Differential D21283 Diff 58337 src/filewidgets/kdiroperatoriconview.cpp

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src/filewidgets/kdiroperatoriconview.cpp

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		1		/*****************************************************************************
		2		* Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at> *
		3		* Copyright (C) 2019 by Méven Car <meven.car@kdemail.net> *
		4		* *
		5		* This library is free software; you can redistribute it and/or *
		6		* modify it under the terms of the GNU Library General Public *
		7		* License version 2 as published by the Free Software Foundation. *
		8		* *
		9		* This library is distributed in the hope that it will be useful, *
		10		* but WITHOUT ANY WARRANTY; without even the implied warranty of *
		11		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
		12		* Library General Public License for more details. *
		13		* *
		14		* You should have received a copy of the GNU Library General Public License *
		15		* along with this library; see the file COPYING.LIB. If not, write to *
		16		* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
		17		* Boston, MA 02110-1301, USA. *
		18		*****************************************************************************/
		19
		20		#include "kdiroperatoriconview_p.h"
		21		#include <QWidget>
		22		#include <QListView>
		23		#include <QDragEnterEvent>
		24		#include <QApplication>
		25		#include <QScrollBar>
		26		#include <QMimeData>
		27
		28		#include <KIconLoader>
		29		#include <KFileItemDelegate>
		30
		31		KDirOperatorIconView::KDirOperatorIconView(QWidget *parent, Kind kind) :
		32		QListView(parent)
		33		{
		34		viewKind = kind;
		35
		36		setViewMode(QListView::IconMode);
		37		setResizeMode(QListView::Adjust);
		38		setSpacing(0);
		39		setMovement(QListView::Static);
		40		setDragDropMode(QListView::DragOnly);
		41		setVerticalScrollMode(QListView::ScrollPerPixel);
		42		setHorizontalScrollMode(QListView::ScrollPerPixel);
		43		setEditTriggers(QAbstractItemView::NoEditTriggers);
		44		setWordWrap(true);
		45		if (viewKind == KDirOperatorIconView::Icon) {
		46		// Icons View
		47		setFlow(QListView::LeftToRight);
		48		} else {
		49		// Compact View
		50		setFlow(QListView::TopToBottom);
		51		setIconSize(QSize(KIconLoader::SizeSmall, KIconLoader::SizeSmall));
		52		}
		53		// triggers a layout update when the icon size has changed
		54		connect(this, &QAbstractItemView::iconSizeChanged, this, &KDirOperatorIconView::updateLayout);
		55		}
		56
		57		KDirOperatorIconView::~KDirOperatorIconView()
		58		{
		59		}
		60
		61		QStyleOptionViewItem KDirOperatorIconView::viewOptions() const
		62		{
		63		QStyleOptionViewItem viewOptions = QListView::viewOptions();
		64		viewOptions.showDecorationSelected = true;
		65		if (viewKind == KDirOperatorIconView::Compact) {
		66		viewOptions.decorationPosition = QStyleOptionViewItem::Left;
		67		viewOptions.displayAlignment = Qt::AlignLeft \| Qt::AlignVCenter;
		68		} else {
		69		viewOptions.decorationPosition = QStyleOptionViewItem::Top;
		70		viewOptions.displayAlignment = Qt::AlignCenter;
		71		}
		72
		73		return viewOptions;
		74		}
		75
		76		void KDirOperatorIconView::dragEnterEvent(QDragEnterEvent *event)
		77		{
		78		if (event->mimeData()->hasUrls()) {
		79		event->acceptProposedAction();
		80		}
		81		}
		82
		83		void KDirOperatorIconView::mousePressEvent(QMouseEvent *event)
		84		{
		85		if (!indexAt(event->pos()).isValid()) {
		86		const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
		87		if (!(modifiers & Qt::ShiftModifier) && !(modifiers & Qt::ControlModifier)) {
		88		clearSelection();
		89		}
		90		}
		91
		92		QListView::mousePressEvent(event);
		93		}
		94
		95		void KDirOperatorIconView::wheelEvent(QWheelEvent *event)
		96		{
		97		QListView::wheelEvent(event);
		98
		99		// apply the vertical wheel event to the horizontal scrollbar, as
		100		// the items are aligned from left to right
		101		if (event->orientation() == Qt::Vertical) {
		102		QWheelEvent horizEvent(event->pos(),
		103		event->delta(),
		104		event->buttons(),
		105		event->modifiers(),
		106		Qt::Horizontal);
		107		QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
		108		}
		109		}
		110
		111		void KDirOperatorIconView::resizeEvent(QResizeEvent *event) {
		112		Q_UNUSED(event);
		113		updateLayout();
		114		}
		115
		116		void KDirOperatorIconView::updateLayout() {
		117		if (viewKind == Kind::Compact) {
		118		setGridSize(QSize());
		119		KFileItemDelegate delegate = qobject_cast<KFileItemDelegate >(itemDelegate());
		120		if (delegate) {
		121		delegate->setMaximumSize(QSize());
		122		}
		123		} else {
		124		const QFontMetrics metrics(viewport()->font());
		125
		126		const int height = iconSize().height() + metrics.height() * 2.5;
		127		const int minWidth = qMax(height, metrics.height() * 5);
		128
		129		const int scrollBarWidth = verticalScrollBar()->sizeHint().width();
		130
		131		// Subtract 1 px to prevent flickering when resizing the window
		132		// For Oxygen a column is missing after showing the dialog without resizing it,
		133		// therefore subtract 4 more (scaled) pixels
		134		const int viewPortWidth = contentsRect().width() - scrollBarWidth - 1 - 4 * devicePixelRatioF();
		135		const int itemsInRow = qMax(1, viewPortWidth / minWidth);
		136		const int remainingWidth = viewPortWidth - (minWidth * itemsInRow);
		137		const int width = minWidth + (remainingWidth / itemsInRow);
		138
		139		const QSize itemSize(width, height);
		140
		141		setGridSize(itemSize);
		142		KFileItemDelegate delegate = qobject_cast<KFileItemDelegate >(itemDelegate());
		143		if (delegate) {
		144		delegate->setMaximumSize(itemSize);
		145		}
		146		}
		147		}