alexpete
122 lines
3.8 KiB
C++
122 lines
3.8 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#include "SvgLabelPage.h"
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#include <AzQtComponents/Gallery/ui_SvgLabelPage.h>
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#include <QDragEnterEvent>
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#include <QMimeData>
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#include <QSvgRenderer>
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SvgLabelPage::SvgLabelPage(QWidget* parent)
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: QWidget(parent)
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, m_ui(new Ui::SvgLabelPage)
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{
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m_ui->setupUi(this);
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QObject::connect(m_ui->widthBox, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &SvgLabelPage::onWidthChanged);
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QObject::connect(m_ui->heightBox, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &SvgLabelPage::onHeightChanged);
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QObject::connect(m_ui->resetSize, &QPushButton::clicked, this, &SvgLabelPage::onResetSize);
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QObject::connect(m_ui->maintainAspectRatio, &QCheckBox::toggled, this, &SvgLabelPage::onMaintainAspectToggled);
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setAcceptDrops(true);
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QString exampleText = R"(
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This is a simple QSvgWidget that demonstrates how Qt renders scalable vector graphics (svg files).<br/><br>
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Drag and drop a .svg file onto this page to load and display the image. You can also manipulate the width and height of the rendered svg using the controls on the right.<br/>
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Qt SVG docs: <a href="https://doc.qt.io/qt-5.10/qtsvg-module.html">https://doc.qt.io/qt-5.10/qtsvg-module.html</a><br/>
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<pre>
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#include <QSvgRenderer>
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#include <QSvgWidget>
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// widget to show an svg image:
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QSvgWidget theImage;
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theImage.load("pathToFile/SvgFile.svg");
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<br>
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// class to render an svg file to an image:
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QSvgRenderer theRenderer;
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theRenderer.load("pathToFile/SvgFile.svg");
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theRenderer.render(theQPainter);
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</pre>
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)";
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m_ui->exampleText->setHtml(exampleText);
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}
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SvgLabelPage::~SvgLabelPage()
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{
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}
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void SvgLabelPage::onWidthChanged(int newWidth)
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{
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m_ui->image->setMinimumWidth(newWidth);
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m_ui->image->setMaximumWidth(newWidth);
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if (m_ui->maintainAspectRatio->isChecked())
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{
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QSignalBlocker blockResize(m_ui->image);
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const int newHeight = qRound(float(newWidth) * (float(m_initialSize.height()) / m_initialSize.width()));
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m_ui->heightBox->setValue(newHeight);
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}
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}
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void SvgLabelPage::onHeightChanged(int newHeight)
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{
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m_ui->image->setMinimumHeight(newHeight);
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m_ui->image->setMaximumHeight(newHeight);
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if (m_ui->maintainAspectRatio->isChecked())
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{
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QSignalBlocker blockResize(m_ui->image);
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const int newWidth = qRound(float(newHeight) * (float(m_initialSize.width()) / m_initialSize.height()));
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m_ui->widthBox->setValue(newWidth);
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}
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}
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void SvgLabelPage::onResetSize()
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{
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m_ui->widthBox->setValue(m_initialSize.width());
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m_ui->heightBox->setValue(m_initialSize.height());
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}
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void SvgLabelPage::onMaintainAspectToggled(bool checked)
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{
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// if they've checked maintain aspect ratio, adjust the height to be proportional to the width
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if (checked)
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{
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onWidthChanged(m_ui->widthBox->value());
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}
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}
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void SvgLabelPage::dragEnterEvent(QDragEnterEvent *event)
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{
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if (event->mimeData()->hasUrls())
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{
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event->acceptProposedAction();
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}
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}
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void SvgLabelPage::dropEvent(QDropEvent *event)
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{
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Q_ASSERT(event->mimeData()->hasUrls());
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QUrl firstUrl = event->mimeData()->urls().first();
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QSvgWidget* theImage = m_ui->image;
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theImage->load(firstUrl.toLocalFile());
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m_initialSize = theImage->renderer()->defaultSize();
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onResetSize();
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}
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