opencv/modules/highgui/src/window_QT.h

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//--------------------Google Code 2010 -- Yannick Verdie--------------------//
#ifndef __OPENCV_HIGHGUI_QT_H__
#define __OPENCV_HIGHGUI_QT_H__


#include "precomp.hpp"

#if defined(OPENCV_GL)
#include <QGLWidget>
#endif

#include <QAbstractEventDispatcher>
#include <QtGui/QApplication>
#include <QFile>
#include <QPushButton>
#include <QtGui/QGraphicsView>
#include <QSizePolicy>
#include <QInputDialog>
#include <QtGui/QBoxLayout>
#include <QSettings>
#include <qtimer.h>
#include <QtConcurrentRun>
#include <QWaitCondition>
#include <QKeyEvent>
#include <QMetaObject>
#include <QPointer>
#include <QSlider>
#include <QLabel>
#include <QIODevice>

//Macro here
#define CV_MODE_NORMAL   0
#define CV_MODE_OPENGL   1
//end macro

class CvWindow;
class ViewPort;
//class CvTrackbar;


class GuiReceiver : public QObject
{
    Q_OBJECT

public:
    GuiReceiver();
    int start();
    bool _bTimeOut;
private:


public slots:
    void createWindow( QString name, int flags = 0 );
    void destroyWindow(QString name);
    void destroyAllWindow();
    void addSlider(QString trackbar_name, QString window_name, void* value, int count, void* on_change);
    void moveWindow(QString name, int x, int y);
    void resizeWindow(QString name, int width, int height);
    void showImage(QString name, void* arr);
    void displayInfo( QString name, QString text, int delayms );
    void refreshEvents();
    void timeOut();
    void toggleFullScreen(QString name, double flags );
    double isFullScreen(QString name);
};

class CvTrackbar : public QHBoxLayout
{
    Q_OBJECT
public:
    CvTrackbar(CvWindow* parent, QString name, int* value, int count, CvTrackbarCallback on_change = NULL);
    ~CvTrackbar();

    QString trackbar_name;
    QPointer<QSlider> slider;

private slots:
    void createDialog();
    void update(int myvalue);

private:
    void setLabel(int myvalue);

    QString createLabel();
    QPointer<QPushButton > label;
    CvTrackbarCallback callback;
    CvWindow* parent;
    int* dataSlider;
};

class CvWindow : public QWidget
{
    Q_OBJECT
public:
    CvWindow(QString arg2, int flag = CV_WINDOW_NORMAL);
    ~CvWindow();
    void addSlider(QString name, int* value, int count, CvTrackbarCallback on_change = NULL);
    void setMouseCallBack(CvMouseCallback m, void* param);
    void updateImage(void* arr);
    void displayInfo(QString text, int delayms );

    QPointer<QBoxLayout> layout;
    QString name;
    int flags;

protected:
    void readSettings();
    void writeSettings();

    virtual void keyPressEvent(QKeyEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseDoubleClickEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);

private:
    QPointer<ViewPort> myview;
    
    int status;//0 normal, 1 fullscreen (YV)

    CvMouseCallback on_mouse;
    void* on_mouse_param;

};



class ViewPort : public QGraphicsView
{
    Q_OBJECT
public:
    ViewPort(QWidget* centralWidget, int mode = CV_MODE_NORMAL);
    ~ViewPort();
    void updateImage(void* arr);
    void startDisplayInfo(QString text, int delayms);

public slots:
    void zoomIn() { scale(1.2, 1.2); }
    void zoomOut() { scale(1 / 1.2, 1 / 1.2); }
    void rotateLeft() { rotate(-10); }
    void rotateRight() { rotate(10); }

private:
    int mode;
    IplImage* image2Draw;
    bool isSameSize(IplImage* img1,IplImage* img2);
    QSize sizeHint() const;
    QWidget* centralWidget;
    QTimer* timerDisplay;
    bool drawInfo;
    QString infoText;
    //QImage* image;

    void paintEvent(QPaintEvent* paintEventInfo);
    void mouseMoveEvent(QMouseEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void mouseDoubleClickEvent(QMouseEvent *event);
    void drawInstructions(QPainter *painter);
    void draw2D(QPainter *painter);

#if defined(OPENCV_GL)
    void draw3D();
    void unsetGL();
    void initGL();
    void setGL(int width, int height);
#endif

private slots:
    void stopDisplayInfo();
};


//here css for trackbar
/* from http://thesmithfam.org/blog/2010/03/10/fancy-qslider-stylesheet */
static const QString str_Trackbar_css = QString("")
+										"QSlider::groove:horizontal {"
+										"border: 1px solid #bbb;"
+										"background: white;"
+										"height: 10px;"
+										"border-radius: 4px;"
+										"}"

+										"QSlider::sub-page:horizontal {"
+										"background: qlineargradient(x1: 0, y1: 0,    x2: 0, y2: 1,"
+										"stop: 0 #66e, stop: 1 #bbf);"
+										"background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,"
+										"stop: 0 #bbf, stop: 1 #55f);"
+										"border: 1px solid #777;"
+										"height: 10px;"
+										"border-radius: 4px;"
+										"}"

+										"QSlider::add-page:horizontal {"
+										"background: #fff;"
+										"border: 1px solid #777;"
+										"height: 10px;"
+										"border-radius: 4px;"
+										"}"
										
+										"QSlider::handle:horizontal {"
+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
+										"stop:0 #eee, stop:1 #ccc);"
+										"border: 1px solid #777;"
+										"width: 13px;"
+										"margin-top: -2px;"
+										"margin-bottom: -2px;"
+										"border-radius: 4px;"
+										"}"

+										"QSlider::handle:horizontal:hover {"
+										"background: qlineargradient(x1:0, y1:0, x2:1, y2:1,"
+										"stop:0 #fff, stop:1 #ddd);"
+										"border: 1px solid #444;"
+										"border-radius: 4px;"
+										"}"
										
+										"QSlider::sub-page:horizontal:disabled {"
+										"background: #bbb;"
+										"border-color: #999;"
+										"}"
										
+										"QSlider::add-page:horizontal:disabled {"
+										"background: #eee;"
+										"border-color: #999;"
+										"}"
										
+										"QSlider::handle:horizontal:disabled {"
+										"background: #eee;"
+										"border: 1px solid #aaa;"
+										"border-radius: 4px;"
+										"}";

#endif