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pStatGraph.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file pStatGraph.cxx
10 * @author drose
11 * @date 2000-07-19
12 */
13
14#include "pStatGraph.h"
15#include "pStatServer.h"
16#include "pStatFrameData.h"
17#include "pStatCollectorDef.h"
18#include "string_utils.h"
19#include "config_pstatclient.h"
20
21#include <stdio.h> // for sprintf
22
23 using std::string;
24
25/**
26 *
27 */
28PStatGraph::GuideBar::
29GuideBar(double height, const string &label, PStatGraph::GuideBarStyle style) :
30 _height(height),
31 _label(label),
32 _style(style)
33{
34}
35
36/**
37 *
38 */
39PStatGraph::GuideBar::
40GuideBar(const PStatGraph::GuideBar &copy) :
41 _height(copy._height),
42 _label(copy._label),
43 _style(copy._style)
44{
45}
46
47/**
48 *
49 */
50PStatGraph::
51PStatGraph(PStatMonitor *monitor, int xsize, int ysize) :
52 _monitor(monitor),
53 _xsize(xsize),
54 _ysize(ysize)
55{
56 _target_frame_rate = pstats_target_frame_rate;
57 _labels_changed = false;
58 _guide_bars_changed = false;
59 _guide_bar_units = GBU_ms;
60}
61
62/**
63 *
64 */
65PStatGraph::
66~PStatGraph() {
67}
68
69/**
70 * Returns the number of horizontal guide bars that should be drawn, based on
71 * the indicated target frame rate. Not all of these may be visible; some may
72 * be off the top of the chart because of the vertical scale.
73 */
74 int PStatGraph::
75 get_num_guide_bars() const {
76 return _guide_bars.size();
77}
78
79/**
80 * Returns the nth horizontal guide bar. This should be drawn as a horizontal
81 * line across the chart at the y pixel location determined by
82 * height_to_pixel(bar._height).
83 *
84 * It is possible that this bar will be off the top of the chart.
85 */
86 const PStatGraph::GuideBar &PStatGraph::
87 get_guide_bar(int n) const {
88#ifndef NDEBUG
89 static GuideBar bogus_bar(0.0, "bogus", GBS_normal);
90 nassertr(n >= 0 && n < (int)_guide_bars.size(), bogus_bar);
91#endif
92 return _guide_bars[n];
93}
94
95/**
96 * Returns the current number of user-defined guide bars. Not all of these
97 * may be visible.
98 */
99 int PStatGraph::
100 get_num_user_guide_bars() const {
101 return _monitor->get_server()->get_num_user_guide_bars();
102}
103
104/**
105 * Returns the nth user-defined guide bar.
106 */
107 PStatGraph::GuideBar PStatGraph::
108 get_user_guide_bar(int n) const {
109 double height = _monitor->get_server()->get_user_guide_bar_height(n);
110 return make_guide_bar(height, GBS_user);
111}
112
113/**
114 * Adjusts the height of the nth user-defined guide bar.
115 */
116 void PStatGraph::
117 move_user_guide_bar(int n, double height) {
118 _monitor->get_server()->move_user_guide_bar(n, height);
119}
120
121/**
122 * Creates a new user guide bar and returns its index number.
123 */
124 int PStatGraph::
125 add_user_guide_bar(double height) {
126 return _monitor->get_server()->add_user_guide_bar(height);
127}
128
129/**
130 * Removes the user guide bar with the indicated index number. All subsequent
131 * index numbers are adjusted down one.
132 */
133 void PStatGraph::
134 remove_user_guide_bar(int n) {
135 _monitor->get_server()->remove_user_guide_bar(n);
136}
137
138/**
139 * Returns the index number of the first user guide bar found whose height is
140 * within the indicated range, or -1 if no user guide bars fall within the
141 * range.
142 */
143 int PStatGraph::
144 find_user_guide_bar(double from_height, double to_height) const {
145 return _monitor->get_server()->find_user_guide_bar(from_height, to_height);
146}
147
148
149/**
150 * Returns a string representing the value nicely formatted for its range.
151 */
152 string PStatGraph::
153 format_number(double value) {
154 char buffer[128];
155
156 if (value < 0.01) {
157 sprintf(buffer, "%0.4f", value);
158 } else if (value < 0.1) {
159 sprintf(buffer, "%0.3f", value);
160 } else if (value < 1.0) {
161 sprintf(buffer, "%0.2f", value);
162 } else if (value < 10.0) {
163 sprintf(buffer, "%0.1f", value);
164 } else {
165 sprintf(buffer, "%0.0f", value);
166 }
167
168 return buffer;
169}
170
171/**
172 * Returns a string representing the value nicely formatted for its range,
173 * including the units as indicated.
174 */
175 string PStatGraph::
176 format_number(double value, int guide_bar_units, const string &unit_name) {
177 string label;
178
179 if ((guide_bar_units & GBU_named) != 0) {
180 // Units are whatever is specified by unit_name, not a time unit at all.
181 label = format_number(value);
182 if ((guide_bar_units & GBU_show_units) != 0 && !unit_name.empty()) {
183 label += " ";
184 label += unit_name;
185 }
186
187 } else {
188 // Units are either milliseconds or hz, or both.
189 if ((guide_bar_units & GBU_ms) != 0) {
190 double ms = value * 1000.0;
191 label += format_number(ms);
192 if ((guide_bar_units & GBU_show_units) != 0) {
193 label += " ms";
194 }
195 }
196
197 if ((guide_bar_units & GBU_hz) != 0) {
198 double hz = 1.0 / value;
199
200 if ((guide_bar_units & GBU_ms) != 0) {
201 label += " (";
202 }
203 label += format_number(hz);
204 if ((guide_bar_units & GBU_show_units) != 0) {
205 label += " Hz";
206 }
207 if ((guide_bar_units & GBU_ms) != 0) {
208 label += ")";
209 }
210 }
211 }
212
213 return label;
214}
215
216/**
217 * Resets the list of guide bars.
218 */
219 void PStatGraph::
220update_guide_bars(int num_bars, double scale) {
221 _guide_bars.clear();
222
223 // We'd like to draw about num_bars bars on the chart. But we also want the
224 // bars to be harmonics of the target frame rate, so that the bottom bar is
225 // at tfrn or n * tfr, where n is an integer, and the upper bars are even
226 // multiples of that.
227
228 // Choose a suitable harmonic of the target frame rate near the bottom part
229 // of the chart.
230
231 double bottom = (double)num_bars / scale;
232
233 double harmonic;
234 if (_target_frame_rate < bottom) {
235 // n * tfr
236 harmonic = floor(bottom / _target_frame_rate + 0.5) * _target_frame_rate;
237
238 } else {
239 // tfr n
240 harmonic = _target_frame_rate / floor(_target_frame_rate / bottom + 0.5);
241 }
242
243 // Now, make a few bars at k harmonic.
244 for (int k = 1; k / harmonic <= scale; k++) {
245 _guide_bars.push_back(make_guide_bar(k / harmonic));
246 }
247
248 _guide_bars_changed = true;
249}
250
251/**
252 * Makes a guide bar for the indicated elapsed time or level units.
253 */
254 PStatGraph::GuideBar PStatGraph::
255make_guide_bar(double value, PStatGraph::GuideBarStyle style) const {
256 string label = format_number(value, _guide_bar_units, _unit_name);
257
258 if ((style == GBS_normal) &&
259 (_guide_bar_units & GBU_named) == 0) {
260 // If it's a time unit, check to see if it matches our target frame rate.
261 double hz = 1.0 / value;
262 if (IS_THRESHOLD_EQUAL(hz, _target_frame_rate, 0.001)) {
263 style = GBS_target;
264 }
265 }
266
267 return GuideBar(value, label, style);
268}
PStatGraph::GuideBar
Definition pStatGraph.h:57
PStatGraph::get_user_guide_bar
GuideBar get_user_guide_bar(int n) const
Returns the nth user-defined guide bar.
Definition pStatGraph.cxx:108
PStatGraph::find_user_guide_bar
int find_user_guide_bar(double from_height, double to_height) const
Returns the index number of the first user guide bar found whose height is within the indicated range...
Definition pStatGraph.cxx:144
PStatGraph::get_num_user_guide_bars
int get_num_user_guide_bars() const
Returns the current number of user-defined guide bars.
Definition pStatGraph.cxx:100
PStatGraph::add_user_guide_bar
int add_user_guide_bar(double height)
Creates a new user guide bar and returns its index number.
Definition pStatGraph.cxx:125
PStatGraph::move_user_guide_bar
void move_user_guide_bar(int n, double height)
Adjusts the height of the nth user-defined guide bar.
Definition pStatGraph.cxx:117
PStatGraph::remove_user_guide_bar
void remove_user_guide_bar(int n)
Removes the user guide bar with the indicated index number.
Definition pStatGraph.cxx:134
PStatGraph::get_num_guide_bars
int get_num_guide_bars() const
Returns the number of horizontal guide bars that should be drawn, based on the indicated target frame...
Definition pStatGraph.cxx:75
PStatGraph::format_number
static std::string format_number(double value)
Returns a string representing the value nicely formatted for its range.
Definition pStatGraph.cxx:153
PStatGraph::get_guide_bar
const GuideBar & get_guide_bar(int n) const
Returns the nth horizontal guide bar.
Definition pStatGraph.cxx:87
PStatMonitor
This is an abstract class that presents the interface to any number of different front-ends for the s...
Definition pStatMonitor.h:39
config_pstatclient.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pStatCollectorDef.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pStatFrameData.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pStatGraph.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pStatServer.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
string_utils.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.