git-svn-id: svn://db.shs.com.ru/libs@452 a8b55f48-bf90-11e4-a774-851b48703e85

qad/widgets/image_view.cpp

@@ -0,0 +1,133 @@
+#include "image_view.h"
+#include <QGraphicsScene>
+#include <QBuffer>
+#include <QEvent>
+#include <QMouseEvent>
+#include <QWheelEvent>
+#include <QDebug>
+#include <qmath.h>
+
+
+ImageView::ImageView(QWidget * parent): QGraphicsView(parent) {
+	setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+	setDragMode(QGraphicsView::NoDrag);
+	setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
+	setScene(new QGraphicsScene());
+	item.setTransformationMode(Qt::SmoothTransformation);
+	item.setFlags(0);
+	scene()->addItem(&item);
+	viewport()->installEventFilter(this);
+	autofit_ = true;
+}
+
+
+ImageView::~ImageView() {
+}
+
+
+QPixmap ImageView::pixmap() const {
+	return item.pixmap();
+}
+
+
+void ImageView::setPixmap(QPixmap pixmap) {
+	item.setPixmap(pixmap);
+	adjustView();
+}
+
+
+void ImageView::setImage(const QImage & i) {
+	im_data.clear();
+	if (i.isNull()) {
+		item.setPixmap(QPixmap());
+		return;
+	}
+	QBuffer b(&im_data); b.open(QIODevice::ReadWrite);
+	i.save(&b, "png");
+	b.close();
+	item.setPixmap(QPixmap::fromImage(i));
+	adjustView();
+}
+
+
+void ImageView::setImage(const QByteArray & i) {
+	im_data = i;
+	if (i.isEmpty()) {
+		item.setPixmap(QPixmap());
+		return;
+	}
+	item.setPixmap(QPixmap::fromImage(QImage::fromData(i)));
+	adjustView();
+
+}
+
+
+void ImageView::clear() {
+	im_data.clear();
+	item.setPixmap(QPixmap());
+}
+
+
+void ImageView::mouseDoubleClickEvent(QMouseEvent * e) {
+	autofit();
+}
+
+
+void ImageView::mousePressEvent(QMouseEvent * e) {
+	QGraphicsView::mousePressEvent(e);
+	emit clicked(mapToScene(e->pos()), e->buttons());
+}
+
+
+void ImageView::mouseMoveEvent(QMouseEvent * e) {
+	//if (e->buttons().testFlag(Qt::RightButton) && !autofit_ && isInteractive()) return;;
+	QGraphicsView::mouseMoveEvent(e);
+}
+
+
+void ImageView::wheelEvent(QWheelEvent * e) {
+	if (!e->modifiers().testFlag(Qt::ControlModifier) || !isInteractive()) return;
+	double scl = 1. + e->delta() / 500.;
+	//autofit_ = false;
+	//scale(scl, scl);
+}
+
+
+bool ImageView::eventFilter(QObject * o, QEvent * e) {
+	QMouseEvent * me = (QMouseEvent *)e;
+	switch (e->type()) {
+	case QEvent::Resize:
+		adjustView();
+		break;
+	case QEvent::MouseButtonPress:
+		prev_pos = me->pos();
+		break;
+	case QEvent::MouseMove:
+		if (!me->buttons().testFlag(Qt::RightButton) || autofit_ || !isInteractive()) break;
+		{
+		double scl = 1. / qSqrt(transform().determinant());
+		QPointF dp = QPointF(me->pos() - prev_pos) * scl;
+		//qDebug() << dp;
+		//translate(0.00001, 0);
+		prev_pos = me->pos();
+		}
+		break;
+	default: break;
+	}
+	return QGraphicsView::eventFilter(o, e);
+}
+
+
+void ImageView::adjustView() {
+	if (!autofit_) return;
+	setSceneRect(item.boundingRect());
+	fitInView(&item, Qt::KeepAspectRatio);
+	centerOn(&item);
+}
+
+
+void ImageView::autofit() {
+	autofit_ = true;
+	adjustView();
+}

qad/widgets/image_view.h

@@ -0,0 +1,46 @@
+#ifndef IMAGE_VIEW_H
+#define IMAGE_VIEW_H
+
+#include <QGraphicsView>
+#include <QGraphicsPixmapItem>
+
+
+class ImageView: public QGraphicsView
+{
+	Q_OBJECT
+	Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
+public:
+	ImageView(QWidget * parent = 0);
+	~ImageView();
+
+	void setImage(const QImage & i);
+	void setImage(const QByteArray & i);
+	QByteArray image() const {return im_data;}
+	QPixmap pixmap() const;
+
+	void clear();
+
+private:
+	void mouseDoubleClickEvent(QMouseEvent * e);
+	void mousePressEvent(QMouseEvent * e);
+	void mouseMoveEvent(QMouseEvent * e);
+	void wheelEvent(QWheelEvent * e);
+	bool eventFilter(QObject * o, QEvent * e);
+	void adjustView();
+
+	QGraphicsPixmapItem item;
+	QByteArray im_data;
+	QPoint prev_pos;
+	bool autofit_;
+
+
+public slots:
+	void autofit();
+	void setPixmap(QPixmap pixmap);
+
+signals:
+	void clicked(QPointF, Qt::MouseButtons);
+
+};
+
+#endif // IMAGE_VIEW_H

qad/widgets/plugin/imageviewplugin.cpp

@@ -0,0 +1,69 @@
+#include "image_view.h"
+#include "imageviewplugin.h"
+#include <QtCore/QtPlugin>
+
+
+ImageViewPlugin::ImageViewPlugin(QObject * parent): QObject(parent) {
+	m_initialized = false;
+}
+
+
+void ImageViewPlugin::initialize(QDesignerFormEditorInterface * /* core */) {
+	if (m_initialized)
+		return;
+
+	// Add extension registrations, etc. here
+
+	m_initialized = true;
+}
+
+
+bool ImageViewPlugin::isInitialized() const {
+	return m_initialized;
+}
+
+
+QWidget * ImageViewPlugin::createWidget(QWidget * parent) {
+	return new ImageView(parent);
+}
+
+
+QString ImageViewPlugin::name() const {
+	return QLatin1String("ImageView");
+}
+
+
+QString ImageViewPlugin::group() const {
+	return QLatin1String("Display Widgets");
+}
+
+
+QIcon ImageViewPlugin::icon() const {
+	return QIcon(/*":/icons/spinslider.png"*/);
+}
+
+
+QString ImageViewPlugin::toolTip() const {
+	return QLatin1String("Image viewer");
+}
+
+
+QString ImageViewPlugin::whatsThis() const {
+	return QLatin1String("Image viewer");
+}
+
+
+bool ImageViewPlugin::isContainer() const {
+	return false;
+}
+
+
+QString ImageViewPlugin::domXml() const {
+	return QLatin1String("<widget class=\"ImageView\" name=\"imageView\">\n</widget>\n");
+}
+
+
+QString ImageViewPlugin::includeFile() const {
+	return QLatin1String("image_view.h");
+}
+

qad/widgets/plugin/imageviewplugin.h

@@ -0,0 +1,36 @@
+#ifndef IMAGEVIEWPLUGIN_H
+#define IMAGEVIEWPLUGIN_H
+
+#include <QObject>
+#if QT_VERSION >= 0x050000
+#  include <QtUiPlugin/QDesignerCustomWidgetInterface>
+#else
+#  include <QDesignerCustomWidgetInterface>
+#endif
+
+class ImageViewPlugin: public QObject, public QDesignerCustomWidgetInterface
+{
+	Q_OBJECT
+	Q_INTERFACES(QDesignerCustomWidgetInterface)
+
+public:
+	ImageViewPlugin(QObject * parent = 0);
+
+	bool isContainer() const;
+	bool isInitialized() const;
+	QIcon icon() const;
+	QString domXml() const;
+	QString group() const;
+	QString includeFile() const;
+	QString name() const;
+	QString toolTip() const;
+	QString whatsThis() const;
+	QWidget * createWidget(QWidget * parent);
+	void initialize(QDesignerFormEditorInterface * core);
+
+private:
+	bool m_initialized;
+
+};
+
+#endif

qad/widgets/plugin/qad_widgets.cpp

@@ -14,6 +14,7 @@
 #include "qvarianteditplugin.h"
 #include "qpiconfigplugin.h"
 #include "evalspinboxplugin.h"
+#include "imageviewplugin.h"
 
 
 QADWidgets::QADWidgets(QObject * parent): QObject(parent) {
@@ -32,6 +33,7 @@ QADWidgets::QADWidgets(QObject * parent): QObject(parent) {
 	m_widgets.append(new QVariantEditPlugin(this));
 	m_widgets.append(new QPIConfigPlugin(this));
 	m_widgets.append(new EvalSpinBoxPlugin(this));
+	m_widgets.append(new ImageViewPlugin(this));
 }