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, see <http://www.gnu.org/licenses/>.
20 #ifndef PULSEVIEW_PV_VIEWWIDGET_HPP
21 #define PULSEVIEW_PV_VIEWWIDGET_HPP
28 using std::shared_ptr;
40 class ViewWidget : public QWidget
45 ViewWidget(View &parent);
48 * Indicates when a view item is being hovered over.
49 * @param item The item that is being hovered over, or @c nullptr
50 * if no view item is being hovered over.
51 * @remarks the default implementation does nothing.
53 virtual void item_hover(const shared_ptr<ViewItem> &item, QPoint pos);
56 * Indicates the event an a view item has been clicked.
57 * @param item the view item that has been clicked.
58 * @remarks the default implementation does nothing.
60 virtual void item_clicked(const shared_ptr<ViewItem> &item);
63 * Returns true if the selection of row items allows dragging.
64 * @return Returns true if the drag is acceptable.
66 bool accept_drag() const;
69 * Returns true if the mouse button is down.
71 bool mouse_down() const;
74 * Drag the dragging items by the delta offset.
75 * @param delta the drag offset in pixels.
77 void drag_items(const QPoint &delta);
80 * Sets this item into the dragged state.
85 * Drag the background by the delta offset.
86 * @param delta the drag offset in pixels.
87 * @remarks The default implementation does nothing.
89 virtual void drag_by(const QPoint &delta);
92 * Sets this item into the un-dragged state.
94 virtual void drag_release();
97 * Gets the items in the view widget.
99 virtual vector< shared_ptr<ViewItem> > items() = 0;
102 * Gets the first view item which has a hit-box that contains @c pt .
103 * @param pt the point to search with.
104 * @return the view item that has been found, or and empty
105 * @c shared_ptr if no item was found.
107 virtual shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt) = 0;
110 * Handles left mouse button press events.
111 * @param event the mouse event that triggered this handler.
113 void mouse_left_press_event(QMouseEvent *event);
116 * Handles left mouse button release events.
117 * @param event the mouse event that triggered this handler.
119 void mouse_left_release_event(QMouseEvent *event);
122 * Handles touch begin update and end events.
123 * @param e the event that triggered this handler.
125 virtual bool touch_event(QTouchEvent *event);
128 bool event(QEvent *event);
130 void mousePressEvent(QMouseEvent *event);
131 void mouseReleaseEvent(QMouseEvent *event);
132 void mouseMoveEvent(QMouseEvent *event);
134 void leaveEvent(QEvent *event);
137 void clear_selection();
140 void selection_changed();
143 pv::views::trace::View &view_;
145 QPoint mouse_down_point_;
146 shared_ptr<ViewItem> mouse_down_item_;
154 #endif // PULSEVIEW_PV_VIEWWIDGET_HPP