X-Git-Url: http://git.code-monkey.de/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fviews%2Ftrace%2Fviewwidget.hpp;fp=pv%2Fviews%2Ftrace%2Fviewwidget.hpp;h=e4fb73c8255debedb73963acddc0984e635a0433;hp=0000000000000000000000000000000000000000;hb=1573bf16ba50d1c023ad3a9ce596f0ab6eaeacff;hpb=4c7a19d3d7049bcc9fb3185ce2bc91333a7ca9e1

diff --git a/pv/views/trace/viewwidget.hpp b/pv/views/trace/viewwidget.hpp
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+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PULSEVIEW_PV_VIEWWIDGET_HPP
+#define PULSEVIEW_PV_VIEWWIDGET_HPP
+
+#include <memory>
+
+#include <QWidget>
+
+using std::shared_ptr;
+using std::vector;
+
+class QTouchEvent;
+
+namespace pv {
+namespace views {
+namespace trace {
+
+class View;
+class ViewItem;
+
+class ViewWidget : public QWidget
+{
+	Q_OBJECT
+
+protected:
+	ViewWidget(View &parent);
+
+	/**
+	 * Indicates when a view item is being hovered over.
+	 * @param item The item that is being hovered over, or @c nullptr
+	 * if no view item is being hovered over.
+	 * @remarks the default implementation does nothing.
+	 */
+	virtual void item_hover(const shared_ptr<ViewItem> &item);
+
+	/**
+	 * Indicates the event an a view item has been clicked.
+	 * @param item the view item that has been clicked.
+	 * @remarks the default implementation does nothing.
+	 */
+	virtual void item_clicked(const shared_ptr<ViewItem> &item);
+
+	/**
+	 * Returns true if the selection of row items allows dragging.
+	 * @return Returns true if the drag is acceptable.
+	 */
+	bool accept_drag() const;
+
+	/**
+	 * Returns true if the mouse button is down.
+	 */
+	bool mouse_down() const;
+
+	/**
+	 * Drag the dragging items by the delta offset.
+	 * @param delta the drag offset in pixels.
+	 */
+	void drag_items(const QPoint &delta);
+
+	/**
+	 * Sets this item into the dragged state.
+	 */
+	virtual void drag();
+
+	/**
+	 * Drag the background by the delta offset.
+	 * @param delta the drag offset in pixels.
+	 * @remarks The default implementation does nothing.
+	 */
+	virtual void drag_by(const QPoint &delta);
+
+	/**
+	 * Sets this item into the un-dragged state.
+	 */
+	virtual void drag_release();
+
+	/**
+	 * Gets the items in the view widget.
+	 */
+	virtual vector< shared_ptr<ViewItem> > items() = 0;
+
+	/**
+	 * Gets the first view item which has a hit-box that contains @c pt .
+	 * @param pt the point to search with.
+	 * @return the view item that has been found, or and empty
+	 *   @c shared_ptr if no item was found.
+	 */
+	virtual shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt) = 0;
+
+	/**
+	 * Handles left mouse button press events.
+	 * @param event the mouse event that triggered this handler.
+	 */
+	void mouse_left_press_event(QMouseEvent *event);
+
+	/**
+	 * Handles left mouse button release events.
+	 * @param event the mouse event that triggered this handler.
+	 */
+	void mouse_left_release_event(QMouseEvent *event);
+
+	/**
+	 * Handles touch begin update and end events.
+	 * @param e the event that triggered this handler.
+	 */
+	virtual bool touch_event(QTouchEvent *event);
+
+protected:
+	bool event(QEvent *event);
+
+	void mousePressEvent(QMouseEvent *event);
+	void mouseReleaseEvent(QMouseEvent *event);
+	void mouseMoveEvent(QMouseEvent *event);
+
+	void leaveEvent(QEvent *event);
+
+public Q_SLOTS:
+	void clear_selection();
+
+Q_SIGNALS:
+	void selection_changed();
+
+protected:
+	pv::views::trace::View &view_;
+	QPoint mouse_point_;
+	QPoint mouse_down_point_;
+	shared_ptr<ViewItem> mouse_down_item_;
+	bool item_dragging_;
+};
+
+} // namespace trace
+} // namespace views
+} // namespace pv
+
+#endif // PULSEVIEW_PV_VIEWWIDGET_HPP