Gui: add an image view
This commit is contained in:
wmayer
@@ -1066,6 +1066,7 @@ SET(View_CPP_SRCS
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MDIViewPy.cpp
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MDIViewPyWrap.cpp
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GraphvizView.cpp
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ImageView.cpp
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ActiveObjectList.cpp
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)
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SET(View_HPP_SRCS
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@@ -1073,6 +1074,7 @@ SET(View_HPP_SRCS
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MDIViewPy.h
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MDIViewPyWrap.h
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GraphvizView.h
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ImageView.h
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ActiveObjectList.h
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)
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SET(View_SRCS
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@@ -36,6 +36,7 @@
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# include <QFileInfo>
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# include <QFont>
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# include <QFontMetrics>
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# include <QImageReader>
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# include <QMessageBox>
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# include <QPainter>
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# include <QPointer>
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@@ -62,6 +63,7 @@
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#include "DlgSettingsImageImp.h"
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#include "Document.h"
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#include "FileDialog.h"
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#include "ImageView.h"
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#include "Macro.h"
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#include "MainWindow.h"
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#include "NavigationStyle.h"
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@@ -1807,12 +1809,12 @@ StdViewScreenShot::StdViewScreenShot()
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: Command("Std_ViewScreenShot")
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{
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sGroup = "Standard-View";
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sMenuText = QT_TR_NOOP("Save picture...");
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sMenuText = QT_TR_NOOP("Save image...");
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sToolTipText= QT_TR_NOOP("Creates a screenshot of the active view");
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sWhatsThis = "Std_ViewScreenShot";
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sStatusTip = QT_TR_NOOP("Creates a screenshot of the active view");
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sPixmap = "camera-photo";
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eType = Alter3DView;
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eType = Alter3DView;
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}
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void StdViewScreenShot::activated(int iMsg)
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@@ -1969,6 +1971,51 @@ bool StdViewScreenShot::isActive()
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return isViewOfType(Gui::View3DInventor::getClassTypeId());
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}
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//===========================================================================
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// Std_ViewLoadImage
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//===========================================================================
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DEF_STD_CMD(StdViewLoadImage)
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StdViewLoadImage::StdViewLoadImage()
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: Command("Std_ViewLoadImage")
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{
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sGroup = "Standard-View";
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sMenuText = QT_TR_NOOP("Load image...");
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sToolTipText= QT_TR_NOOP("Loads a image");
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sWhatsThis = "Std_ViewLoadPicture";
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sStatusTip = QT_TR_NOOP("Loads a image");
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//sPixmap = "camera-photo";
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eType = 0;
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}
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void StdViewLoadImage::activated(int iMsg)
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{
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Q_UNUSED(iMsg);
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// add all supported QImage formats
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QStringList mimeTypeFilters;
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QList<QByteArray> supportedMimeTypes = QImageReader::supportedMimeTypes();
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for (const auto& mimeTypeName : supportedMimeTypes) {
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mimeTypeFilters.append(QString::fromLatin1(mimeTypeName));
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}
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// Reading an image
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QFileDialog dialog(Gui::getMainWindow());
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dialog.setWindowTitle(QObject::tr("Choose an image file to open"));
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dialog.setMimeTypeFilters(mimeTypeFilters);
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dialog.selectMimeTypeFilter(QString::fromLatin1("image/png"));
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dialog.setDefaultSuffix(QString::fromLatin1("png"));
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dialog.setAcceptMode(QFileDialog::AcceptOpen);
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dialog.setOption(QFileDialog::DontUseNativeDialog);
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if (dialog.exec()) {
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QString fileName = dialog.selectedFiles().constFirst();
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ImageView* view = new ImageView(Gui::getMainWindow());
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view->loadFile(fileName);
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view->resize(400, 300);
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Gui::getMainWindow()->addWindow(view);
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}
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}
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//===========================================================================
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// Std_ViewCreate
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@@ -3775,6 +3822,7 @@ void CreateViewStdCommands()
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rcCmdMgr.addCommand(new StdCmdViewCreate());
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rcCmdMgr.addCommand(new StdViewScreenShot());
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rcCmdMgr.addCommand(new StdViewLoadImage());
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rcCmdMgr.addCommand(new StdMainFullscreen());
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rcCmdMgr.addCommand(new StdViewDockUndockFullscreen());
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rcCmdMgr.addCommand(new StdCmdSetAppearance());
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363
src/Gui/ImageView.cpp
Normal file
363
src/Gui/ImageView.cpp
Normal file
@@ -0,0 +1,363 @@
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// SPDX-License-Identifier: LGPL-2.1-or-later
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/***************************************************************************
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* Copyright (c) 2023 Werner Mayer <wmayer[at]users.sourceforge.net> *
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* *
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* This file is part of FreeCAD. *
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* *
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* FreeCAD is free software: you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 2.1 of the *
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* License, or (at your option) any later version. *
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* *
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* FreeCAD is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with FreeCAD. If not, see *
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* <https://www.gnu.org/licenses/>. *
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* *
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**************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <QAction>
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# include <QApplication>
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# include <QContextMenuEvent>
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# include <QClipboard>
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# include <QCursor>
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# include <QFileInfo>
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# include <QImageReader>
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# include <QLabel>
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# include <QMenu>
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# include <QMessageBox>
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# include <QMimeData>
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# include <QPainter>
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# include <QPixmap>
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# include <QPrintDialog>
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# include <QPrinter>
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# include <QScrollArea>
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# include <QScrollBar>
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#endif
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#include "ImageView.h"
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using namespace Gui;
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ImageView::ImageView(QWidget* parent)
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: MDIView(nullptr, parent)
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, imageLabel(new QLabel)
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, scrollArea(new QScrollArea)
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, scaleFactor{1.0}
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, dragging{false}
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{
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imageLabel->setBackgroundRole(QPalette::Base);
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imageLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
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imageLabel->setScaledContents(true);
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scrollArea->setBackgroundRole(QPalette::Dark);
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scrollArea->setWidget(imageLabel);
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scrollArea->setVisible(false);
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setCentralWidget(scrollArea);
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setAcceptDrops(true);
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}
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bool ImageView::loadFile(const QString& fileName)
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{
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QImageReader reader(fileName);
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reader.setAutoTransform(true);
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QImage image = reader.read();
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if (image.isNull()) {
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QMessageBox::information(this, tr("Failed to load image file"),
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tr("Cannot load file %1: %2")
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.arg(fileName, reader.errorString()));
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return false;
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}
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setImage(image);
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setWindowFilePath(fileName);
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return true;
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}
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void ImageView::setImage(const QImage& image)
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{
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rawImage = image;
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imageLabel->setPixmap(QPixmap::fromImage(image));
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imageLabel->adjustSize();
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scrollArea->setVisible(true);
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scaleFactor = 1.0;
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}
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void ImageView::scaleImage(double factor)
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{
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scaleFactor *= factor;
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#if QT_VERSION >= QT_VERSION_CHECK(5,15,0)
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imageLabel->resize(scaleFactor * imageLabel->pixmap(Qt::ReturnByValue).size());
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#else
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imageLabel->resize(scaleFactor * imageLabel->pixmap()->size());
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#endif
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adjustScrollBar(scrollArea->horizontalScrollBar(), factor);
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adjustScrollBar(scrollArea->verticalScrollBar(), factor);
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}
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void ImageView::adjustScrollBar(QScrollBar *scrollBar, double factor)
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{
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scrollBar->setValue(int(factor * scrollBar->value()
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+ ((factor - 1) * scrollBar->pageStep()/2)));
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}
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bool ImageView::canZoomIn() const
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{
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int maxWidth{10000};
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return !isFitToWindow() && imageLabel->width() < maxWidth;
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}
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bool ImageView::canZoomOut() const
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{
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int minWidth{200};
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return !isFitToWindow() && imageLabel->width() > minWidth;
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}
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void ImageView::zoomIn()
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{
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double scale{1.25};
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scaleImage(scale);
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}
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void ImageView::zoomOut()
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{
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double scale{0.8};
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scaleImage(scale);
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}
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void ImageView::normalSize()
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{
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imageLabel->adjustSize();
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scaleFactor = 1.0;
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}
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void ImageView::fitToWindow(bool fitView)
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{
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scrollArea->setWidgetResizable(fitView);
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if (!fitView) {
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normalSize();
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}
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}
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bool ImageView::isFitToWindow() const
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{
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return scrollArea->widgetResizable();
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}
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bool ImageView::canDrag() const
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{
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return scrollArea->verticalScrollBar()->isVisible() ||
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scrollArea->horizontalScrollBar()->isVisible();
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}
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void ImageView::startDrag()
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{
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dragging = true;
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}
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void ImageView::stopDrag()
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{
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dragging = false;
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}
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bool ImageView::isDragging() const
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{
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return dragging;
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}
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void ImageView::contextMenuEvent(QContextMenuEvent* event)
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{
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QMenu menu;
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QAction* fitToWindowAct = menu.addAction(tr("Fit to window"));
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fitToWindowAct->setCheckable(true);
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fitToWindowAct->setChecked(isFitToWindow());
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connect(fitToWindowAct, &QAction::toggled, this, &ImageView::fitToWindow);
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QAction* zoomInAct = menu.addAction(tr("Zoom in"), this, &ImageView::zoomIn);
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zoomInAct->setEnabled(canZoomIn());
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QAction* zoomOutAct = menu.addAction(tr("Zoom out"), this, &ImageView::zoomOut);
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zoomOutAct->setEnabled(canZoomOut());
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menu.exec(event->globalPos());
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}
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void ImageView::mousePressEvent(QMouseEvent* event)
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{
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if (event->buttons().testFlag(Qt::MiddleButton)) {
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if (canDrag()) {
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setCursor(QCursor(Qt::ClosedHandCursor));
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startDrag();
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dragPos = event->pos();
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}
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}
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}
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void ImageView::mouseReleaseEvent(QMouseEvent* event)
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{
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if (!event->buttons().testFlag(Qt::MiddleButton)) {
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if (isDragging()) {
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stopDrag();
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unsetCursor();
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}
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}
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}
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void ImageView::mouseMoveEvent(QMouseEvent* event)
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{
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if (isDragging()) {
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QScrollBar* hBar = scrollArea->horizontalScrollBar();
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QScrollBar* vBar = scrollArea->verticalScrollBar();
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QPoint delta = event->pos() - dragPos;
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hBar->setValue(hBar->value() + (isRightToLeft() ? delta.x() : -delta.x()));
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vBar->setValue(vBar->value() - delta.y());
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dragPos = event->pos();
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}
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}
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void ImageView::dropEvent(QDropEvent* event)
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{
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const QMimeData* data = event->mimeData();
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if (data->hasUrls()) {
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loadImageFromUrl(data->urls());
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}
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else {
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MDIView::dropEvent(event);
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}
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}
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void ImageView::dragEnterEvent(QDragEnterEvent* event)
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{
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const QMimeData* data = event->mimeData();
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if (data->hasUrls()) {
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event->accept();
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}
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else {
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event->ignore();
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}
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}
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void ImageView::loadImageFromUrl(const QList<QUrl>& urls)
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{
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if (urls.isEmpty()) {
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return;
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}
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const QUrl& url = urls.first();
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const QFileInfo info(url.toLocalFile());
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if (info.exists() && info.isFile()) {
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loadFile(info.absoluteFilePath());
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}
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}
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void ImageView::pasteImage()
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{
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QImage image = imageFromClipboard();
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if (!image.isNull()) {
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setImage(image);
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}
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}
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bool ImageView::canPasteImage() const
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{
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return !imageFromClipboard().isNull();
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}
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QImage ImageView::imageFromClipboard()
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{
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QImage image;
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if (const QMimeData *mimeData = QApplication::clipboard()->mimeData()) {
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if (mimeData->hasImage()) {
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image = qvariant_cast<QImage>(mimeData->imageData());
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}
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}
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return image;
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}
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void ImageView::print(QPrinter* printer)
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{
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QPrintDialog dialog(printer, this);
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if (dialog.exec()) {
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QPainter painter(printer);
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QPixmap pixmap = QPixmap::fromImage(rawImage);
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QRect rect = painter.viewport();
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QSize size = pixmap.size();
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size.scale(rect.size(), Qt::KeepAspectRatio);
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painter.setViewport(rect.x(), rect.y(), size.width(), size.height());
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painter.setWindow(pixmap.rect());
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painter.drawPixmap(0, 0, pixmap);
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}
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}
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bool ImageView::onMsg(const char* pMsg,const char**)
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{
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if (strcmp("ViewFit", pMsg) == 0) {
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fitToWindow(true);
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return true;
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}
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if (strcmp("ZoomIn", pMsg) == 0) {
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zoomIn();
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return true;
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}
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if (strcmp("ZoomOut", pMsg) == 0) {
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zoomOut();
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return true;
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}
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if (strcmp("Paste", pMsg) == 0) {
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pasteImage();
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return true;
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}
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if (strcmp("Print", pMsg) == 0) {
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print();
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return true;
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}
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if (strcmp("PrintPreview", pMsg) == 0) {
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printPreview();
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return true;
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}
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if (strcmp("PrintPdf", pMsg) == 0) {
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printPdf();
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return true;
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}
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return false;
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}
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bool ImageView::onHasMsg(const char* pMsg) const
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{
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if (strcmp("ViewFit", pMsg) == 0) {
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return true;
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}
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if (strcmp("ZoomIn", pMsg) == 0) {
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return canZoomIn();
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}
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if (strcmp("ZoomOut", pMsg) == 0) {
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return canZoomOut();
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}
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if (strcmp("Paste", pMsg) == 0) {
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return canPasteImage();
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}
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if (strcmp("Print", pMsg) == 0) {
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return true;
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}
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if (strcmp("PrintPreview", pMsg) == 0) {
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return true;
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}
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if (strcmp("PrintPdf", pMsg) == 0) {
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return true;
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}
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return false;
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}
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#include "moc_ImageView.cpp"
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98
src/Gui/ImageView.h
Normal file
98
src/Gui/ImageView.h
Normal file
@@ -0,0 +1,98 @@
|
||||
// SPDX-License-Identifier: LGPL-2.1-or-later
|
||||
|
||||
/***************************************************************************
|
||||
* Copyright (c) 2023 Werner Mayer <wmayer[at]users.sourceforge.net> *
|
||||
* *
|
||||
* This file is part of FreeCAD. *
|
||||
* *
|
||||
* FreeCAD is free software: you can redistribute it and/or modify it *
|
||||
* under the terms of the GNU Lesser General Public License as *
|
||||
* published by the Free Software Foundation, either version 2.1 of the *
|
||||
* License, or (at your option) any later version. *
|
||||
* *
|
||||
* FreeCAD is distributed in the hope that it will be useful, but *
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of *
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
|
||||
* Lesser General Public License for more details. *
|
||||
* *
|
||||
* You should have received a copy of the GNU Lesser General Public *
|
||||
* License along with FreeCAD. If not, see *
|
||||
* <https://www.gnu.org/licenses/>. *
|
||||
* *
|
||||
**************************************************************************/
|
||||
|
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#ifndef GUI_IMAGE_VIEW_H
|
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#define GUI_IMAGE_VIEW_H
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||||
|
||||
#include <Gui/MDIView.h>
|
||||
|
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class QLabel;
|
||||
class QScrollArea;
|
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class QScrollBar;
|
||||
class QUrl;
|
||||
|
||||
namespace Gui {
|
||||
|
||||
class GuiExport ImageView : public MDIView
|
||||
{
|
||||
Q_OBJECT
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||||
|
||||
public:
|
||||
explicit ImageView(QWidget* parent);
|
||||
bool loadFile(const QString &);
|
||||
|
||||
const char *getName() const override {
|
||||
return "ImageView";
|
||||
}
|
||||
|
||||
/// Message handler
|
||||
bool onMsg(const char* pMsg, const char** ppReturn) override;
|
||||
/// Message handler test
|
||||
bool onHasMsg(const char* pMsg) const override;
|
||||
|
||||
/** @name Printing */
|
||||
//@{
|
||||
using MDIView::print;
|
||||
void print(QPrinter* printer) override;
|
||||
//@}
|
||||
|
||||
protected:
|
||||
void contextMenuEvent(QContextMenuEvent* event) override;
|
||||
void mousePressEvent(QMouseEvent* event) override;
|
||||
void mouseReleaseEvent(QMouseEvent* event) override;
|
||||
void mouseMoveEvent(QMouseEvent* event) override;
|
||||
void dropEvent(QDropEvent* event) override;
|
||||
void dragEnterEvent(QDragEnterEvent* event) override;
|
||||
|
||||
private:
|
||||
void setImage(const QImage& image);
|
||||
void scaleImage(double factor);
|
||||
static void adjustScrollBar(QScrollBar *scrollBar, double factor);
|
||||
bool canZoomIn() const;
|
||||
bool canZoomOut() const;
|
||||
void zoomIn();
|
||||
void zoomOut();
|
||||
void normalSize();
|
||||
void fitToWindow(bool fitView);
|
||||
bool isFitToWindow() const;
|
||||
bool canDrag() const;
|
||||
void startDrag();
|
||||
void stopDrag();
|
||||
bool isDragging() const;
|
||||
void pasteImage();
|
||||
bool canPasteImage() const;
|
||||
static QImage imageFromClipboard();
|
||||
void loadImageFromUrl(const QList<QUrl>&);
|
||||
|
||||
private:
|
||||
QImage rawImage;
|
||||
QLabel *imageLabel;
|
||||
QScrollArea *scrollArea;
|
||||
double scaleFactor;
|
||||
bool dragging;
|
||||
QPoint dragPos;
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif //GUI_IMAGE_VIEW_H
|
||||
@@ -697,6 +697,7 @@ MenuItem* StdWorkbench::setupMenuBar() const
|
||||
*tool << "Std_DlgParameter"
|
||||
<< "Separator"
|
||||
<< "Std_ViewScreenShot"
|
||||
<< "Std_ViewLoadImage"
|
||||
<< "Std_SceneInspector"
|
||||
<< "Std_DependencyGraph"
|
||||
<< "Std_ProjectUtil"
|
||||
|
||||
Reference in New Issue
Block a user