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https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System.git
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104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
#ifndef DROP_OVERLAY_H
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#define DROP_OVERLAY_H
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#include <QPointer>
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#include <QHash>
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#include <QRect>
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#include <QFrame>
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class QGridLayout;
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#include "ads/API.h"
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ADS_NAMESPACE_BEGIN
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class DropOverlayCross;
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/*!
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* DropOverlay paints a translucent rectangle over another widget. The geometry
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* of the rectangle is based on the mouse location.
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*/
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class ADS_EXPORT_API DropOverlay : public QFrame
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{
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Q_OBJECT
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friend class DropOverlayCross;
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public:
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enum eMode
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{
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ModeSectionOverlay,
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ModeContainerOverlay
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};
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DropOverlay(QWidget* parent, eMode Mode = ModeSectionOverlay);
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virtual ~DropOverlay();
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void setAllowedAreas(DropAreas areas);
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/**
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* Returns flags with all allowed drop areas
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*/
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DropAreas allowedAreas() const;
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/**
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* Returns the drop area under the current cursor location
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*/
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DropArea dropAreaUnderCursor() const;
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DropArea showDropOverlay(QWidget* target);
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void showDropOverlay(QWidget* target, const QRect& targetAreaRect);
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void hideDropOverlay();
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/**
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* Creates a drop indicator widget for the given drop area
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*/
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static QWidget* createDropIndicatorWidget(DropArea dropArea);
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protected:
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virtual void paintEvent(QPaintEvent *e);
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virtual void showEvent(QShowEvent* e);
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virtual void hideEvent(QHideEvent* e);
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virtual void resizeEvent(QResizeEvent* e);
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virtual void moveEvent(QMoveEvent* e);
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private:
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DropAreas _allowedAreas;
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DropOverlayCross* _cross;
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QPointer<QWidget> _target;
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QRect _targetRect;
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DropArea _lastLocation;
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};
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/*!
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* DropOverlayCross shows a cross with 5 different drop area possibilities.
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* I could have handled everything inside DropOverlay, but because of some
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* styling issues it's better to have a separate class for the cross.
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*/
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class DropOverlayCross : public QWidget
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{
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Q_OBJECT
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friend class DropOverlay;
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public:
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DropOverlayCross(DropOverlay* overlay);
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virtual ~DropOverlayCross();
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DropArea cursorLocation() const;
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void setupOverlayCross(DropOverlay::eMode Mode);
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protected:
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virtual void showEvent(QShowEvent* e);
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void setAreaWidgets(const QHash<DropArea, QWidget*>& widgets);
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private:
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void reset();
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QPoint areaGridPosition(const DropArea area);
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private:
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DropOverlay::eMode m_Mode = DropOverlay::ModeSectionOverlay;
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DropOverlay* m_DropOverlay;
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QHash<DropArea, QWidget*> m_DropIndicatorWidgets;
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QGridLayout* m_GridLayout;
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};
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ADS_NAMESPACE_END
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#endif
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