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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | #ifndef PULSEVIEW_PV_VIEW_RULER_HPP | |
22 | #define PULSEVIEW_PV_VIEW_RULER_HPP | |
23 | ||
24 | #include <functional> | |
25 | #include <memory> | |
26 | ||
27 | #include <boost/optional.hpp> | |
28 | ||
29 | #include "marginwidget.hpp" | |
30 | #include <pv/util.hpp> | |
31 | ||
32 | namespace RulerTest { | |
33 | class tick_position_test_0; | |
34 | class tick_position_test_1; | |
35 | class tick_position_test_2; | |
36 | } | |
37 | ||
38 | namespace pv { | |
39 | namespace view { | |
40 | ||
41 | class TimeItem; | |
42 | class ViewItem; | |
43 | ||
44 | class Ruler : public MarginWidget | |
45 | { | |
46 | Q_OBJECT | |
47 | ||
48 | friend class RulerTest::tick_position_test_0; | |
49 | friend class RulerTest::tick_position_test_1; | |
50 | friend class RulerTest::tick_position_test_2; | |
51 | ||
52 | private: | |
53 | ||
54 | /// Height of the ruler in multipes of the text height | |
55 | static const float RulerHeight; | |
56 | ||
57 | static const int MinorTickSubdivision; | |
58 | ||
59 | /// Height of the hover arrow in multiples of the text height | |
60 | static const float HoverArrowSize; | |
61 | ||
62 | public: | |
63 | Ruler(View &parent); | |
64 | ||
65 | public: | |
66 | QSize sizeHint() const; | |
67 | ||
68 | /** | |
69 | * The extended area that the header widget would like to be sized to. | |
70 | * @remarks This area is the area specified by sizeHint, extended by | |
71 | * the area to overlap the viewport. | |
72 | */ | |
73 | QSize extended_size_hint() const; | |
74 | ||
75 | private: | |
76 | /** | |
77 | * Gets the time items. | |
78 | */ | |
79 | std::vector< std::shared_ptr<pv::view::ViewItem> > items(); | |
80 | ||
81 | /** | |
82 | * Gets the first view item which has a label that contains @c pt . | |
83 | * @param pt the point to search with. | |
84 | * @return the view item that has been found, or and empty | |
85 | * @c shared_ptr if no item was found. | |
86 | */ | |
87 | std::shared_ptr<pv::view::ViewItem> get_mouse_over_item( | |
88 | const QPoint &pt); | |
89 | ||
90 | private: | |
91 | void paintEvent(QPaintEvent *event); | |
92 | ||
93 | void mouseDoubleClickEvent(QMouseEvent *e); | |
94 | ||
95 | /** | |
96 | * Draw a hover arrow under the cursor position. | |
97 | * @param p The painter to draw into. | |
98 | * @param text_height The height of a single text ascent. | |
99 | */ | |
100 | void draw_hover_mark(QPainter &p, int text_height); | |
101 | ||
102 | int calculate_text_height() const; | |
103 | ||
104 | struct TickPositions | |
105 | { | |
106 | std::vector<std::pair<double, QString>> major; | |
107 | std::vector<double> minor; | |
108 | }; | |
109 | ||
110 | /** | |
111 | * Holds the tick positions so that they don't have to be recalculated on | |
112 | * every redraw. Set by 'paintEvent()' when needed. | |
113 | */ | |
114 | boost::optional<TickPositions> tick_position_cache_; | |
115 | ||
116 | /** | |
117 | * Calculates the major and minor tick positions. | |
118 | * | |
119 | * @param major_period The period between the major ticks. | |
120 | * @param offset The time at the left border of the ruler. | |
121 | * @param scale The scale in seconds per pixel. | |
122 | * @param width the Width of the ruler. | |
123 | * @param format_function A function used to format the major tick times. | |
124 | * @return An object of type 'TickPositions' that contains the major tick | |
125 | * positions together with the labels at that ticks, and the minor | |
126 | * tick positions. | |
127 | */ | |
128 | static TickPositions calculate_tick_positions( | |
129 | const pv::util::Timestamp& major_period, | |
130 | const pv::util::Timestamp& offset, | |
131 | const double scale, | |
132 | const int width, | |
133 | std::function<QString(const pv::util::Timestamp&)> format_function); | |
134 | ||
135 | protected: | |
136 | void resizeEvent(QResizeEvent*) override; | |
137 | ||
138 | private Q_SLOTS: | |
139 | void hover_point_changed(); | |
140 | ||
141 | // Resets the 'tick_position_cache_'. | |
142 | void invalidate_tick_position_cache(); | |
143 | }; | |
144 | ||
145 | } // namespace view | |
146 | } // namespace pv | |
147 | ||
148 | #endif // PULSEVIEW_PV_VIEW_RULER_HPP |