Differential D21459 Diff 58779 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​ * This library is free software; you can redistribute it and/or *
5​ * modify it under the terms of the GNU Library General Public *
6​ * License version 2 as published by the Free Software Foundation. *
7​ * *
8​ * This library is distributed in the hope that it will be useful, *
9​ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
10​ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
11​ * Library General Public License for more details. *
12​ * *
13​ * You should have received a copy of the GNU Library General Public License *
14​ * along with this library; see the file COPYING.LIB. If not, write to *
15​ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
16​ * Boston, MA 02110-1301, USA. *
17​ *****************************************************************************/
18​
19​#include "kdiroperatoriconview_p.h"
20​
21​#include <QDragEnterEvent>
22​#include <QMimeData>
23​#include <QScrollBar>
24​#include <QApplication>
25​
26​#include <KIconLoader>
27​#include <KFileItemDelegate>
28​
29​KDirOperatorIconView::KDirOperatorIconView(QWidget *parent, QStyleOptionViewItem::Position aDecorationPosition) :
30​ QListView(parent)
31​{
32​ setViewMode(QListView::IconMode);
33​ setResizeMode(QListView::Adjust);
34​ setSpacing(0);
35​ setMovement(QListView::Static);
36​ setDragDropMode(QListView::DragOnly);
37​ setVerticalScrollMode(QListView::ScrollPerPixel);
38​ setHorizontalScrollMode(QListView::ScrollPerPixel);
39​ setEditTriggers(QAbstractItemView::NoEditTriggers);
40​ setWordWrap(true);
41​ setIconSize(QSize(KIconLoader::SizeSmall, KIconLoader::SizeSmall));
42​
43​ decorationPosition = aDecorationPosition;
44​
45​ updateLayout();
46​ connect(this, &QListView::iconSizeChanged, this, &KDirOperatorIconView::updateLayout);
47​}
48​
49​KDirOperatorIconView::~KDirOperatorIconView()
50​{
51​}
52​
53​void KDirOperatorIconView::resizeEvent(QResizeEvent *event)
54​{
55​ Q_UNUSED(event);
56​
57​ updateLayout();
58​}
59​
60​QStyleOptionViewItem KDirOperatorIconView::viewOptions() const
61​{
62​ QStyleOptionViewItem viewOptions = QListView::viewOptions();
63​ viewOptions.showDecorationSelected = true;
64​ viewOptions.decorationPosition = decorationPosition;
65​ if (viewOptions.decorationPosition == QStyleOptionViewItem::Left) {
66​ viewOptions.displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
67​ } else {
68​ viewOptions.displayAlignment = Qt::AlignCenter;
69​ }
70​
71​ return viewOptions;
72​}
73​
74​void KDirOperatorIconView::dragEnterEvent(QDragEnterEvent *event)
75​{
76​ if (event->mimeData()->hasUrls()) {
77​ event->acceptProposedAction();
78​ }
79​}
80​
81​void KDirOperatorIconView::mousePressEvent(QMouseEvent *event)
82​{
83​ if (!indexAt(event->pos()).isValid()) {
84​ const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
85​ if (!(modifiers & Qt::ShiftModifier) && !(modifiers & Qt::ControlModifier)) {
86​ clearSelection();
87​ }
88​ }
89​
90​ QListView::mousePressEvent(event);
91​}
92​
93​void KDirOperatorIconView::wheelEvent(QWheelEvent *event)
94​{
95​ QListView::wheelEvent(event);
96​
97​ // apply the vertical wheel event to the horizontal scrollbar, as
98​ // the items are aligned from left to right
99​ if (event->orientation() == Qt::Vertical) {
100​ QWheelEvent horizEvent(event->pos(),
101​ event->delta(),
102​ event->buttons(),
103​ event->modifiers(),
104​ Qt::Horizontal);
105​ QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
106​ }
107​}
108​
109​void KDirOperatorIconView::updateLayout() {
110​ if (decorationPosition == QStyleOptionViewItem::Position::Top) {
111​ // Icons view
112​ setFlow(QListView::LeftToRight);
113​ const QFontMetrics metrics(viewport()->font());
114​
115​ const int height = iconSize().height() + metrics.height() * 2.5;
116​ const int minWidth = qMax(height, metrics.height() * 5);
117​
118​ const int scrollBarWidth = verticalScrollBar()->sizeHint().width();
119​
120​ // Subtract 1 px to prevent flickering when resizing the window
121​ // For Oxygen a column is missing after showing the dialog without resizing it,
122​ // therefore subtract 4 more (scaled) pixels
123​ const int viewPortWidth = contentsRect().width() - scrollBarWidth - 1 - 4 * devicePixelRatioF();
124​ const int itemsInRow = qMax(1, viewPortWidth / minWidth);
125​ const int remainingWidth = viewPortWidth - (minWidth * itemsInRow);
126​ const int width = minWidth + (remainingWidth / itemsInRow);
127​
128​ const QSize itemSize(width, height);
129​
130​ setGridSize(itemSize);
131​ KFileItemDelegate *delegate = qobject_cast<KFileItemDelegate *>(itemDelegate());
132​ if (delegate) {
133​ delegate->setMaximumSize(itemSize);
134​ }
135​ } else {
136​ // compact view
137​ setFlow(QListView::TopToBottom);
138​ setGridSize(QSize());
139​ KFileItemDelegate *delegate = qobject_cast<KFileItemDelegate *>(itemDelegate());
140​ if (delegate) {
141​ delegate->setMaximumSize(QSize());
142​ }
143​ }
144​}
145​void KDirOperatorIconView::setDecorationPosition(QStyleOptionViewItem::Position newDecorationPosition)
146​{
147​ decorationPosition = newDecorationPosition;
148​ updateLayout();
149​}