Ticket #9872: report-mq2NP5.html

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4<title>/boot/home/haiku/haiku/src/preferences/cpufrequency/ColorStepView.cpp</title>
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56<body>
57<!-- BUGDESC Division by zero -->
58
59<!-- BUGTYPE Division by zero -->
60
61<!-- BUGCATEGORY Logic error -->
62
63<!-- BUGFILE /boot/home/haiku/haiku/src/preferences/cpufrequency/ColorStepView.cpp -->
64
65<!-- BUGLINE 330 -->
66
67<!-- BUGPATHLENGTH 7 -->
68
69<!-- BUGMETAEND -->
70<!-- REPORTHEADER -->
71<h3>Bug Summary</h3>
72<table class="simpletable">
73<tr><td class="rowname">File:</td><td>/boot/home/haiku/haiku/src/preferences/cpufrequency/ColorStepView.cpp</td></tr>
74<tr><td class="rowname">Location:</td><td><a href="#EndPath">line 330, column 7</a></td></tr>
75<tr><td class="rowname">Description:</td><td>Division by zero</td></tr>
76</table>
77<!-- REPORTSUMMARYEXTRA -->
78<h3>Annotated Source Code</h3>
79<table class="code">
80<tr><td class="num" id="LN1">1</td><td class="line"><span class='comment'>/*</span></td></tr>
81<tr><td class="num" id="LN2">2</td><td class="line"> <span class='comment'>* Copyright 2009, Haiku, Inc. All Rights Reserved.</span></td></tr>
82<tr><td class="num" id="LN3">3</td><td class="line"> <span class='comment'>* Distributed under the terms of the MIT License.</span></td></tr>
83<tr><td class="num" id="LN4">4</td><td class="line"> <span class='comment'>*</span></td></tr>
84<tr><td class="num" id="LN5">5</td><td class="line"> <span class='comment'>* Authors:</span></td></tr>
85<tr><td class="num" id="LN6">6</td><td class="line"> <span class='comment'>* Clemens Zeidler, haiku@clemens-zeidler.de</span></td></tr>
86<tr><td class="num" id="LN7">7</td><td class="line"> <span class='comment'>*/</span></td></tr>
87<tr><td class="num" id="LN8">8</td><td class="line"> </td></tr>
88<tr><td class="num" id="LN9">9</td><td class="line"><span class='directive'>#include "ColorStepView.h"</span></td></tr>
89<tr><td class="num" id="LN10">10</td><td class="line"> </td></tr>
90<tr><td class="num" id="LN11">11</td><td class="line"><span class='directive'>#include &lt;stdio.h&gt;</span></td></tr>
91<tr><td class="num" id="LN12">12</td><td class="line"> </td></tr>
92<tr><td class="num" id="LN13">13</td><td class="line"><span class='directive'>#include &lt;Catalog.h&gt;</span></td></tr>
93<tr><td class="num" id="LN14">14</td><td class="line"><span class='directive'>#include &lt;Locale.h&gt;</span></td></tr>
94<tr><td class="num" id="LN15">15</td><td class="line"><span class='directive'>#include &lt;Window.h&gt;</span></td></tr>
95<tr><td class="num" id="LN16">16</td><td class="line"> </td></tr>
96<tr><td class="num" id="LN17">17</td><td class="line"> </td></tr>
97<tr><td class="num" id="LN18">18</td><td class="line"><span class='directive'>#undef <span class='macro'>B_TRANSLATION_CONTEXT<span class='expansion'>"Color Step View"</span></span></span></td></tr>
98<tr><td class="num" id="LN19">19</td><td class="line"><span class='directive'>#define <span class='macro'>B_TRANSLATION_CONTEXT<span class='expansion'>"Color Step View"</span></span> "Color Step View"</span></td></tr>
99<tr><td class="num" id="LN20">20</td><td class="line"> </td></tr>
100<tr><td class="num" id="LN21">21</td><td class="line"> </td></tr>
101<tr><td class="num" id="LN22">22</td><td class="line"><span class='keyword'>const</span> int32 kColorBarHeight = 15;</td></tr>
102<tr><td class="num" id="LN23">23</td><td class="line"> </td></tr>
103<tr><td class="num" id="LN24">24</td><td class="line"><span class='keyword'>const</span> uint32 kMSGSliderChanged = '&amp;slc';</td></tr>
104<tr><td class="num" id="LN25">25</td><td class="line"> </td></tr>
105<tr><td class="num" id="LN26">26</td><td class="line"> </td></tr>
106<tr><td class="num" id="LN27">27</td><td class="line">ColorStepView::ColorStepView(BRect frame)</td></tr>
107<tr><td class="num" id="LN28">28</td><td class="line"> : BControl(frame, <span class='string_literal'>"ColorStepView"</span>, <span class='string_literal'>""</span>, <span class='keyword'>new</span> BMessage(kSteppingChanged),</td></tr>
108<tr><td class="num" id="LN29">29</td><td class="line"> <span class='macro'>B_FOLLOW_ALL<span class='expansion'>_rule_(_VIEW_TOP_, _VIEW_LEFT_, _VIEW_BOTTOM_, _VIEW_RIGHT_)</span></span>, B_WILL_DRAW),</td></tr>
109<tr><td class="num" id="LN30">30</td><td class="line"> fOffScreenView(<span class='macro'>NULL<span class='expansion'>__null</span></span>),</td></tr>
110<tr><td class="num" id="LN31">31</td><td class="line"> fOffScreenBitmap(<span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
111<tr><td class="num" id="LN32">32</td><td class="line">{</td></tr>
112<tr><td class="num" id="LN33">33</td><td class="line"> fPerformanceList = <span class='keyword'>new</span> PerformanceList(20, <span class='keyword'>true</span>);</td></tr>
113<tr><td class="num" id="LN34">34</td><td class="line"> </td></tr>
114<tr><td class="num" id="LN35">35</td><td class="line"> fSliderPosition = 0;</td></tr>
115<tr><td class="num" id="LN36">36</td><td class="line"> fNSteps = 0;</td></tr>
116<tr><td class="num" id="LN37">37</td><td class="line"> fLowFreqColor.red = 0;</td></tr>
117<tr><td class="num" id="LN38">38</td><td class="line"> fLowFreqColor.blue = 255;</td></tr>
118<tr><td class="num" id="LN39">39</td><td class="line"> fLowFreqColor.green = 0;</td></tr>
119<tr><td class="num" id="LN40">40</td><td class="line"> </td></tr>
120<tr><td class="num" id="LN41">41</td><td class="line"> fHighFreqColor.red = 255;</td></tr>
121<tr><td class="num" id="LN42">42</td><td class="line"> fHighFreqColor.blue = 0;</td></tr>
122<tr><td class="num" id="LN43">43</td><td class="line"> fHighFreqColor.green = 0;</td></tr>
123<tr><td class="num" id="LN44">44</td><td class="line"> </td></tr>
124<tr><td class="num" id="LN45">45</td><td class="line"> fMinFrequencyLabel = <span class='string_literal'>"? MHz"</span>;</td></tr>
125<tr><td class="num" id="LN46">46</td><td class="line"> fMaxFrequencyLabel = <span class='string_literal'>"? MHz"</span>;</td></tr>
126<tr><td class="num" id="LN47">47</td><td class="line"> _InitView();</td></tr>
127<tr><td class="num" id="LN48">48</td><td class="line">}</td></tr>
128<tr><td class="num" id="LN49">49</td><td class="line"> </td></tr>
129<tr><td class="num" id="LN50">50</td><td class="line"> </td></tr>
130<tr><td class="num" id="LN51">51</td><td class="line">ColorStepView::~ColorStepView()</td></tr>
131<tr><td class="num" id="LN52">52</td><td class="line">{</td></tr>
132<tr><td class="num" id="LN53">53</td><td class="line"> <span class='keyword'>delete</span> fPerformanceList;</td></tr>
133<tr><td class="num" id="LN54">54</td><td class="line">}</td></tr>
134<tr><td class="num" id="LN55">55</td><td class="line"> </td></tr>
135<tr><td class="num" id="LN56">56</td><td class="line"> </td></tr>
136<tr><td class="num" id="LN57">57</td><td class="line"><span class='keyword'>void</span></td></tr>
137<tr><td class="num" id="LN58">58</td><td class="line">ColorStepView::AttachedToWindow()</td></tr>
138<tr><td class="num" id="LN59">59</td><td class="line">{</td></tr>
139<tr><td class="num" id="LN60">60</td><td class="line"> fSlider-&gt;SetTarget(<span class='keyword'>this</span>);</td></tr>
140<tr><td class="num" id="LN61">61</td><td class="line"> </td></tr>
141<tr><td class="num" id="LN62">62</td><td class="line"> <span class='keyword'>if</span> (!fOffScreenView) {</td></tr>
142<tr><td class="num" id="LN63">63</td><td class="line"> fOffScreenView = <span class='keyword'>new</span> BView(Bounds(), <span class='string_literal'>""</span>, <span class='macro'>B_FOLLOW_ALL<span class='expansion'>_rule_(_VIEW_TOP_, _VIEW_LEFT_, _VIEW_BOTTOM_, _VIEW_RIGHT_)</span></span>, B_WILL_DRAW);</td></tr>
143<tr><td class="num" id="LN64">64</td><td class="line"> }</td></tr>
144<tr><td class="num" id="LN65">65</td><td class="line"> <span class='keyword'>if</span> (!fOffScreenBitmap) {</td></tr>
145<tr><td class="num" id="LN66">66</td><td class="line"> fOffScreenBitmap = <span class='keyword'>new</span> BBitmap(Bounds(), B_CMAP8, <span class='keyword'>true</span>, <span class='keyword'>false</span>);</td></tr>
146<tr><td class="num" id="LN67">67</td><td class="line"> Window()-&gt;Lock();</td></tr>
147<tr><td class="num" id="LN68">68</td><td class="line"> <span class='keyword'>if</span> (fOffScreenBitmap &amp;&amp; fOffScreenView)</td></tr>
148<tr><td class="num" id="LN69">69</td><td class="line"> fOffScreenBitmap-&gt;AddChild(fOffScreenView);</td></tr>
149<tr><td class="num" id="LN70">70</td><td class="line"> Window()-&gt;Unlock();</td></tr>
150<tr><td class="num" id="LN71">71</td><td class="line"> }</td></tr>
151<tr><td class="num" id="LN72">72</td><td class="line">}</td></tr>
152<tr><td class="num" id="LN73">73</td><td class="line"> </td></tr>
153<tr><td class="num" id="LN74">74</td><td class="line"> </td></tr>
154<tr><td class="num" id="LN75">75</td><td class="line"><span class='keyword'>void</span></td></tr>
155<tr><td class="num" id="LN76">76</td><td class="line">ColorStepView::DetachedFromWindow()</td></tr>
156<tr><td class="num" id="LN77">77</td><td class="line">{</td></tr>
157<tr><td class="num" id="LN78">78</td><td class="line"> BView::DetachedFromWindow();</td></tr>
158<tr><td class="num" id="LN79">79</td><td class="line"> </td></tr>
159<tr><td class="num" id="LN80">80</td><td class="line"> <span class='keyword'>if</span> (fOffScreenBitmap) {</td></tr>
160<tr><td class="num" id="LN81">81</td><td class="line"> <span class='keyword'>delete</span> fOffScreenBitmap;</td></tr>
161<tr><td class="num" id="LN82">82</td><td class="line"> fOffScreenBitmap = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
162<tr><td class="num" id="LN83">83</td><td class="line"> fOffScreenView = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
163<tr><td class="num" id="LN84">84</td><td class="line"> }</td></tr>
164<tr><td class="num" id="LN85">85</td><td class="line">}</td></tr>
165<tr><td class="num" id="LN86">86</td><td class="line"> </td></tr>
166<tr><td class="num" id="LN87">87</td><td class="line"> </td></tr>
167<tr><td class="num" id="LN88">88</td><td class="line"><span class='keyword'>void</span></td></tr>
168<tr><td class="num" id="LN89">89</td><td class="line">ColorStepView::FrameResized(<span class='keyword'>float</span> w,<span class='keyword'>float</span> h)</td></tr>
169<tr><td class="num" id="LN90">90</td><td class="line">{</td></tr>
170<tr><td class="num" id="LN91">91</td><td class="line"> BView::FrameResized(w, h);</td></tr>
171<tr><td class="num" id="LN92">92</td><td class="line"> </td></tr>
172<tr><td class="num" id="LN93">93</td><td class="line"> BRect bounds(Bounds());</td></tr>
173<tr><td class="num" id="LN94">94</td><td class="line"> </td></tr>
174<tr><td class="num" id="LN95">95</td><td class="line"> <span class='keyword'>if</span> (bounds.right &lt;= 0.0f || bounds.bottom &lt;= 0.0f)</td></tr>
175<tr><td class="num" id="LN96">96</td><td class="line"> <span class='keyword'>return</span>;</td></tr>
176<tr><td class="num" id="LN97">97</td><td class="line"> </td></tr>
177<tr><td class="num" id="LN98">98</td><td class="line"> <span class='keyword'>if</span> (fOffScreenBitmap) {</td></tr>
178<tr><td class="num" id="LN99">99</td><td class="line"> fOffScreenBitmap-&gt;RemoveChild(fOffScreenView);</td></tr>
179<tr><td class="num" id="LN100">100</td><td class="line"> <span class='keyword'>delete</span> fOffScreenBitmap;</td></tr>
180<tr><td class="num" id="LN101">101</td><td class="line"> </td></tr>
181<tr><td class="num" id="LN102">102</td><td class="line"> fOffScreenView-&gt;ResizeTo(bounds.Width(), bounds.Height());</td></tr>
182<tr><td class="num" id="LN103">103</td><td class="line"> </td></tr>
183<tr><td class="num" id="LN104">104</td><td class="line"> fOffScreenBitmap = <span class='keyword'>new</span> BBitmap(Bounds(), B_RGBA32, <span class='keyword'>true</span>, <span class='keyword'>false</span>);</td></tr>
184<tr><td class="num" id="LN105">105</td><td class="line"> fOffScreenBitmap-&gt;AddChild(fOffScreenView);</td></tr>
185<tr><td class="num" id="LN106">106</td><td class="line"> }</td></tr>
186<tr><td class="num" id="LN107">107</td><td class="line"> </td></tr>
187<tr><td class="num" id="LN108">108</td><td class="line"> Invalidate();</td></tr>
188<tr><td class="num" id="LN109">109</td><td class="line">}</td></tr>
189<tr><td class="num" id="LN110">110</td><td class="line"> </td></tr>
190<tr><td class="num" id="LN111">111</td><td class="line"> </td></tr>
191<tr><td class="num" id="LN112">112</td><td class="line"><span class='keyword'>void</span></td></tr>
192<tr><td class="num" id="LN113">113</td><td class="line">ColorStepView::GetPreferredSize(<span class='keyword'>float</span> *width, <span class='keyword'>float</span> *height)</td></tr>
193<tr><td class="num" id="LN114">114</td><td class="line">{</td></tr>
194<tr><td class="num" id="LN115">115</td><td class="line"> *width = Frame().Width();</td></tr>
195<tr><td class="num" id="LN116">116</td><td class="line"> font_height fontHeight;</td></tr>
196<tr><td class="num" id="LN117">117</td><td class="line"> GetFontHeight(&amp;fontHeight);</td></tr>
197<tr><td class="num" id="LN118">118</td><td class="line"> </td></tr>
198<tr><td class="num" id="LN119">119</td><td class="line"> *height = fSlider-&gt;Frame().Height();</td></tr>
199<tr><td class="num" id="LN120">120</td><td class="line"> *height += kColorBarHeight;</td></tr>
200<tr><td class="num" id="LN121">121</td><td class="line"> *height += fontHeight.descent + fontHeight.ascent + 5;</td></tr>
201<tr><td class="num" id="LN122">122</td><td class="line">}</td></tr>
202<tr><td class="num" id="LN123">123</td><td class="line"> </td></tr>
203<tr><td class="num" id="LN124">124</td><td class="line"> </td></tr>
204<tr><td class="num" id="LN125">125</td><td class="line"><span class='keyword'>void</span></td></tr>
205<tr><td class="num" id="LN126">126</td><td class="line">ColorStepView::Draw(BRect updateRect)</td></tr>
206<tr><td class="num" id="LN127">127</td><td class="line">{</td></tr>
207<tr><td class="num" id="LN128">128</td><td class="line"> BView *view = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
208<tr><td class="num" id="LN129">129</td><td class="line"> <span class='keyword'>if</span>(fOffScreenView){</td></tr>
209<tr><td class="num" id="LN130">130</td><td class="line"> view = fOffScreenView;</td></tr>
210<tr><td class="num" id="LN131">131</td><td class="line"> }</td></tr>
211<tr><td class="num" id="LN132">132</td><td class="line"> <span class='keyword'>else</span>{</td></tr>
212<tr><td class="num" id="LN133">133</td><td class="line"> view = <span class='keyword'>this</span>;</td></tr>
213<tr><td class="num" id="LN134">134</td><td class="line"> }</td></tr>
214<tr><td class="num" id="LN135">135</td><td class="line"> </td></tr>
215<tr><td class="num" id="LN136">136</td><td class="line"> <span class='keyword'>if</span> (!fOffScreenBitmap || !fOffScreenBitmap-&gt;Lock())</td></tr>
216<tr><td class="num" id="LN137">137</td><td class="line"> <span class='keyword'>return</span>;</td></tr>
217<tr><td class="num" id="LN138">138</td><td class="line"> view-&gt;SetLowColor(ui_color(B_PANEL_BACKGROUND_COLOR));</td></tr>
218<tr><td class="num" id="LN139">139</td><td class="line"> </td></tr>
219<tr><td class="num" id="LN140">140</td><td class="line"> view-&gt;SetHighColor(ui_color(B_PANEL_BACKGROUND_COLOR));</td></tr>
220<tr><td class="num" id="LN141">141</td><td class="line"> view-&gt;FillRect(updateRect);</td></tr>
221<tr><td class="num" id="LN142">142</td><td class="line"> </td></tr>
222<tr><td class="num" id="LN143">143</td><td class="line"> BRect colorBarRect = fSlider-&gt;BarFrame();</td></tr>
223<tr><td class="num" id="LN144">144</td><td class="line"> colorBarRect.top = 0;</td></tr>
224<tr><td class="num" id="LN145">145</td><td class="line"> colorBarRect.bottom = kColorBarHeight;</td></tr>
225<tr><td class="num" id="LN146">146</td><td class="line"> colorBarRect.OffsetTo(colorBarRect.left, fSlider-&gt;Frame().bottom);</td></tr>
226<tr><td class="num" id="LN147">147</td><td class="line"> </td></tr>
227<tr><td class="num" id="LN148">148</td><td class="line"> <span class='keyword'>float</span> pos = 0.0;</td></tr>
228<tr><td class="num" id="LN149">149</td><td class="line"> <span class='keyword'>for</span> (<span class='keyword'>int</span> i = fPerformanceList-&gt;CountItems() - 1; i &gt;= 0 ; i--) {</td></tr>
229<tr><td class="num" id="LN150">150</td><td class="line"> performance_step* perfState = fPerformanceList-&gt;ItemAt(i);</td></tr>
230<tr><td class="num" id="LN151">151</td><td class="line"> </td></tr>
231<tr><td class="num" id="LN152">152</td><td class="line"> <span class='keyword'>float</span> nextPos = perfState-&gt;cpu_usage;</td></tr>
232<tr><td class="num" id="LN153">153</td><td class="line"> <span class='keyword'>float</span> width = colorBarRect.Width();</td></tr>
233<tr><td class="num" id="LN154">154</td><td class="line"> </td></tr>
234<tr><td class="num" id="LN155">155</td><td class="line"> BRect subRect(colorBarRect);</td></tr>
235<tr><td class="num" id="LN156">156</td><td class="line"> subRect.left += pos * width;</td></tr>
236<tr><td class="num" id="LN157">157</td><td class="line"> subRect.right = colorBarRect.left + nextPos * width;</td></tr>
237<tr><td class="num" id="LN158">158</td><td class="line"> </td></tr>
238<tr><td class="num" id="LN159">159</td><td class="line"> view-&gt;SetHighColor(perfState-&gt;color);</td></tr>
239<tr><td class="num" id="LN160">160</td><td class="line"> view-&gt;FillRect(subRect);</td></tr>
240<tr><td class="num" id="LN161">161</td><td class="line"> </td></tr>
241<tr><td class="num" id="LN162">162</td><td class="line"> pos = nextPos;</td></tr>
242<tr><td class="num" id="LN163">163</td><td class="line"> }</td></tr>
243<tr><td class="num" id="LN164">164</td><td class="line"> <span class='comment'>// draw label</span></td></tr>
244<tr><td class="num" id="LN165">165</td><td class="line"> <span class='keyword'>if</span> (IsEnabled()) {</td></tr>
245<tr><td class="num" id="LN166">166</td><td class="line"> view-&gt;SetHighColor(0, 0, 0);</td></tr>
246<tr><td class="num" id="LN167">167</td><td class="line"> } <span class='keyword'>else</span> {</td></tr>
247<tr><td class="num" id="LN168">168</td><td class="line"> view-&gt;SetHighColor(tint_color(LowColor(), B_DISABLED_LABEL_TINT));</td></tr>
248<tr><td class="num" id="LN169">169</td><td class="line"> }</td></tr>
249<tr><td class="num" id="LN170">170</td><td class="line"> </td></tr>
250<tr><td class="num" id="LN171">171</td><td class="line"> font_height fontHeight;</td></tr>
251<tr><td class="num" id="LN172">172</td><td class="line"> GetFontHeight(&amp;fontHeight);</td></tr>
252<tr><td class="num" id="LN173">173</td><td class="line"> <span class='keyword'>float</span> totalFontHeight = fontHeight.descent + fontHeight.ascent;</td></tr>
253<tr><td class="num" id="LN174">174</td><td class="line"> </td></tr>
254<tr><td class="num" id="LN175">175</td><td class="line"> view-&gt;DrawString(fMinFrequencyLabel.String(),</td></tr>
255<tr><td class="num" id="LN176">176</td><td class="line"> BPoint(0.0,</td></tr>
256<tr><td class="num" id="LN177">177</td><td class="line"> colorBarRect.bottom + totalFontHeight + 5));</td></tr>
257<tr><td class="num" id="LN178">178</td><td class="line"> </td></tr>
258<tr><td class="num" id="LN179">179</td><td class="line"> view-&gt;DrawString(fMaxFrequencyLabel.String(),</td></tr>
259<tr><td class="num" id="LN180">180</td><td class="line"> BPoint(Bounds().right</td></tr>
260<tr><td class="num" id="LN181">181</td><td class="line"> - StringWidth(fMaxFrequencyLabel.String()),</td></tr>
261<tr><td class="num" id="LN182">182</td><td class="line"> colorBarRect.bottom + totalFontHeight + 5));</td></tr>
262<tr><td class="num" id="LN183">183</td><td class="line"> </td></tr>
263<tr><td class="num" id="LN184">184</td><td class="line"> <span class='comment'>// blit bitmap</span></td></tr>
264<tr><td class="num" id="LN185">185</td><td class="line"> view-&gt;Sync();</td></tr>
265<tr><td class="num" id="LN186">186</td><td class="line"> fOffScreenBitmap-&gt;Unlock();</td></tr>
266<tr><td class="num" id="LN187">187</td><td class="line"> DrawBitmap(fOffScreenBitmap, B_ORIGIN);</td></tr>
267<tr><td class="num" id="LN188">188</td><td class="line"> </td></tr>
268<tr><td class="num" id="LN189">189</td><td class="line"> BView::Draw(updateRect);</td></tr>
269<tr><td class="num" id="LN190">190</td><td class="line">}</td></tr>
270<tr><td class="num" id="LN191">191</td><td class="line"> </td></tr>
271<tr><td class="num" id="LN192">192</td><td class="line"> </td></tr>
272<tr><td class="num" id="LN193">193</td><td class="line"><span class='keyword'>void</span></td></tr>
273<tr><td class="num" id="LN194">194</td><td class="line">ColorStepView::MessageReceived(BMessage *message)</td></tr>
274<tr><td class="num" id="LN195">195</td><td class="line">{</td></tr>
275<tr><td class="num" id="LN196">196</td><td class="line"> <span class='keyword'>switch</span> (message-&gt;what) {</td></tr>
276<tr><td class="num" id="LN197">197</td><td class="line"> <span class='keyword'>case</span> kMSGSliderChanged:</td></tr>
277<tr><td class="num" id="LN198">198</td><td class="line"> fSliderPosition = fSlider-&gt;Position();</td></tr>
278<tr><td class="num" id="LN199">199</td><td class="line"> _CalculatePerformanceSteps();</td></tr>
279<tr><td class="num" id="LN200">200</td><td class="line"> Invalidate();</td></tr>
280<tr><td class="num" id="LN201">201</td><td class="line"> <span class='keyword'>break</span>;</td></tr>
281<tr><td class="num" id="LN202">202</td><td class="line"> <span class='keyword'>case</span> kSteppingChanged:</td></tr>
282<tr><td class="num" id="LN203">203</td><td class="line"> Invoke();</td></tr>
283<tr><td class="num" id="LN204">204</td><td class="line"> <span class='keyword'>break</span>;</td></tr>
284<tr><td class="num" id="LN205">205</td><td class="line"> <span class='keyword'>default</span>:</td></tr>
285<tr><td class="num" id="LN206">206</td><td class="line"> BView::MessageReceived(message);</td></tr>
286<tr><td class="num" id="LN207">207</td><td class="line"> <span class='keyword'>break</span>;</td></tr>
287<tr><td class="num" id="LN208">208</td><td class="line"> }</td></tr>
288<tr><td class="num" id="LN209">209</td><td class="line">}</td></tr>
289<tr><td class="num" id="LN210">210</td><td class="line"> </td></tr>
290<tr><td class="num" id="LN211">211</td><td class="line"> </td></tr>
291<tr><td class="num" id="LN212">212</td><td class="line"><span class='keyword'>void</span></td></tr>
292<tr><td class="num" id="LN213">213</td><td class="line">ColorStepView::SetEnabled(<span class='keyword'>bool</span> enabled)</td></tr>
293<tr><td class="num" id="LN214">214</td><td class="line">{</td></tr>
294<tr><td class="num" id="LN215">215</td><td class="line"> fSlider-&gt;SetEnabled(enabled);</td></tr>
295<tr><td class="num" id="LN216">216</td><td class="line"> BControl::SetEnabled(enabled);</td></tr>
296<tr><td class="num" id="LN217">217</td><td class="line">}</td></tr>
297<tr><td class="num" id="LN218">218</td><td class="line"> </td></tr>
298<tr><td class="num" id="LN219">219</td><td class="line"> </td></tr>
299<tr><td class="num" id="LN220">220</td><td class="line"><span class='keyword'>void</span></td></tr>
300<tr><td class="num" id="LN221">221</td><td class="line">ColorStepView::SetFrequencys(StateList *list)</td></tr>
301<tr><td class="num" id="LN222">222</td><td class="line">{</td></tr>
302<tr><td class="num" id="LN223">223</td><td class="line"> fStateList = list;</td></tr>
303<tr><td class="num" id="LN224">224</td><td class="line"> fNSteps = fStateList-&gt;CountItems();</td></tr>
304<tr><td class="num" id="LN225">225</td><td class="line"> <span class='keyword'>if</span> (fNSteps &gt;= 2) {</td></tr>
305<tr><td class="num"></td><td class="line"><div id="Path1" class="msg msgControl" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">1</div></td><td>Taking false branch</td><td><div class="PathNav"><a href="#Path2" title="Next event (2)">&#x2192;</a></div></td></tr></table></div></td></tr>
306<tr><td class="num" id="LN226">226</td><td class="line"> <span class='keyword'>float</span> minFreq = fStateList-&gt;ItemAt(fNSteps - 1)-&gt;frequency;</td></tr>
307<tr><td class="num" id="LN227">227</td><td class="line"> <span class='keyword'>float</span> maxFreq = fStateList-&gt;ItemAt(0)-&gt;frequency;</td></tr>
308<tr><td class="num" id="LN228">228</td><td class="line"> fMinFrequencyLabel = CreateFrequencyString(minFreq);</td></tr>
309<tr><td class="num" id="LN229">229</td><td class="line"> fMaxFrequencyLabel = CreateFrequencyString(maxFreq);</td></tr>
310<tr><td class="num" id="LN230">230</td><td class="line"> }</td></tr>
311<tr><td class="num" id="LN231">231</td><td class="line"> </td></tr>
312<tr><td class="num" id="LN232">232</td><td class="line"> <span class='comment'>// fit size of fPerformanceList</span></td></tr>
313<tr><td class="num" id="LN233">233</td><td class="line"> int32 perfNumber = fPerformanceList-&gt;CountItems();</td></tr>
314<tr><td class="num" id="LN234">234</td><td class="line"> <span class='keyword'>if</span> (perfNumber &lt; fNSteps) {</td></tr>
315<tr><td class="num"></td><td class="line"><div id="Path2" class="msg msgControl" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">2</div></td><td><div class="PathNav"><a href="#Path1" title="Previous event (1)">&#x2190;</a></div></td></td><td>Taking false branch</td><td><div class="PathNav"><a href="#Path3" title="Next event (3)">&#x2192;</a></div></td></tr></table></div></td></tr>
316<tr><td class="num" id="LN235">235</td><td class="line"> <span class='keyword'>for</span> (<span class='keyword'>int</span> i = 0; i &lt; fNSteps - perfNumber; i++)</td></tr>
317<tr><td class="num" id="LN236">236</td><td class="line"> fPerformanceList-&gt;AddItem(<span class='keyword'>new</span> performance_step);</td></tr>
318<tr><td class="num" id="LN237">237</td><td class="line"> }</td></tr>
319<tr><td class="num" id="LN238">238</td><td class="line"> <span class='keyword'>else</span> {</td></tr>
320<tr><td class="num" id="LN239">239</td><td class="line"> <span class='keyword'>for</span> (<span class='keyword'>int</span> i = 0; i &lt; perfNumber - fNSteps; i++)</td></tr>
321<tr><td class="num"></td><td class="line"><div id="Path3" class="msg msgControl" style="margin-left:17ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">3</div></td><td><div class="PathNav"><a href="#Path2" title="Previous event (2)">&#x2190;</a></div></td></td><td>Loop condition is false. Execution continues on line 243</td><td><div class="PathNav"><a href="#Path4" title="Next event (4)">&#x2192;</a></div></td></tr></table></div></td></tr>
322<tr><td class="num" id="LN240">240</td><td class="line"> fPerformanceList-&gt;RemoveItemAt(0);</td></tr>
323<tr><td class="num" id="LN241">241</td><td class="line"> }</td></tr>
324<tr><td class="num" id="LN242">242</td><td class="line"> <span class='comment'>// and fill the list</span></td></tr>
325<tr><td class="num" id="LN243">243</td><td class="line"> <span class="mrange">_CalculatePerformanceSteps()</span>;</td></tr>
326<tr><td class="num"></td><td class="line"><div id="Path4" class="msg msgEvent" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexEvent">4</div></td><td><div class="PathNav"><a href="#Path3" title="Previous event (3)">&#x2190;</a></div></td></td><td>Calling 'ColorStepView::_CalculatePerformanceSteps'</td><td><div class="PathNav"><a href="#Path5" title="Next event (5)">&#x2192;</a></div></td></tr></table></div></td></tr>
327<tr><td class="num" id="LN244">244</td><td class="line"> </td></tr>
328<tr><td class="num" id="LN245">245</td><td class="line">}</td></tr>
329<tr><td class="num" id="LN246">246</td><td class="line"> </td></tr>
330<tr><td class="num" id="LN247">247</td><td class="line"> </td></tr>
331<tr><td class="num" id="LN248">248</td><td class="line">PerformanceList*</td></tr>
332<tr><td class="num" id="LN249">249</td><td class="line">ColorStepView::GetPerformanceSteps()</td></tr>
333<tr><td class="num" id="LN250">250</td><td class="line">{</td></tr>
334<tr><td class="num" id="LN251">251</td><td class="line"> <span class='keyword'>return</span> fPerformanceList;</td></tr>
335<tr><td class="num" id="LN252">252</td><td class="line">}</td></tr>
336<tr><td class="num" id="LN253">253</td><td class="line"> </td></tr>
337<tr><td class="num" id="LN254">254</td><td class="line"> </td></tr>
338<tr><td class="num" id="LN255">255</td><td class="line">BString</td></tr>
339<tr><td class="num" id="LN256">256</td><td class="line">ColorStepView::CreateFrequencyString(uint16 frequency)</td></tr>
340<tr><td class="num" id="LN257">257</td><td class="line">{</td></tr>
341<tr><td class="num" id="LN258">258</td><td class="line"> BString string = <span class='string_literal'>""</span>;</td></tr>
342<tr><td class="num" id="LN259">259</td><td class="line"> <span class='keyword'>if</span> (frequency &gt;= 1000) {</td></tr>
343<tr><td class="num" id="LN260">260</td><td class="line"> <span class='keyword'>char</span> buffer [10];</td></tr>
344<tr><td class="num" id="LN261">261</td><td class="line"> sprintf (buffer, <span class='string_literal'>"%.1f"</span>, <span class='keyword'>float</span>(frequency) / 1000);</td></tr>
345<tr><td class="num" id="LN262">262</td><td class="line"> string &lt;&lt; buffer;</td></tr>
346<tr><td class="num" id="LN263">263</td><td class="line"> string += <span class='string_literal'>" GHz"</span>;</td></tr>
347<tr><td class="num" id="LN264">264</td><td class="line"> }</td></tr>
348<tr><td class="num" id="LN265">265</td><td class="line"> <span class='keyword'>else</span> {</td></tr>
349<tr><td class="num" id="LN266">266</td><td class="line"> string &lt;&lt; frequency;</td></tr>
350<tr><td class="num" id="LN267">267</td><td class="line"> string += <span class='string_literal'>" MHz"</span>;</td></tr>
351<tr><td class="num" id="LN268">268</td><td class="line"> }</td></tr>
352<tr><td class="num" id="LN269">269</td><td class="line"> <span class='keyword'>return</span> string;</td></tr>
353<tr><td class="num" id="LN270">270</td><td class="line">}</td></tr>
354<tr><td class="num" id="LN271">271</td><td class="line"> </td></tr>
355<tr><td class="num" id="LN272">272</td><td class="line"> </td></tr>
356<tr><td class="num" id="LN273">273</td><td class="line"> </td></tr>
357<tr><td class="num" id="LN274">274</td><td class="line"><span class='keyword'>float</span></td></tr>
358<tr><td class="num" id="LN275">275</td><td class="line">ColorStepView::UsageOfStep(int32 step, int32 nSteps, <span class='keyword'>float</span> base)</td></tr>
359<tr><td class="num" id="LN276">276</td><td class="line">{</td></tr>
360<tr><td class="num" id="LN277">277</td><td class="line"> <span class='keyword'>float</span> singleWidth = (1 - base) / (nSteps - 1);</td></tr>
361<tr><td class="num" id="LN278">278</td><td class="line"> <span class='keyword'>return</span> base + singleWidth * step;</td></tr>
362<tr><td class="num" id="LN279">279</td><td class="line">}</td></tr>
363<tr><td class="num" id="LN280">280</td><td class="line"> </td></tr>
364<tr><td class="num" id="LN281">281</td><td class="line"> </td></tr>
365<tr><td class="num" id="LN282">282</td><td class="line"><span class='keyword'>void</span></td></tr>
366<tr><td class="num" id="LN283">283</td><td class="line">ColorStepView::_InitView()</td></tr>
367<tr><td class="num" id="LN284">284</td><td class="line">{</td></tr>
368<tr><td class="num" id="LN285">285</td><td class="line"> SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));</td></tr>
369<tr><td class="num" id="LN286">286</td><td class="line"> </td></tr>
370<tr><td class="num" id="LN287">287</td><td class="line"> BRect sliderFrame(Bounds());</td></tr>
371<tr><td class="num" id="LN288">288</td><td class="line"> </td></tr>
372<tr><td class="num" id="LN289">289</td><td class="line"> fSlider = <span class='keyword'>new</span> BSlider(sliderFrame, <span class='string_literal'>"StepSlider"</span>,</td></tr>
373<tr><td class="num" id="LN290">290</td><td class="line"> <span class='macro'>B_TRANSLATE(<span class='string_literal'>"Step up by CPU usage"</span>)<span class='expansion'>BLocaleRoster::Default()-&gt;GetCatalog()-&gt;GetString(("Step up by CPU usage"<br>), "Color Step View")</span></span>,</td></tr>
374<tr><td class="num" id="LN291">291</td><td class="line"> <span class='keyword'>new</span> BMessage(kSteppingChanged), 0, 100);</td></tr>
375<tr><td class="num" id="LN292">292</td><td class="line"> fSlider-&gt;SetModificationMessage(<span class='keyword'>new</span> BMessage(kMSGSliderChanged));</td></tr>
376<tr><td class="num" id="LN293">293</td><td class="line"> </td></tr>
377<tr><td class="num" id="LN294">294</td><td class="line"> fSliderPosition = 0.25 - fNSteps * 0.05;</td></tr>
378<tr><td class="num" id="LN295">295</td><td class="line"> fSlider-&gt;SetPosition(fSliderPosition);</td></tr>
379<tr><td class="num" id="LN296">296</td><td class="line"> fSlider-&gt;SetLimitLabels(<span class='string_literal'>"0%"</span>, <span class='string_literal'>"100%"</span>);</td></tr>
380<tr><td class="num" id="LN297">297</td><td class="line"> fSlider-&gt;SetHashMarks(B_HASH_MARKS_BOTTOM);</td></tr>
381<tr><td class="num" id="LN298">298</td><td class="line"> fSlider-&gt;SetHashMarkCount(5);</td></tr>
382<tr><td class="num" id="LN299">299</td><td class="line"> AddChild(fSlider);</td></tr>
383<tr><td class="num" id="LN300">300</td><td class="line">}</td></tr>
384<tr><td class="num" id="LN301">301</td><td class="line"> </td></tr>
385<tr><td class="num" id="LN302">302</td><td class="line"> </td></tr>
386<tr><td class="num" id="LN303">303</td><td class="line"><span class='keyword'>void</span></td></tr>
387<tr><td class="num" id="LN304">304</td><td class="line">ColorStepView::_CalculatePerformanceSteps()</td></tr>
388<tr><td class="num" id="LN305">305</td><td class="line">{</td></tr>
389<tr><td class="num" id="LN306">306</td><td class="line"> <span class='keyword'>for</span> (<span class='keyword'>int</span> i = 0; i &lt; fNSteps; i++) {</td></tr>
390<tr><td class="num"></td><td class="line"><div id="Path5" class="msg msgControl" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">5</div></td><td><div class="PathNav"><a href="#Path4" title="Previous event (4)">&#x2190;</a></div></td></td><td>Loop condition is true. Entering loop body</td><td><div class="PathNav"><a href="#Path6" title="Next event (6)">&#x2192;</a></div></td></tr></table></div></td></tr>
391<tr><td class="num" id="LN307">307</td><td class="line"> <span class='comment'>// begin with the lowest frequency</span></td></tr>
392<tr><td class="num" id="LN308">308</td><td class="line"> performance_step* perfState = fPerformanceList-&gt;ItemAt(fNSteps -1 - i);</td></tr>
393<tr><td class="num" id="LN309">309</td><td class="line"> perfState-&gt;cpu_usage = _PositonStep(i);</td></tr>
394<tr><td class="num" id="LN310">310</td><td class="line"> <span class="mrange">_ColorStep(i, perfState-&gt;color)</span>;</td></tr>
395<tr><td class="num"></td><td class="line"><div id="Path6" class="msg msgEvent" style="margin-left:17ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexEvent">6</div></td><td><div class="PathNav"><a href="#Path5" title="Previous event (5)">&#x2190;</a></div></td></td><td>Calling 'ColorStepView::_ColorStep'</td><td><div class="PathNav"><a href="#EndPath" title="Next event (7)">&#x2192;</a></div></td></tr></table></div></td></tr>
396<tr><td class="num" id="LN311">311</td><td class="line"> }</td></tr>
397<tr><td class="num" id="LN312">312</td><td class="line">}</td></tr>
398<tr><td class="num" id="LN313">313</td><td class="line"> </td></tr>
399<tr><td class="num" id="LN314">314</td><td class="line"> </td></tr>
400<tr><td class="num" id="LN315">315</td><td class="line"><span class='keyword'>float</span></td></tr>
401<tr><td class="num" id="LN316">316</td><td class="line">ColorStepView::_PositonStep(int32 step)</td></tr>
402<tr><td class="num" id="LN317">317</td><td class="line">{</td></tr>
403<tr><td class="num" id="LN318">318</td><td class="line"> <span class='keyword'>if</span> (step &gt;= fNSteps)</td></tr>
404<tr><td class="num" id="LN319">319</td><td class="line"> <span class='keyword'>return</span> 1.0;</td></tr>
405<tr><td class="num" id="LN320">320</td><td class="line"> </td></tr>
406<tr><td class="num" id="LN321">321</td><td class="line"> <span class='keyword'>return</span> UsageOfStep(step, fNSteps, fSliderPosition);</td></tr>
407<tr><td class="num" id="LN322">322</td><td class="line">}</td></tr>
408<tr><td class="num" id="LN323">323</td><td class="line"> </td></tr>
409<tr><td class="num" id="LN324">324</td><td class="line"> </td></tr>
410<tr><td class="num" id="LN325">325</td><td class="line"><span class='keyword'>void</span></td></tr>
411<tr><td class="num" id="LN326">326</td><td class="line">ColorStepView::_ColorStep(int32 step, rgb_color &amp;color)</td></tr>
412<tr><td class="num" id="LN327">327</td><td class="line">{</td></tr>
413<tr><td class="num" id="LN328">328</td><td class="line"> color.red = fLowFreqColor.red</td></tr>
414<tr><td class="num" id="LN329">329</td><td class="line"> + <span class="mrange">(fHighFreqColor.red - fLowFreqColor.red)</td></tr></span>
415<tr><td class="num" id="LN330">330</td><td class="line"> <span class="mrange">/ (fNSteps - 1)</span> * step;</td></tr>
416<tr><td class="num"></td><td class="line"><div id="EndPath" class="msg msgEvent" style="margin-left:49ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexEvent">7</div></td><td><div class="PathNav"><a href="#Path6" title="Previous event (6)">&#x2190;</a></div></td></td><td>Division by zero</td></tr></table></div></td></tr>
417<tr><td class="num" id="LN331">331</td><td class="line"> color.green = fLowFreqColor.green</td></tr>
418<tr><td class="num" id="LN332">332</td><td class="line"> + (fHighFreqColor.green - fLowFreqColor.green)</td></tr>
419<tr><td class="num" id="LN333">333</td><td class="line"> / (fNSteps - 1) * step;</td></tr>
420<tr><td class="num" id="LN334">334</td><td class="line"> color.blue = fLowFreqColor.blue</td></tr>
421<tr><td class="num" id="LN335">335</td><td class="line"> + (fHighFreqColor.blue - fLowFreqColor.blue)</td></tr>
422<tr><td class="num" id="LN336">336</td><td class="line"> / (fNSteps - 1) * step;</td></tr>
423<tr><td class="num" id="LN337">337</td><td class="line">}</td></tr>
424<tr><td class="num" id="LN338">338</td><td class="line"> </td></tr>
425</table></body></html>