Pave.

gui/groupview/GroupView.h

@@ -0,0 +1,139 @@
+#pragma once
+
+#include <QListView>
+#include <QLineEdit>
+#include <QScrollBar>
+
+struct GroupViewRoles
+{
+	enum
+	{
+		GroupRole = Qt::UserRole,
+		ProgressValueRole,
+		ProgressMaximumRole
+	};
+};
+
+struct Group;
+
+class GroupView : public QAbstractItemView
+{
+	Q_OBJECT
+
+public:
+	GroupView(QWidget *parent = 0);
+	~GroupView();
+
+	QRect geometryRect(const QModelIndex &index) const;
+	virtual QRect visualRect(const QModelIndex &index) const override;
+	QModelIndex indexAt(const QPoint &point) const;
+	void setSelection(const QRect &rect,
+					  const QItemSelectionModel::SelectionFlags commands) override;
+
+	virtual int horizontalOffset() const override
+	{
+		return horizontalScrollBar()->value();
+	}
+
+	virtual int verticalOffset() const override
+	{
+		return verticalScrollBar()->value();
+	}
+
+	virtual void scrollContentsBy(int dx, int dy) override
+	{
+		scrollDirtyRegion(dx, dy);
+		viewport()->scroll(dx, dy);
+	}
+
+	/*
+	 * TODO!
+	 */
+	virtual void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override
+	{
+		return;
+	}
+
+	virtual QModelIndex moveCursor(CursorAction cursorAction,
+								   Qt::KeyboardModifiers modifiers) override;
+
+	virtual QRegion visualRegionForSelection(const QItemSelection &selection) const override;
+
+protected
+slots:
+	virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
+							 const QVector<int> &roles) override;
+	virtual void rowsInserted(const QModelIndex &parent, int start, int end) override;
+	virtual void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) override;
+	virtual void updateGeometries() override;
+
+protected:
+	virtual bool isIndexHidden(const QModelIndex &index) const override;
+	void mousePressEvent(QMouseEvent *event) override;
+	void mouseMoveEvent(QMouseEvent *event) override;
+	void mouseReleaseEvent(QMouseEvent *event) override;
+	void mouseDoubleClickEvent(QMouseEvent *event) override;
+	void paintEvent(QPaintEvent *event) override;
+	void resizeEvent(QResizeEvent *event) override;
+
+	void dragEnterEvent(QDragEnterEvent *event) override;
+	void dragMoveEvent(QDragMoveEvent *event) override;
+	void dragLeaveEvent(QDragLeaveEvent *event) override;
+	void dropEvent(QDropEvent *event) override;
+
+	void startDrag(Qt::DropActions supportedActions) override;
+
+private:
+	friend struct Group;
+
+	QList<Group *> m_groups;
+
+	int m_leftMargin;
+	int m_rightMargin;
+	int m_bottomMargin;
+	int m_categoryMargin;
+
+	// bool m_updatesDisabled;
+
+	Group *category(const QModelIndex &index) const;
+	Group *category(const QString &cat) const;
+	Group *categoryAt(const QPoint &pos) const;
+
+	int itemsPerRow() const;
+	int contentWidth() const;
+
+private:
+	int itemWidth() const;
+	int categoryRowHeight(const QModelIndex &index) const;
+
+	/*QLineEdit *m_categoryEditor;
+	Category *m_editedCategory;
+	void startCategoryEditor(Category *category);
+
+private slots:
+	void endCategoryEditor();*/
+
+private: /* variables */
+	QPoint m_pressedPosition;
+	QPersistentModelIndex m_pressedIndex;
+	bool m_pressedAlreadySelected;
+	Group *m_pressedCategory;
+	QItemSelectionModel::SelectionFlag m_ctrlDragSelectionFlag;
+	QPoint m_lastDragPosition;
+	int m_spacing = 5;
+
+private: /* methods */
+	QPair<int, int> categoryInternalPosition(const QModelIndex &index) const;
+	int categoryInternalRowTop(const QModelIndex &index) const;
+	int itemHeightForCategoryRow(const Group *category, const int internalRow) const;
+
+	QPixmap renderToPixmap(const QModelIndexList &indices, QRect *r) const;
+	QList<QPair<QRect, QModelIndex>> draggablePaintPairs(const QModelIndexList &indices,
+														 QRect *r) const;
+
+	bool isDragEventAccepted(QDropEvent *event);
+
+	QPair<Group *, int> rowDropPos(const QPoint &pos);
+
+	QPoint offset() const;
+};