6b5f364864
FloatingDragPreview.cpp: moved code from moveEvent into moveFloating function to remove indirection and to simplify code Moved code from moveEvent() function into moveFloating() to remove indirection and to simplify code Implemented Windows drag handling with native WM_ nonclient area messages
109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
#ifndef FloatingDragPreviewH
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#define FloatingDragPreviewH
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//============================================================================
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/// \file FloatingDragPreview.h
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/// \author Uwe Kindler
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/// \date 26.11.2019
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/// \brief Declaration of CFloatingDragPreview
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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 "FloatingDockContainer.h"
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namespace ads
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{
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class CDockWidget;
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class CDockAreaWidget;
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struct FloatingDragPreviewPrivate;
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/**
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* A floating overlay is a temporary floating widget that is just used to
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* indicate the floating widget movement.
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* This widget is used as a placeholder for drag operations for non-opaque
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* docking
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*/
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class CFloatingDragPreview : public QWidget, public IFloatingWidget
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{
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Q_OBJECT
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private:
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FloatingDragPreviewPrivate* d;
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friend struct FloatingDragPreviewPrivate;
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private slots:
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/**
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* Cancel non opaque undocking if application becomes inactive
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*/
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void onApplicationStateChanged(Qt::ApplicationState state);
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protected:
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/**
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* Cares about painting the
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*/
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virtual void paintEvent(QPaintEvent *e) override;
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/**
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* The content is a DockArea or a DockWidget
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*/
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CFloatingDragPreview(QWidget* Content, QWidget* parent);
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public:
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using Super = QWidget;
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/**
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* Creates an instance for undocking the DockWidget in Content parameter
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*/
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CFloatingDragPreview(CDockWidget* Content);
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/**
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* Creates an instance for undocking the DockArea given in Content
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* parameters
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*/
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CFloatingDragPreview(CDockAreaWidget* Content);
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/**
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* Delete private data
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*/
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~CFloatingDragPreview();
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/**
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* We filter the events of the assigned content widget to receive
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* escape key presses for canceling the drag operation
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*/
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virtual bool eventFilter(QObject *watched, QEvent *event) override;
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public: // implements IFloatingWidget -----------------------------------------
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virtual void startFloating(const QPoint& DragStartMousePos, const QSize& Size,
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eDragState DragState, QWidget* MouseEventHandler) override;
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/**
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* Moves the widget to a new position relative to the position given when
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* startFloating() was called
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*/
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virtual void moveFloating() override;
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/**
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* Finishes dragging.
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* Hides the dock overlays and executes the real undocking and docking
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* of the assigned Content widget
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*/
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virtual void finishDragging() override;
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signals:
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/**
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* This signal is emitted, if dragging has been canceled by escape key
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* or by active application switching via task manager
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*/
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void draggingCanceled();
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};
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} // namespace ads
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//---------------------------------------------------------------------------
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#endif // FloatingDragPreviewH
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