Laurent Rineau
b731d74096
QGraphicsView*. It is now able to handle several graphics view at the same
time (just install several event filters).
New class CGAL::Qt::DemosMainWindow. That class has several protected
methods:
void setupStatusBar();
void addNavigation(QGraphicsView*);
void setupOptionsMenu(QMenu* menu = NULL);
void addAboutCGAL(QMenu* menu = NULL);
void addAboutDemo(QString htmlResourceName, QMenu* menu = NULL);
setupStatusBar() adds a label in the statusBar(), that is connected to the
navigation class, and shows the position of the mouse.
addNavigation(QGraphicsView* v) adds a navigation class to the view v.
setupOptionsMenu(QMenu* m = NULL) adds two options "Use OpenGL" and
"Use antialiasing" to the menu m. If m==0, a menu named "Options" is searched
for, or created if it does not exists.
addAboutCGAL(QMenu* m = NULL) adds an entry "About CGAL..." to the menu
m. If m==0, a "Help" menu is searched for or created.
addAboutDemo(QString htmlResourceName, QMenu* m = NULL) adds an entre
"About the demo...", to the menu m. If m==0, a "Help" menu is searched for
or created. If the entry is clicked, a popup dialog shows the content of
the resource/file whose name is in htmlResourceName.
Example:
addAboutDemo(":/cgal/help/about_triangulation.html")
51 lines
1019 B
C++
51 lines
1019 B
C++
#ifndef CGAL_QT_GRAPHICS_VIEW_NAVIGATION_H
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#define CGAL_QT_GRAPHICS_VIEW_NAVIGATION_H
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#include <QObject>
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#include <QPointF>
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#include <QString>
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#include <QCursor>
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#include <QRect>
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#include <QRectF>
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class QGraphicsView;
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class QGraphicsScene;
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class QEvent;
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class QGraphicsRectItem;
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namespace CGAL {
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namespace Qt {
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class GraphicsViewNavigation: public QObject {
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Q_OBJECT
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signals:
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void mouseCoordinates(QString);
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public:
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GraphicsViewNavigation();
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~GraphicsViewNavigation();
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bool eventFilter(QObject *obj, QEvent *event);
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private:
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void scaleView(QGraphicsView*, qreal scaleFactor);
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void translateView(QGraphicsView*, int dx, int dy);
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void drag_to(QGraphicsView*, QPoint new_pos);
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QRectF mapToScene(QGraphicsView*, QRect rect) const;
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void display_parameters(QGraphicsView*);
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QGraphicsRectItem* rectItem;
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QPointF rect_first_point;
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bool dragging;
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QPointF dragging_start;
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QCursor cursor_backup;
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};
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} // namespace Qt
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} // namespace CGAL
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#endif // CGAL_QT_GRAPHICS_VIEW_NAVIGATION_H
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