
{
if ( event->button() != Qt::LeftButton && mMouseHandles->shouldBlockEvent( event ) )
{
//swallow clicks while dragging/resizing items
return;
}
if ( !mIsSelecting || event->button() != Qt::LeftButton )
{
event->ignore();
return;
}
mIsSelecting = false;
bool wasClick = !isClickAndDrag( mMousePressStartPos, event->pos() );
// important -- we don't pass the event modifiers here, because we use them for a different meaning!
// (modifying how the selection interacts with the items, rather than modifying the selection shape)
QRectF rect = mRubberBand->finish( event->layoutPoint() );
bool subtractingSelection = false;
if ( event->modifiers() & Qt::ShiftModifier )
{
//shift modifier means adding to selection, nothing required here
}
else if ( event->modifiers() & Qt::ControlModifier )
{
//control modifier means subtract from current selection
subtractingSelection = true;
}
else
{
//not adding to or removing from selection, so clear current selection
whileBlocking( layout() )->deselectAll();
}
//determine item selection mode, default to intersection
Qt::ItemSelectionMode selectionMode = Qt::IntersectsItemShape;
if ( event->modifiers() & Qt::AltModifier )
{
//alt modifier switches to contains selection mode
selectionMode = Qt::ContainsItemShape;
}
//find all items in rect
QList<QGraphicsItem *> itemList;
if ( wasClick )
itemList = layout()->items( rect.center(), selectionMode );
else
itemList = layout()->items( rect, selectionMode );
QgsLayoutItemPage *focusedPaperItem = nullptr;
for ( QGraphicsItem *item : std::as_const( itemList ) )
{
QgsLayoutItem *layoutItem = dynamic_cast<QgsLayoutItem *>( item );
QgsLayoutItemPage *paperItem = dynamic_cast<QgsLayoutItemPage *>( item );
if ( paperItem )
focusedPaperItem = paperItem;
if ( layoutItem && !paperItem )
{
if ( !layoutItem->isLocked() )
{
if ( subtractingSelection )
{
layoutItem->setSelected( false );
}
else
{
layoutItem->setSelected( true );
}
if ( wasClick )
{
// found an item, and only a click - nothing more to do
break;
}
}
}
}
//update item panel
const QList<QgsLayoutItem *> selectedItemList = layout()->selectedLayoutItems();
if ( !selectedItemList.isEmpty() )
{
emit itemFocused( selectedItemList.at( 0 ) );
}
else if ( focusedPaperItem )
{
emit itemFocused( focusedPaperItem );
}
else
{
emit itemFocused( nullptr );
}
mMouseHandles->selectionChanged();
}
void QgsLayoutViewToolSelect::wheelEvent( QWheelEvent *event )
{
if ( mMouseHandles->shouldBlockEvent( event ) )
{
//ignore wheel events while dragging/resizing items
return;
}
else
{
event->ignore();
}
}
void QgsLayoutViewToolSelect::keyPressEvent( QKeyEvent *event )
{
if ( mMouseHandles->isDragging() || mMouseHandles->isResizing() )
{
return;
}
else
{
event->ignore();
}
}
void QgsLayoutViewToolSelect::deactivate()
{
if ( mIsSelecting )
{
mRubberBand->finish();
mIsSelecting = false;
}
QgsLayoutViewTool::deactivate();
}
///@cond PRIVATE
QgsLayoutMouseHandles *QgsLayoutViewToolSelect::mouseHandles()
{
return mMouseHandles;
}
void QgsLayoutViewToolSelect::setLayout( QgsLayout *layout )
{
// existing handles are owned by previous layout
if ( mMouseHandles )
mMouseHandles->deleteLater();
//add mouse selection handles to layout, and initially hide
mMouseHandles = new QgsLayoutMouseHandles( layout, view() );
mMouseHandles->hide();
mMouseHandles->setZValue( QgsLayout::ZMouseHandles );
layout->addItem( mMouseHandles );
}
///@endcond