Move trace view files

[pulseview.git] / pv / views / trace / viewwidget.hpp

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