nuklear__list__view_8c_source.html 19 KB

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  36. <div id="projectbrief">This is a minimal-state, immediate-mode graphical user interface toolkit written in ANSI C and licensed under public domain. It was designed as a simple embeddable user interface for application and does not have any dependencies, a default render backend or OS window/input handling but instead provides a highly modular, library-based approach, with simple input state for input and draw commands describing primitive shapes as output. So instead of providing a layered library that tries to abstract over a number of platform and render backends, it focuses only on the actual UI.</div>
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  98. <div class="headertitle"><div class="title">nuklear_list_view.c</div></div>
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  100. <div class="contents">
  101. <div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#include &quot;<a class="code" href="nuklear_8h.html">nuklear.h</a>&quot;</span></div>
  102. <div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#include &quot;nuklear_internal.h&quot;</span></div>
  103. <div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span> </div>
  104. <div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">/* ===============================================================</span></div>
  105. <div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> *</span></div>
  106. <div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> * LIST VIEW</span></div>
  107. <div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> *</span></div>
  108. <div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> * ===============================================================*/</span></div>
  109. <div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span>NK_API nk_bool</div>
  110. <div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span>nk_list_view_begin(<span class="keyword">struct</span> <a class="code hl_struct" href="structnk__context.html">nk_context</a> *ctx, <span class="keyword">struct</span> <a class="code hl_struct" href="structnk__list__view.html">nk_list_view</a> *view,</div>
  111. <div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *title, nk_flags flags, <span class="keywordtype">int</span> row_height, <span class="keywordtype">int</span> row_count)</div>
  112. <div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span>{</div>
  113. <div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <span class="keywordtype">int</span> title_len;</div>
  114. <div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> nk_hash title_hash;</div>
  115. <div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> nk_uint *x_offset;</div>
  116. <div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> nk_uint *y_offset;</div>
  117. <div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
  118. <div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keywordtype">int</span> result;</div>
  119. <div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__window.html">nk_window</a> *win;</div>
  120. <div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__panel.html">nk_panel</a> *layout;</div>
  121. <div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">const</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__style.html">nk_style</a> *style;</div>
  122. <div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__vec2.html">nk_vec2</a> item_spacing;</div>
  123. <div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
  124. <div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> NK_ASSERT(ctx);</div>
  125. <div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> NK_ASSERT(view);</div>
  126. <div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> NK_ASSERT(title);</div>
  127. <div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordflow">if</span> (!ctx || !view || !title) <span class="keywordflow">return</span> 0;</div>
  128. <div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
  129. <div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> win = ctx-&gt;current;</div>
  130. <div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> style = &amp;ctx-&gt;style;</div>
  131. <div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> item_spacing = style-&gt;window.spacing;</div>
  132. <div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> row_height += NK_MAX(0, (<span class="keywordtype">int</span>)item_spacing.y);</div>
  133. <div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
  134. <div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="comment">/* find persistent list view scrollbar offset */</span></div>
  135. <div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> title_len = (int)nk_strlen(title);</div>
  136. <div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> title_hash = nk_murmur_hash(title, (<span class="keywordtype">int</span>)title_len, NK_PANEL_GROUP);</div>
  137. <div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> x_offset = nk_find_value(win, title_hash);</div>
  138. <div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">if</span> (!x_offset) {</div>
  139. <div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> x_offset = nk_add_value(ctx, win, title_hash, 0);</div>
  140. <div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> y_offset = nk_add_value(ctx, win, title_hash+1, 0);</div>
  141. <div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
  142. <div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> NK_ASSERT(x_offset);</div>
  143. <div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> NK_ASSERT(y_offset);</div>
  144. <div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">if</span> (!x_offset || !y_offset) <span class="keywordflow">return</span> 0;</div>
  145. <div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> *x_offset = *y_offset = 0;</div>
  146. <div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> } <span class="keywordflow">else</span> y_offset = nk_find_value(win, title_hash+1);</div>
  147. <div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> view-&gt;scroll_value = *y_offset;</div>
  148. <div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> view-&gt;scroll_pointer = y_offset;</div>
  149. <div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> </div>
  150. <div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> *y_offset = 0;</div>
  151. <div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> result = <a class="code hl_function" href="nuklear_8h.html#a6adb72deb66e2714d654c8d57bd277b5">nk_group_scrolled_offset_begin</a>(ctx, x_offset, y_offset, title, flags);</div>
  152. <div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> win = ctx-&gt;current;</div>
  153. <div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> layout = win-&gt;layout;</div>
  154. <div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
  155. <div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> view-&gt;total_height = row_height * NK_MAX(row_count,1);</div>
  156. <div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> view-&gt;begin = (int)NK_MAX(((<span class="keywordtype">float</span>)view-&gt;scroll_value / (<span class="keywordtype">float</span>)row_height), 0.0f);</div>
  157. <div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> view-&gt;count = (int)NK_MAX(nk_iceilf((layout-&gt;clip.h)/(float)row_height),0);</div>
  158. <div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> view-&gt;count = NK_MIN(view-&gt;count, row_count - view-&gt;begin);</div>
  159. <div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> view-&gt;end = view-&gt;begin + view-&gt;count;</div>
  160. <div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> view-&gt;ctx = ctx;</div>
  161. <div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">return</span> result;</div>
  162. <div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span>}</div>
  163. <div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span>NK_API <span class="keywordtype">void</span></div>
  164. <div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span>nk_list_view_end(<span class="keyword">struct</span> <a class="code hl_struct" href="structnk__list__view.html">nk_list_view</a> *view)</div>
  165. <div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span>{</div>
  166. <div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__context.html">nk_context</a> *ctx;</div>
  167. <div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__window.html">nk_window</a> *win;</div>
  168. <div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">struct </span><a class="code hl_struct" href="structnk__panel.html">nk_panel</a> *layout;</div>
  169. <div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
  170. <div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> NK_ASSERT(view);</div>
  171. <div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> NK_ASSERT(view-&gt;ctx);</div>
  172. <div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> NK_ASSERT(view-&gt;scroll_pointer);</div>
  173. <div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">if</span> (!view || !view-&gt;ctx) <span class="keywordflow">return</span>;</div>
  174. <div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> </div>
  175. <div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> ctx = view-&gt;ctx;</div>
  176. <div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> win = ctx-&gt;current;</div>
  177. <div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> layout = win-&gt;layout;</div>
  178. <div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> layout-&gt;at_y = layout-&gt;bounds.y + (float)view-&gt;total_height;</div>
  179. <div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> *view-&gt;scroll_pointer = *view-&gt;scroll_pointer + view-&gt;scroll_value;</div>
  180. <div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <a class="code hl_function" href="nuklear_8h.html#ae0e5210696cae430a9e9b79e1f76cee5">nk_group_end</a>(view-&gt;ctx);</div>
  181. <div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span>}</div>
  182. <div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> </div>
  183. <div class="ttc" id="anuklear_8h_html"><div class="ttname"><a href="nuklear_8h.html">nuklear.h</a></div><div class="ttdoc">main API and documentation file</div></div>
  184. <div class="ttc" id="anuklear_8h_html_a6adb72deb66e2714d654c8d57bd277b5"><div class="ttname"><a href="nuklear_8h.html#a6adb72deb66e2714d654c8d57bd277b5">nk_group_scrolled_offset_begin</a></div><div class="ttdeci">NK_API nk_bool nk_group_scrolled_offset_begin(struct nk_context *, nk_uint *x_offset, nk_uint *y_offset, const char *title, nk_flags flags)</div><div class="ttdef"><b>Definition</b> <a href="nuklear__group_8c_source.html#l00010">nuklear_group.c:10</a></div></div>
  185. <div class="ttc" id="anuklear_8h_html_ae0e5210696cae430a9e9b79e1f76cee5"><div class="ttname"><a href="nuklear_8h.html#ae0e5210696cae430a9e9b79e1f76cee5">nk_group_end</a></div><div class="ttdeci">NK_API void nk_group_end(struct nk_context *)</div><div class="ttdef"><b>Definition</b> <a href="nuklear__group_8c_source.html#l00165">nuklear_group.c:165</a></div></div>
  186. <div class="ttc" id="astructnk__context_html"><div class="ttname"><a href="structnk__context.html">nk_context</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l05705">nuklear.h:5705</a></div></div>
  187. <div class="ttc" id="astructnk__list__view_html"><div class="ttname"><a href="structnk__list__view.html">nk_list_view</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l03065">nuklear.h:3065</a></div></div>
  188. <div class="ttc" id="astructnk__panel_html"><div class="ttname"><a href="structnk__panel.html">nk_panel</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l05463">nuklear.h:5463</a></div></div>
  189. <div class="ttc" id="astructnk__style_html"><div class="ttname"><a href="structnk__style.html">nk_style</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l05347">nuklear.h:5347</a></div></div>
  190. <div class="ttc" id="astructnk__vec2_html"><div class="ttname"><a href="structnk__vec2.html">nk_vec2</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l00263">nuklear.h:263</a></div></div>
  191. <div class="ttc" id="astructnk__window_html"><div class="ttname"><a href="structnk__window.html">nk_window</a></div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l05539">nuklear.h:5539</a></div></div>
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