New upstream version 3.23.2
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Andrea Azzarone
@ -3,12 +3,12 @@
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<title>GtkPrintContext: GTK+ 3 Reference Manual</title>
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@ -167,59 +167,117 @@ of the cairo surface.</p>
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<a class="link" href="gtk3-High-level-Printing-API.html#GtkPrintOperation-draw-page" title="The “draw-page” signal"><span class="type">“draw-page”</span></a> signals on the <a class="link" href="gtk3-High-level-Printing-API.html#GtkPrintOperation"><span class="type">GtkPrintOperation</span></a>.</p>
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<div class="refsect3">
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<a name="id-1.3.17.3.7.4"></a><h4>Using GtkPrintContext in a <a class="link" href="gtk3-High-level-Printing-API.html#GtkPrintOperation-draw-page" title="The “draw-page” signal"><span class="type">“draw-page”</span></a> callback</h4>
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<div class="informalexample"><pre class="programlisting">
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static void
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draw_page (GtkPrintOperation *operation,
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GtkPrintContext *context,
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int page_nr)
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{
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cairo_t *cr;
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PangoLayout *layout;
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PangoFontDescription *desc;
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<div class="informalexample">
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<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
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<tbody>
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<tr>
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<td class="listing_lines" align="right"><pre>1
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51</pre></td>
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<td class="listing_code"><pre class="programlisting"><span class="keyword">static</span><span class="normal"> </span><span class="type">void</span>
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<span class="function">draw_page</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GtkPrintOperation</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">operation</span><span class="symbol">,</span>
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<span class="normal"> </span><span class="usertype">GtkPrintContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">context</span><span class="symbol">,</span>
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<span class="normal"> </span><span class="type">int</span><span class="normal"> page_nr</span><span class="symbol">)</span>
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<span class="cbracket">{</span>
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<span class="normal"> </span><span class="usertype">cairo_t</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">cr</span><span class="symbol">;</span>
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<span class="normal"> </span><span class="usertype">PangoLayout</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">layout</span><span class="symbol">;</span>
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<span class="normal"> </span><span class="usertype">PangoFontDescription</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">desc</span><span class="symbol">;</span>
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cr = gtk_print_context_get_cairo_context (context);
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<span class="normal"> cr </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GtkPrintContext.html#gtk-print-context-get-cairo-context">gtk_print_context_get_cairo_context</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">);</span>
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// Draw a red rectangle, as wide as the paper (inside the margins)
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cairo_set_source_rgb (cr, 1.0, 0, 0);
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cairo_rectangle (cr, 0, 0, gtk_print_context_get_width (context), 50);
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<span class="normal"> </span><span class="comment">// Draw a red rectangle, as wide as the paper (inside the margins)</span>
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<span class="normal"> </span><span class="function">cairo_set_source_rgb</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">1.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_rectangle</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="function"><a href="GtkPrintContext.html#gtk-print-context-get-width">gtk_print_context_get_width</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">),</span><span class="normal"> </span><span class="number">50</span><span class="symbol">);</span>
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cairo_fill (cr);
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<span class="normal"> </span><span class="function">cairo_fill</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">);</span>
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// Draw some lines
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cairo_move_to (cr, 20, 10);
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cairo_line_to (cr, 40, 20);
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cairo_arc (cr, 60, 60, 20, 0, M_PI);
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cairo_line_to (cr, 80, 20);
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<span class="normal"> </span><span class="comment">// Draw some lines</span>
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<span class="normal"> </span><span class="function">cairo_move_to</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">20</span><span class="symbol">,</span><span class="normal"> </span><span class="number">10</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_line_to</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">40</span><span class="symbol">,</span><span class="normal"> </span><span class="number">20</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_arc</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">60</span><span class="symbol">,</span><span class="normal"> </span><span class="number">60</span><span class="symbol">,</span><span class="normal"> </span><span class="number">20</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> M_PI</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_line_to</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">80</span><span class="symbol">,</span><span class="normal"> </span><span class="number">20</span><span class="symbol">);</span>
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_set_line_width (cr, 5);
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cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
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<span class="normal"> </span><span class="function">cairo_set_source_rgb</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_set_line_width</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">5</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_set_line_cap</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> CAIRO_LINE_CAP_ROUND</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_set_line_join</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> CAIRO_LINE_JOIN_ROUND</span><span class="symbol">);</span>
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cairo_stroke (cr);
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<span class="normal"> </span><span class="function">cairo_stroke</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">);</span>
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// Draw some text
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layout = gtk_print_context_create_pango_layout (context);
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pango_layout_set_text (layout, "Hello World! Printing is easy", -1);
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desc = pango_font_description_from_string ("sans 28");
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pango_layout_set_font_description (layout, desc);
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pango_font_description_free (desc);
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<span class="normal"> </span><span class="comment">// Draw some text</span>
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<span class="normal"> layout </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GtkPrintContext.html#gtk-print-context-create-pango-layout">gtk_print_context_create_pango_layout</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">context</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">pango_layout_set_text</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">layout</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"Hello World! Printing is easy"</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">-</span><span class="number">1</span><span class="symbol">);</span>
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<span class="normal"> desc </span><span class="symbol">=</span><span class="normal"> </span><span class="function">pango_font_description_from_string</span><span class="normal"> </span><span class="symbol">(</span><span class="string">"sans 28"</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">pango_layout_set_font_description</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">layout</span><span class="symbol">,</span><span class="normal"> desc</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">pango_font_description_free</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">desc</span><span class="symbol">);</span>
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cairo_move_to (cr, 30, 20);
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pango_cairo_layout_path (cr, layout);
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<span class="normal"> </span><span class="function">cairo_move_to</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">30</span><span class="symbol">,</span><span class="normal"> </span><span class="number">20</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">pango_cairo_layout_path</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> layout</span><span class="symbol">);</span>
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// Font Outline
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cairo_set_source_rgb (cr, 0.93, 1.0, 0.47);
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cairo_set_line_width (cr, 0.5);
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cairo_stroke_preserve (cr);
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<span class="normal"> </span><span class="comment">// Font Outline</span>
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<span class="normal"> </span><span class="function">cairo_set_source_rgb</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0.93</span><span class="symbol">,</span><span class="normal"> </span><span class="number">1.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0.47</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_set_line_width</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0.5</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_stroke_preserve</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">);</span>
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// Font Fill
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cairo_set_source_rgb (cr, 0, 0.0, 1.0);
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cairo_fill (cr);
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<span class="normal"> </span><span class="comment">// Font Fill</span>
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<span class="normal"> </span><span class="function">cairo_set_source_rgb</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">0.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">1.0</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">cairo_fill</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">cr</span><span class="symbol">);</span>
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<span class="normal"> </span><span class="function">g_object_unref</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">layout</span><span class="symbol">);</span>
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<span class="cbracket">}</span></pre></td>
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</tr>
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</tbody>
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</table>
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</div>
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g_object_unref (layout);
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}
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</pre></div>
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<p></p>
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<p>Printing support was added in GTK+ 2.10.</p>
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</div>
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@ -602,6 +660,6 @@ gtk_print_context_get_hard_margins (<em class="parameter"><code><a class="link"
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