src/wraplabel.vala

   1 // Copyright (c) 2005 VMware, Inc.
   2
   3 // This is a translation of http://git.gnome.org/browse/meld/tree/meld/ui/wraplabel.py,
   4 // which in turn is a translation of WrapLabel from libview.
   5
   6 // Permission is hereby granted, free of charge, to any person obtaining a copy
   7 // of this software and associated documentation files (the "Software"), to deal
   8 // in the Software without restriction, including without limitation the rights
   9 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 // copies of the Software, and to permit persons to whom the Software is
  11 // furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22 // SOFTWARE.
  23
  24 // Python translation from wrapLabel.{cc|h} by Gian Mario Tagliaretti
  25 // Vala translation from wraplabel.py by Zbigniew Jędrzejewski-Szmek
  26
  27 public class WrapLabel : Gtk.Label {
  28         private int _wrap_width;
  29
  30         public WrapLabel(string? text = null) {
  31                 this._wrap_width = 0;
  32                 var layout = get_layout();
  33                 layout.set_wrap(Pango.WrapMode.WORD_CHAR);
  34                 if (text != null)
  35                         this.set_text(text);
  36                 this.set_alignment(0, 0);
  37         }
  38
  39         public override void size_request(out Gtk.Requisition requisition) {
  40                 int width, height;
  41                 var layout = get_layout();
  42                 layout.get_pixel_size(out width, out height);
  43                 requisition.width = 0;
  44                 requisition.height = height;
  45         }
  46
  47         public override void size_allocate(Gdk.Rectangle allocation) {
  48                 base.size_allocate (allocation);
  49                 this._set_wrap_width(allocation.width);
  50         }
  51
  52         public new void set_text(string str) {
  53                 base.set_text(str);
  54                 this._set_wrap_width(this._wrap_width);
  55         }
  56
  57         public new void set_markup(string str) {
  58                 base.set_markup(str);
  59                 this._set_wrap_width(this._wrap_width);
  60         }
  61
  62         private void _set_wrap_width(int width) {
  63                 if (width == 0)
  64                         return;
  65
  66                 var layout = get_layout();
  67                 layout.set_width(width * Pango.SCALE);
  68                 if (_wrap_width != width) {
  69                         this._wrap_width = width;
  70                         this.queue_resize();
  71                 }
  72         }
  73 }