1// Copyright (C) 2017 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qquickiconimage_p.h"
5#include "qquickiconimage_p_p.h"
6
7#include <QtCore/qmath.h>
8#include <QtQuick/private/qquickimagebase_p_p.h>
9
10QT_BEGIN_NAMESPACE
11
12QQuickIconImagePrivate::~QQuickIconImagePrivate()
13{
14 icon.entries.clear();
15}
16
17bool QQuickIconImagePrivate::updateDevicePixelRatio(qreal targetDevicePixelRatio)
18{
19 if (isThemeIcon) {
20 devicePixelRatio = calculateDevicePixelRatio();
21 return true;
22 }
23
24 return QQuickImagePrivate::updateDevicePixelRatio(targetDevicePixelRatio);
25}
26
27void QQuickIconImagePrivate::updateIcon()
28{
29 Q_Q(QQuickIconImage);
30 // Both geometryChange() and QQuickImageBase::sourceSizeChanged()
31 // (which we connect to updateIcon() in the constructor) can be called as a result
32 // of updateIcon() changing the various sizes, so we must check that we're not recursing.
33 if (updatingIcon)
34 return;
35
36 updatingIcon = true;
37
38 QSize size = sourcesize;
39 // If no size is specified for theme icons, it will use the smallest available size.
40 if (size.width() <= 0)
41 size.setWidth(q->width());
42 if (size.height() <= 0)
43 size.setHeight(q->height());
44
45 const qreal dpr = calculateDevicePixelRatio();
46 const QIconLoaderEngineEntry *entry = QIconLoaderEngine::entryForSize(info: icon, size: size * dpr, scale: qCeil(v: dpr));
47
48 if (entry) {
49 QQmlContext *context = qmlContext(q);
50 const QUrl entryUrl = QUrl::fromLocalFile(localfile: entry->filename);
51 url = context ? context->resolvedUrl(entryUrl) : entryUrl;
52 isThemeIcon = true;
53 } else if (source.isEmpty()) {
54 std::unique_ptr<QIconEngine> iconEngine(QIconLoader::instance()->iconEngine(iconName: icon.iconName));
55 if (iconEngine && !iconEngine->isNull()) {
56 // ### TODO that's the best we can do for now to select different pixmaps based on the
57 // QuickItem's state. QQuickIconImage cannot know about the state of the control that
58 // uses it without adding more properties that are then synced up with the control.
59 const QIcon::Mode mode = q->isEnabled() ? QIcon::Normal : QIcon::Disabled;
60 const QImage image = iconEngine->scaledPixmap(size, mode, state: QIcon::Off, scale: dpr).toImage();
61 setImage(image);
62 }
63 } else {
64 url = source;
65 isThemeIcon = false;
66 }
67 if (!url.isEmpty())
68 q->load();
69
70 updatingIcon = false;
71}
72
73void QQuickIconImagePrivate::updateFillMode()
74{
75 Q_Q(QQuickIconImage);
76 // If we start with a sourceSize of 28x28 and then set sourceSize.width to 24, the fillMode
77 // will change to PreserveAspectFit (because pixmapSize.width() > width()), which causes the
78 // pixmap to be reloaded at its original size of 28x28, which causes the fillMode to change
79 // to Pad (because pixmapSize.width() <= width()), and so on.
80 if (updatingFillMode)
81 return;
82
83 updatingFillMode = true;
84
85 const QSize pixmapSize = QSize(currentPix->width(), currentPix->height()) / calculateDevicePixelRatio();
86 if (pixmapSize.width() > q->width() || pixmapSize.height() > q->height())
87 q->setFillMode(QQuickImage::PreserveAspectFit);
88 else
89 q->setFillMode(QQuickImage::Pad);
90
91 updatingFillMode = false;
92}
93
94qreal QQuickIconImagePrivate::calculateDevicePixelRatio() const
95{
96 Q_Q(const QQuickIconImage);
97 return q->window() ? q->window()->effectiveDevicePixelRatio() : qApp->devicePixelRatio();
98}
99
100QQuickIconImage::QQuickIconImage(QQuickItem *parent)
101 : QQuickImage(*(new QQuickIconImagePrivate), parent)
102{
103 setFillMode(Pad);
104}
105
106QString QQuickIconImage::name() const
107{
108 Q_D(const QQuickIconImage);
109 return d->icon.iconName;
110}
111
112void QQuickIconImage::setName(const QString &name)
113{
114 Q_D(QQuickIconImage);
115 if (d->icon.iconName == name)
116 return;
117
118 d->icon.entries.clear();
119 d->icon = QIconLoader::instance()->loadIcon(iconName: name);
120 if (d->icon.iconName.isEmpty())
121 d->icon.iconName = name;
122 if (isComponentComplete())
123 d->updateIcon();
124 emit nameChanged();
125}
126
127QColor QQuickIconImage::color() const
128{
129 Q_D(const QQuickIconImage);
130 return d->color;
131}
132
133void QQuickIconImage::setColor(const QColor &color)
134{
135 Q_D(QQuickIconImage);
136 if (d->color == color)
137 return;
138
139 d->color = color;
140 if (isComponentComplete())
141 d->updateIcon();
142 emit colorChanged();
143}
144
145void QQuickIconImage::setSource(const QUrl &source)
146{
147 Q_D(QQuickIconImage);
148 if (d->source == source)
149 return;
150
151 d->source = source;
152 if (isComponentComplete())
153 d->updateIcon();
154 emit sourceChanged(source);
155}
156
157void QQuickIconImage::snapPositionTo(QPointF pos)
158{
159 // Ensure that we are placed on an integer position relative to the owning control. We assume
160 // that there is exactly one intermediate parent item between us and the control (in practice,
161 // the contentItem). The idea is to enable the app, by placing the controls at integer
162 // positions, to avoid the image being smoothed over pixel boundaries in the basic, DPR=1 case.
163 QPointF offset;
164 if (parentItem())
165 offset = parentItem()->position();
166 QPointF offsetPos(std::round(x: offset.x() + pos.x()), std::round(x: offset.y() + pos.y()));
167 setPosition(offsetPos - offset);
168}
169
170void QQuickIconImage::componentComplete()
171{
172 Q_D(QQuickIconImage);
173 QQuickImage::componentComplete();
174 d->updateIcon();
175 QObjectPrivate::connect(sender: this, signal: &QQuickImageBase::sourceSizeChanged, receiverPrivate: d, slot: &QQuickIconImagePrivate::updateIcon);
176}
177
178void QQuickIconImage::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
179{
180 Q_D(QQuickIconImage);
181 QQuickImage::geometryChange(newGeometry, oldGeometry);
182 if (isComponentComplete() && newGeometry.size() != oldGeometry.size())
183 d->updateIcon();
184}
185
186void QQuickIconImage::itemChange(ItemChange change, const ItemChangeData &value)
187{
188 Q_D(QQuickIconImage);
189 if (change == ItemDevicePixelRatioHasChanged)
190 d->updateIcon();
191 QQuickImage::itemChange(change, value);
192}
193
194void QQuickIconImage::pixmapChange()
195{
196 Q_D(QQuickIconImage);
197 QQuickImage::pixmapChange();
198 d->updateFillMode();
199
200 // Don't apply the color if we're recursing (updateFillMode() can cause us to recurse).
201 if (!d->updatingFillMode && d->color.alpha() > 0) {
202 QImage image = d->currentPix->image();
203 if (!image.isNull()) {
204 QPainter painter(&image);
205 painter.setCompositionMode(QPainter::CompositionMode_SourceIn);
206 painter.fillRect(image.rect(), color: d->color);
207 d->currentPix->setImage(image);
208 }
209 }
210}
211
212QT_END_NAMESPACE
213
214#include "moc_qquickiconimage_p.cpp"
215

source code of qtdeclarative/src/quickcontrolsimpl/qquickiconimage.cpp