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c943431104
(GraphicsView) Does not use standard QGraphicsView::scale and QGraphicsView::centerOn methods, does not use standard QScrollBar because of it's fast value overflow. Using manual offset for all scene items instead of standard scrolling.
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/************************************************************************
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* file name : graphics_scrollbar.h
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* ----------------- :
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* creation time : 2016/07/04
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* copyright : (c) 2016 Victor Zarubkin
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* author : Victor Zarubkin
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* email : v.s.zarubkin@gmail.com
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* ----------------- :
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* description : .
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* ----------------- :
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* change log : * 2016/07/04 Victor Zarubkin: Initial commit.
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* :
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* : *
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* ----------------- :
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* license : TODO: add license text
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************************************************************************/
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#ifndef EASY_PROFILER__GRAPHICS_SCROLLBAR__H
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#define EASY_PROFILER__GRAPHICS_SCROLLBAR__H
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#include <stdlib.h>
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#include <QGraphicsView>
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#include <QGraphicsScene>
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#include <QGraphicsRectItem>
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//////////////////////////////////////////////////////////////////////////
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class GraphicsHorizontalSlider : public QGraphicsRectItem
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{
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typedef QGraphicsRectItem Parent;
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typedef GraphicsHorizontalSlider This;
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private:
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qreal m_halfwidth;
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public:
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GraphicsHorizontalSlider();
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virtual ~GraphicsHorizontalSlider();
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void paint(QPainter* _painter, const QStyleOptionGraphicsItem* _option, QWidget* _widget = nullptr) override;
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qreal width() const;
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qreal halfwidth() const;
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void setWidth(qreal _width);
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void setHalfwidth(qreal _halfwidth);
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void setColor(QRgb _color);
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}; // END of class GraphicsHorizontalSlider.
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//////////////////////////////////////////////////////////////////////////
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class GraphicsHorizontalScrollbar : public QGraphicsView
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{
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Q_OBJECT
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private:
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typedef QGraphicsView Parent;
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typedef GraphicsHorizontalScrollbar This;
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qreal m_minimumValue;
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qreal m_maximumValue;
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qreal m_value;
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qreal m_windowScale;
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QPoint m_mousePressPos;
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Qt::MouseButtons m_mouseButtons;
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GraphicsHorizontalSlider* m_slider;
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bool m_bScrolling;
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public:
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GraphicsHorizontalScrollbar(QWidget* _parent = nullptr);
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virtual ~GraphicsHorizontalScrollbar();
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void mousePressEvent(QMouseEvent* _event) override;
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void mouseReleaseEvent(QMouseEvent* _event) override;
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void mouseMoveEvent(QMouseEvent* _event) override;
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void resizeEvent(QResizeEvent* _event) override;
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qreal getWindowScale() const;
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qreal minimum() const;
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qreal maximum() const;
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qreal range() const;
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qreal value() const;
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void setValue(qreal _value);
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void setRange(qreal _minValue, qreal _maxValue);
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void setSliderWidth(qreal _width);
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signals:
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void rangeChanged();
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void valueChanged(qreal _value);
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private:
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void onWindowWidthChange(qreal _width);
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}; // END of class GraphicsHorizontalScrollbar.
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//////////////////////////////////////////////////////////////////////////
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#endif // EASY_PROFILER__GRAPHICS_SCROLLBAR__H
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