libs3dw/label.c

   1 /*
   2  * label.c
   3  *
   4  * Copyright (C) 2006-2011  Simon Wunderlich <dotslash@packetmixer.de>
   5  *
   6  * This file is part of the s3d Widgets, a Widget Library for s3d.
   7  * See http://s3d.berlios.de/ for more updates.
   8  *
   9  * s3d Widgets is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * s3d Widgets is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with the s3d Widgets; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  22  */
  23
  24
  25 #include <s3d.h>
  26 #include <s3dw.h>
  27 #include <s3dw_int.h>
  28 #include <stdlib.h> /* malloc() */
  29 #include <string.h> /* strdup() */
  30
  31 void s3dw_label_draw(s3dw_widget *widget)
  32 {
  33         s3dw_label *label = (s3dw_label *)widget;
  34         float length;
  35         widget->oid = s3d_draw_string(label->text, &length);
  36         s3d_pep_materials_a(widget->oid, widget->style->text_mat, 1);
  37         s3d_link(widget->oid, widget->parent->oid);
  38         s3d_translate(widget->oid, widget->x, -widget->y, 0.1);
  39         widget->width = length + 1;
  40         widget->height = 2;
  41 }
  42 /* show the label */
  43 void s3dw_label_show(s3dw_widget *widget)
  44 {
  45         s3d_flags_on(widget->oid, S3D_OF_VISIBLE | S3D_OF_SELECTABLE);
  46 }
  47 /* hides the label */
  48 void s3dw_label_hide(s3dw_widget *widget)
  49 {
  50         s3d_flags_off(widget->oid, S3D_OF_VISIBLE | S3D_OF_SELECTABLE);
  51 }
  52
  53 /** \brief change label text
  54  *
  55  * Change the text in the referenced label to the specified text.
  56  */
  57 void s3dw_label_change_text(s3dw_label *label, const char *text)
  58 {
  59         s3dw_widget *widget = (s3dw_widget *)label;
  60
  61         /* redraw the text ... */
  62         free(label->text);
  63         label->text = strdup(text);
  64         s3dw_label_erase(widget);
  65         s3dw_label_draw(widget);
  66         if (widget->flags&S3DW_ONSCREEN)
  67                 s3dw_label_show(widget);
  68 }
  69
  70 /** \brief create a new label in the surface
  71  *
  72  * Creates a new label on the surface, with "text" written on it and the upper
  73  * left corner at (posx,posy) on the surface.
  74  *
  75  * See s3dw_label for information about callbacks which may be defined.
  76  */
  77 s3dw_label *s3dw_label_new(const s3dw_surface *surface, const char *text, float posx, float posy)
  78 {
  79         s3dw_label *label;
  80         s3dw_widget *widget;
  81         label = (s3dw_label *)malloc(sizeof(s3dw_label));
  82         widget = s3dw_widget_new((s3dw_widget *)label);
  83         widget->type = S3DW_TLABEL;
  84         widget->x = posx;
  85         widget->y = posy;
  86         label->text = strdup(text);
  87         label->onclick = s3dw_nothing;
  88         s3dw_widget_append((s3dw_widget *)surface, widget);
  89         s3dw_label_draw(widget);
  90         return label;
  91 }
  92
  93 void s3dw_label_erase(s3dw_widget *widget)
  94 {
  95         s3d_del_object(widget->oid);
  96 }
  97 /* destroy the label */
  98 void s3dw_label_destroy(s3dw_widget *widget)
  99 {
 100         s3dw_label *label = (s3dw_label *)widget;
 101         s3dw_label_erase(widget);
 102         free(label->text);
 103         free(label);
 104 }
 105 /* handle key events */
 106 int s3dw_label_event_key(s3dw_widget *S3DUNUSED(widget), struct s3d_key_event *S3DUNUSED(keys))
 107 {
 108         return 0;
 109 }
 110 /* handle click events */
 111 int s3dw_label_event_click(s3dw_widget *widget, uint32_t oid)
 112 {
 113         s3dw_label *label = (s3dw_label *)widget;
 114         if (widget->oid == oid) {
 115                 label->onclick(widget);
 116                 return 1;
 117         }
 118         return 0;
 119 }