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126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
#pragma once
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#include <QListView>
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#include <QLineEdit>
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#include <QScrollBar>
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#include <QCache>
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struct GroupViewRoles
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{
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enum
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{
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GroupRole = Qt::UserRole,
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ProgressValueRole,
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ProgressMaximumRole
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};
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};
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struct VisualGroup;
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class GroupView : public QAbstractItemView
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{
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Q_OBJECT
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public:
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GroupView(QWidget *parent = 0);
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~GroupView();
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void setModel(QAbstractItemModel *model) override;
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/// return geometry rectangle occupied by the specified model item
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QRect geometryRect(const QModelIndex &index) const;
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/// return visual rectangle occupied by the specified model item
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virtual QRect visualRect(const QModelIndex &index) const override;
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/// get the model index at the specified visual point
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virtual QModelIndex indexAt(const QPoint &point) const override;
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void setSelection(const QRect &rect,
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const QItemSelectionModel::SelectionFlags commands) override;
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virtual int horizontalOffset() const override;
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virtual int verticalOffset() const override;
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virtual void scrollContentsBy(int dx, int dy) override;
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virtual void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
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virtual QModelIndex moveCursor(CursorAction cursorAction,
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Qt::KeyboardModifiers modifiers) override;
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virtual QRegion visualRegionForSelection(const QItemSelection &selection) const override;
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int spacing() const
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{
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return m_spacing;
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};
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protected
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slots:
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virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
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const QVector<int> &roles) override;
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virtual void rowsInserted(const QModelIndex &parent, int start, int end) override;
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virtual void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override;
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virtual void updateGeometries() override;
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void modelReset();
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protected:
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virtual bool isIndexHidden(const QModelIndex &index) const override;
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void mousePressEvent(QMouseEvent *event) override;
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void mouseMoveEvent(QMouseEvent *event) override;
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void mouseReleaseEvent(QMouseEvent *event) override;
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void mouseDoubleClickEvent(QMouseEvent *event) override;
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void paintEvent(QPaintEvent *event) override;
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void resizeEvent(QResizeEvent *event) override;
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void dragEnterEvent(QDragEnterEvent *event) override;
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void dragMoveEvent(QDragMoveEvent *event) override;
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void dragLeaveEvent(QDragLeaveEvent *event) override;
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void dropEvent(QDropEvent *event) override;
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void startDrag(Qt::DropActions supportedActions) override;
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private:
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friend struct VisualGroup;
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QList<VisualGroup *> m_groups;
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// geometry
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int m_leftMargin = 5;
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int m_rightMargin = 5;
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int m_bottomMargin = 5;
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int m_categoryMargin = 5;
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int m_spacing = 5;
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int m_itemWidth = 100;
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int m_currentItemsPerRow = -1;
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int m_currentCursorColumn= -1;
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mutable QCache<int, QRect> geometryCache;
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// point where the currently active mouse action started in geometry coordinates
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QPoint m_pressedPosition;
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QPersistentModelIndex m_pressedIndex;
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bool m_pressedAlreadySelected;
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VisualGroup *m_pressedCategory;
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QItemSelectionModel::SelectionFlag m_ctrlDragSelectionFlag;
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QPoint m_lastDragPosition;
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VisualGroup *category(const QModelIndex &index) const;
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VisualGroup *category(const QString &cat) const;
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VisualGroup *categoryAt(const QPoint &pos) const;
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int itemsPerRow() const
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{
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return m_currentItemsPerRow;
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};
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int contentWidth() const;
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private: /* methods */
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int itemWidth() const;
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int calculateItemsPerRow() const;
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int verticalScrollToValue(const QModelIndex &index, const QRect &rect,
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QListView::ScrollHint hint) const;
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QPixmap renderToPixmap(const QModelIndexList &indices, QRect *r) const;
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QList<QPair<QRect, QModelIndex>> draggablePaintPairs(const QModelIndexList &indices,
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QRect *r) const;
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bool isDragEventAccepted(QDropEvent *event);
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QPair<VisualGroup *, int> rowDropPos(const QPoint &pos);
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QPoint offset() const;
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};
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