zoom-region_8c-source.html

在Linux下实现magnification功能

<a name="l00370"></a>00370                         a-&gt;y -= b-&gt;height;
<a name="l00371"></a>00371                         a-&gt;height += b-&gt;height;
<a name="l00372"></a>00372                         b-&gt;width -= a-&gt;width;
<a name="l00373"></a>00373                         refactored = TRUE;
<a name="l00374"></a>00374                 }
<a name="l00375"></a>00375                 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (a-&gt;y + a-&gt;height == b-&gt;y)
<a name="l00376"></a>00376                 {
<a name="l00377"></a>00377                         a-&gt;height += b-&gt;height;
<a name="l00378"></a>00378                         b-&gt;width -= a-&gt;width;
<a name="l00379"></a>00379                         refactored = TRUE;
<a name="l00380"></a>00380                 }
<a name="l00381"></a>00381                 <span class="keywordflow">if</span> (refactored) fprintf (stderr, <span class="stringliteral">"REFACTOR 3\n"</span>);
<a name="l00382"></a>00382         }
<a name="l00383"></a>00383         <span class="keywordflow">else</span> <span class="keywordflow">if</span> (p-&gt;y + p-&gt;height == n-&gt;y + n-&gt;height)
<a name="l00384"></a>00384         {
<a name="l00385"></a>00385                 <span class="keywordflow">if</span> (p-&gt;height &lt; n-&gt;height)
<a name="l00386"></a>00386                 {
<a name="l00387"></a>00387                         a = p;
<a name="l00388"></a>00388                         b = n;
<a name="l00389"></a>00389                 }
<a name="l00390"></a>00390                 <span class="keywordflow">else</span>
<a name="l00391"></a>00391                 {
<a name="l00392"></a>00392                         a = n;
<a name="l00393"></a>00393                         b = p;
<a name="l00394"></a>00394                 }
<a name="l00395"></a>00395                 <span class="keywordflow">if</span> (a-&gt;x == b-&gt;x + b-&gt;width)
<a name="l00396"></a>00396                 {
<a name="l00397"></a>00397                         a-&gt;x -= b-&gt;width;
<a name="l00398"></a>00398                         a-&gt;width += b-&gt;width;
<a name="l00399"></a>00399                         b-&gt;height -= a-&gt;height;
<a name="l00400"></a>00400                         refactored = TRUE;
<a name="l00401"></a>00401                 }
<a name="l00402"></a>00402                 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (a-&gt;x + a-&gt;width == b-&gt;x)
<a name="l00403"></a>00403                 {
<a name="l00404"></a>00404                         a-&gt;width += b-&gt;width;
<a name="l00405"></a>00405                         b-&gt;height -= a-&gt;height;
<a name="l00406"></a>00406                         refactored = TRUE;
<a name="l00407"></a>00407                 }
<a name="l00408"></a>00408                 <span class="keywordflow">if</span> (refactored) fprintf (stderr, <span class="stringliteral">"REFACTOR 4\n"</span>);
<a name="l00409"></a>00409         }
<a name="l00410"></a>00410         <span class="keywordflow">return</span> refactored;
<a name="l00411"></a>00411 }
<a name="l00412"></a>00412 
<a name="l00413"></a>00413 <span class="keyword">static</span> GList*
<a name="l00414"></a>00414 _combine_update_rects (GList *q, <span class="keywordtype">int</span> lookahead_n)
<a name="l00415"></a>00415 {
<a name="l00416"></a>00416         <span class="keywordtype">int</span> i = 0;
<a name="l00417"></a>00417         GdkRectangle *a = q-&gt;data;
<a name="l00418"></a>00418         GList *p = q;
<a name="l00419"></a>00419         <span class="keywordflow">while</span> (i &lt; lookahead_n &amp;&amp; p &amp;&amp; p-&gt;next)
<a name="l00420"></a>00420         {
<a name="l00421"></a>00421                 <span class="keywordflow">if</span> (_combine_rects (a, q-&gt;next-&gt;data))
<a name="l00422"></a>00422                 {
<a name="l00423"></a>00423                         q = g_list_delete_link (q, p-&gt;next);
<a name="l00424"></a>00424                 }
<a name="l00425"></a>00425                 <span class="keywordflow">else</span>
<a name="l00426"></a>00426                 {
<a name="l00427"></a>00427                         p = p-&gt;next;
<a name="l00428"></a>00428                         ++i;
<a name="l00429"></a>00429                 }
<a name="l00430"></a>00430         }
<a name="l00431"></a>00431         <span class="keywordflow">return</span> q;
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433 <span class="preprocessor">#endif</span>
<a name="l00434"></a>00434 <span class="preprocessor"></span>
<a name="l00435"></a>00435 <span class="comment">/*#define _is_horizontal_rect(r)   (((2 * (r)-&gt;width / 3 * (r)-&gt;height)) &gt; 1)*/</span>
<a name="l00436"></a>00436 <span class="comment">/*#define _is_vertical_rect(r)   (((2 * (r)-&gt;height / 3 * (r)-&gt;width)) &gt; 1)*/</span>
<a name="l00437"></a><a class="code" href="zoom-region_8c.html#b02a62fa52940b730c53a67c5a98e81b">00437</a> <span class="preprocessor">#define _is_horizontal_rect(r) ((r)-&gt;width &gt; (r)-&gt;height) </span>
<a name="l00438"></a><a class="code" href="zoom-region_8c.html#1b059d60095c1d945ce8352da4f7b4ed">00438</a> <span class="preprocessor"></span><span class="preprocessor">#define _is_vertical_rect(r)   ((r)-&gt;height &gt; (r)-&gt;width)</span>
<a name="l00439"></a>00439 <span class="preprocessor"></span>
<a name="l00446"></a>00446 <span class="keyword">static</span> GList *
<a name="l00447"></a><a class="code" href="zoom-region_8c.html#bb118768b870206f7d3adce92cfb89c7">00447</a> <a class="code" href="zoom-region_8c.html#bb118768b870206f7d3adce92cfb89c7">_coalesce_update_rects</a> (GList *q, <span class="keywordtype">int</span> min_coalesce_length)
<a name="l00448"></a>00448 {
<a name="l00449"></a>00449         GdkRectangle *v = NULL, *h = NULL;
<a name="l00450"></a>00450         GList *compact_queue = NULL;
<a name="l00451"></a>00451 <span class="comment">/*      fprintf (stderr, "starting queue length = %d\n", g_list_length (q)); */</span>
<a name="l00452"></a>00452         <span class="keywordflow">if</span> (g_list_length (q) &lt; min_coalesce_length) 
<a name="l00453"></a>00453                 <span class="keywordflow">return</span> g_list_copy (q);
<a name="l00454"></a>00454         <span class="keywordflow">while</span> (q)
<a name="l00455"></a>00455         {
<a name="l00456"></a>00456                 <span class="keywordflow">if</span> (<a class="code" href="zoom-region_8c.html#1b059d60095c1d945ce8352da4f7b4ed">_is_vertical_rect</a> ((GdkRectangle *) (q-&gt;data)))
<a name="l00457"></a>00457                 {
<a name="l00458"></a>00458                         <span class="keywordflow">if</span> (v) gdk_rectangle_union (v, q-&gt;data, v);
<a name="l00459"></a>00459                         <span class="keywordflow">else</span>
<a name="l00460"></a>00460                         {
<a name="l00461"></a>00461                                 v = g_new0 (GdkRectangle, 1);
<a name="l00462"></a>00462                                 *v = *(GdkRectangle *)q-&gt;data;
<a name="l00463"></a>00463                         }
<a name="l00464"></a>00464                 }
<a name="l00465"></a>00465                 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="zoom-region_8c.html#b02a62fa52940b730c53a67c5a98e81b">_is_horizontal_rect</a> ((GdkRectangle *) (q-&gt;data)))
<a name="l00466"></a>00466                 {
<a name="l00467"></a>00467                         <span class="keywordflow">if</span> (h) gdk_rectangle_union (h, q-&gt;data, h);
<a name="l00468"></a>00468                         <span class="keywordflow">else</span>
<a name="l00469"></a>00469                         {
<a name="l00470"></a>00470                                 h = g_new0 (GdkRectangle, 1);
<a name="l00471"></a>00471                                 *h = *(GdkRectangle *)q-&gt;data;
<a name="l00472"></a>00472                         }
<a name="l00473"></a>00473                 }
<a name="l00474"></a>00474                 <span class="keywordflow">else</span>
<a name="l00475"></a>00475                         compact_queue = g_list_prepend (compact_queue, q-&gt;data);
<a name="l00476"></a>00476                 q = q-&gt;next;
<a name="l00477"></a>00477         };
<a name="l00478"></a>00478         <span class="keywordflow">if</span> (v)
<a name="l00479"></a>00479                 compact_queue = g_list_prepend (compact_queue, v);
<a name="l00480"></a>00480         <span class="keywordflow">if</span> (h)
<a name="l00481"></a>00481                 compact_queue = g_list_prepend (compact_queue, h);
<a name="l00482"></a>00482 <span class="comment">/*      fprintf (stderr, "ending queue length = %d\n", g_list_length (compact_queue));*/</span>
<a name="l00483"></a>00483         <span class="comment">/* don't free the original queue, that's the caller's responsibility */</span>
<a name="l00484"></a>00484         <span class="keywordflow">return</span> compact_queue;
<a name="l00485"></a>00485 }
<a name="l00486"></a>00486 
<a name="l00487"></a>00487 <span class="preprocessor">#ifdef BROKEN_COALESCE_STUFF_GETS_FIXED</span>
<a name="l00488"></a>00488 <span class="preprocessor"></span><span class="keyword">static</span> GList *
<a name="l00489"></a>00489 _smartbutbroken_coalesce_update_rects (GList *q, <span class="keywordtype">int</span> lookahead_n)
<a name="l00490"></a>00490 {
<a name="l00491"></a>00491         <span class="keywordtype">int</span> i = 0, len;
<a name="l00492"></a>00492         fprintf (stderr, <span class="stringliteral">"starting queue length = %d\n"</span>, g_list_length (q));
<a name="l00493"></a>00493         <span class="keywordflow">do</span> {
<a name="l00494"></a>00494                 GdkRectangle *a;
<a name="l00495"></a>00495                 len = g_list_length (q);
<a name="l00496"></a>00496                 q = _combine_update_rects (q, lookahead_n);
<a name="l00497"></a>00497                 a = q-&gt;data;