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135 lines
3.7 KiB
135 lines
3.7 KiB
/*
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* LXImage-Qt - a simple and fast image viewer
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* Copyright (C) 2013 PCMan <pcman.tw@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef LXIMAGE_IMAGEVIEW_H
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#define LXIMAGE_IMAGEVIEW_H
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#include "graphicsscene.h"
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#include <QGraphicsView>
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#include <QGraphicsScene>
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#include <QGraphicsRectItem>
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#include <QImage>
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#include <QPixmap>
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#include <QMovie>
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#include <QRect>
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class QTimer;
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namespace LxImage {
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class ImageView : public QGraphicsView {
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Q_OBJECT
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public:
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ImageView(QWidget* parent = 0);
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virtual ~ImageView();
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void setImage(const QImage& image, bool show = true);
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void setGifAnimation(const QString& fileName);
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void setSVG(const QString& fileName);
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QImage image() {
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return image_;
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}
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void setScaleFactor(double scale);
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double scaleFactor() {
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return scaleFactor_;
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}
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void zoomIn();
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void zoomOut();
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void zoomFit();
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void zoomOriginal();
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bool autoZoomFit() {
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return autoZoomFit_;
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}
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// if set to true, zoomFit() is done automatically when the size of the window is changed.
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void setAutoZoomFit(bool value) {
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autoZoomFit_ = value;
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}
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// if set to true, hides the cursor after 3s of inactivity
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void hideCursor(bool enable);
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// Annotation tools
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enum Tool {
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ToolNone,
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ToolArrow,
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ToolRectangle,
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ToolCircle,
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ToolNumber
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};
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void activateTool(Tool tool);
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Q_SIGNALS:
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void fileDropped(const QString file);
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protected:
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virtual void wheelEvent(QWheelEvent* event);
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virtual void mouseDoubleClickEvent(QMouseEvent* event);
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virtual void mousePressEvent(QMouseEvent* event);
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virtual void mouseReleaseEvent(QMouseEvent* event);
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virtual void mouseMoveEvent(QMouseEvent* event);
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virtual void focusInEvent(QFocusEvent* event);
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virtual void resizeEvent(QResizeEvent* event);
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virtual void paintEvent(QPaintEvent* event);
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private:
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void queueGenerateCache();
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QRect viewportToScene(const QRect& rect);
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QRect sceneToViewport(const QRectF& rect);
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void drawArrow(QPainter &painter,
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const QPoint &start,
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const QPoint &end,
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qreal tipAngle,
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int tipLen) const;
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private Q_SLOTS:
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void onFileDropped(const QString file);
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void generateCache();
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void blankCursor();
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private:
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GraphicsScene* scene_; // the topmost container of all graphic items
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QGraphicsRectItem* imageItem_; // the rect item used to draw the image
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QImage image_; // image to show
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QMovie *gifMovie_; // gif animation to show (should be deleted explicitly)
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QPixmap cachedPixmap_; // caching of current viewport content (high quality scaled image)
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QRect cachedRect_; // rectangle containing the cached region (in viewport coordinate)
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QRect cachedSceneRect_; // rectangle containing the cached region (in scene/original image coordinate)
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QTimer* cacheTimer_;
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QTimer *cursorTimer_; // for hiding cursor in fullscreen mode
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double scaleFactor_;
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bool autoZoomFit_;
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bool isSVG; // is the image an SVG file?
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Tool currentTool; // currently selected tool
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QPoint startPoint; // starting point for the tool
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int nextNumber;
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};
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}
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#endif // LXIMAGE_IMAGEVIEW_H
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