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112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
#ifndef RenderWidgetH
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#define RenderWidgetH
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//============================================================================
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/// \file RenderWidget.h
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/// \author Uwe Kindler
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/// \date 04.11.2022
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/// \brief Declaration of CRenderWidget
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//============================================================================
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//============================================================================
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// INCLUDES
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//============================================================================
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#include <QWidget>
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#include <QPixmap>
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//============================================================================
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// FORWARD DECLARATIONS
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//============================================================================
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class QImage;
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/**
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* @brief Widget for fast display of images (i.e. for video capture devices)
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*/
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class CRenderWidget : public QWidget
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{
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Q_OBJECT
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private:
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QPixmap m_Image;
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double m_ScaleFactor;
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protected:
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/**
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* @brief Reimplemented paint event method showing actual image.
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*/
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void paintEvent(QPaintEvent* PaintEvent);
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/**
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* @brief Change scale factor
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*/
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void scaleImage(double ScaleFactor);
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/**
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* @brief Adjust widget size to size of image.
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*/
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void adjustWidgetSize();
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public:
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/**
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* Constructor
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* @param[in] Parent Parent widget.
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*/
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CRenderWidget(QWidget* Parent);
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/**
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* Destructor
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*/
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virtual ~CRenderWidget();
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signals:
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/**
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* @brief Signalize change of captured image size.
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* @param ImageSize New image size.
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*/
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void imageSizeChanged(const QSize& ImageSize);
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public slots:
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/**
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* @brief Show new image in render widget.
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*/
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void showImage(const QImage& Image);
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/**
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* @brief Zoom into the scene.
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* This function decreases the scaling factor by setting it to the previous
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* value in internal scaling list.
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* @brief Steps The number of steps to zoom in. One step is 25%.
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*/
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void zoomIn();
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/**
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* @brief Zoom out of the scene.
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* This function decreases the scaling factor by setting it to the next
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* value in internal scaling list.
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* @brief Steps The number of steps to zoom out. One step is 25%.
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*/
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void zoomOut();
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/**
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* @brief Change zoom by zoom value.
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* @param[in] ZoomValue This is the zoom value to apply. A value of 1
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* means no change a value > 1 increases the image (i.e. 1.25 would increase
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* the image by 25%) and a value of < 1 decreases the image size (i.e.
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* a value of 0.8 would decrease the image size by 25%).
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*/
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void zoomByValue(double ZoomValue);
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/**
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* @brief Resets the actual scaling to 1 and display the image with its
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* actual pixel size.
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*/
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void normalSize();
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/**
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* @brief Scales the wiget and its content image to the given TargetSize
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*/
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void scaleToSize(const QSize& TargetSize);
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}; // class CRenderWidget
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//---------------------------------------------------------------------------
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#endif // RenderWidgetH
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