2 * This file is part of the PulseView project.
4 * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef PULSEVIEW_PV_VIEWWIDGET_HPP
22 #define PULSEVIEW_PV_VIEWWIDGET_HPP
41 class ViewWidget : public QWidget
46 ViewWidget(View &parent);
49 * Indicates when a view item is being hovered over.
50 * @param item The item that is being hovered over, or @c nullptr
51 * if no view item is being hovered over.
52 * @remarks the default implementation does nothing.
54 virtual void item_hover(
55 const std::shared_ptr<pv::view::ViewItem> &item);
58 * Indicates the event an a view item has been clicked.
59 * @param item the view item that has been clicked.
60 * @remarks the default implementation does nothing.
62 virtual void item_clicked(
63 const std::shared_ptr<pv::view::ViewItem> &item);
66 * Returns true if the selection of row items allows dragging.
67 * @return Returns true if the drag is acceptable.
69 bool accept_drag() const;
72 * Returns true if the mouse button is down.
74 bool mouse_down() const;
77 * Drag the dragging items by the delta offset.
78 * @param delta the drag offset in pixels.
80 void drag_items(const QPoint &delta);
83 * Sets this item into the dragged state.
88 * Drag the background by the delta offset.
89 * @param delta the drag offset in pixels.
90 * @remarks The default implementation does nothing.
92 virtual void drag_by(const QPoint &delta);
95 * Sets this item into the un-dragged state.
97 virtual void drag_release();
100 * Gets the items in the view widget.
102 virtual std::vector< std::shared_ptr<pv::view::ViewItem> > items() = 0;
105 * Gets the first view item which has a hit-box that contains @c pt .
106 * @param pt the point to search with.
107 * @return the view item that has been found, or and empty
108 * @c shared_ptr if no item was found.
110 virtual std::shared_ptr<pv::view::ViewItem> get_mouse_over_item(
111 const QPoint &pt) = 0;
114 * Handles left mouse button press events.
115 * @param event the mouse event that triggered this handler.
117 void mouse_left_press_event(QMouseEvent *event);
120 * Handles left mouse button release events.
121 * @param event the mouse event that triggered this handler.
123 void mouse_left_release_event(QMouseEvent *event);
126 * Handles touch begin update and end events.
127 * @param e the event that triggered this handler.
129 virtual bool touch_event(QTouchEvent *event);
132 bool event(QEvent *event);
134 void mousePressEvent(QMouseEvent *event);
135 void mouseReleaseEvent(QMouseEvent *event);
136 void mouseMoveEvent(QMouseEvent *event);
138 void leaveEvent(QEvent *event);
141 void clear_selection();
144 void selection_changed();
147 pv::view::View &view_;
149 QPoint mouse_down_point_;
150 std::shared_ptr<ViewItem> mouse_down_item_;
157 #endif // PULSEVIEW_PV_VIEWWIDGET_HPP