gntbutton.c

   1 /**
   2  * GNT - The GLib Ncurses Toolkit
   3  *
   4  * GNT is the legal property of its developers, whose names are too numerous
   5  * to list here.  Please refer to the COPYRIGHT file distributed with this
   6  * source distribution.
   7  *
   8  * This library is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "gntbutton.h"
  27 #include "gntstyle.h"
  28 #include "gntutils.h"
  29
  30 enum
  31 {
  32         SIGS = 1,
  33 };
  34
  35 static GntWidgetClass *parent_class = NULL;
  36 static gboolean small_button = FALSE;
  37
  38 static void
  39 gnt_button_draw(GntWidget *widget)
  40 {
  41         GntButton *button = GNT_BUTTON(widget);
  42         GntColorType type;
  43         gboolean focus;
  44
  45         if ((focus = gnt_widget_has_focus(widget)))
  46                 type = GNT_COLOR_HIGHLIGHT;
  47         else
  48                 type = GNT_COLOR_NORMAL;
  49
  50         wbkgdset(widget->window, '\0' | gnt_color_pair(type));
  51         mvwaddstr(widget->window, (small_button) ? 0 : 1, 2, button->priv->text);
  52         if (small_button) {
  53                 type = GNT_COLOR_HIGHLIGHT;
  54                 mvwchgat(widget->window, 0, 0, widget->priv.width, focus ? A_BOLD : A_REVERSE, type, NULL);
  55         }
  56
  57         GNTDEBUG;
  58 }
  59
  60 static void
  61 gnt_button_size_request(GntWidget *widget)
  62 {
  63         GntButton *button = GNT_BUTTON(widget);
  64         gnt_util_get_text_bound(button->priv->text,
  65                         &widget->priv.width, &widget->priv.height);
  66         widget->priv.width += 4;
  67         if (!GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_NO_BORDER))
  68                 widget->priv.height += 2;
  69 }
  70
  71 static void
  72 gnt_button_map(GntWidget *widget)
  73 {
  74         if (widget->priv.width == 0 || widget->priv.height == 0)
  75                 gnt_widget_size_request(widget);
  76         GNTDEBUG;
  77 }
  78
  79 static gboolean
  80 gnt_button_key_pressed(GntWidget *widget, const char *key)
  81 {
  82         if (strcmp(key, GNT_KEY_ENTER) == 0)
  83         {
  84                 gnt_widget_activate(widget);
  85                 return TRUE;
  86         }
  87         return FALSE;
  88 }
  89
  90 static gboolean
  91 gnt_button_clicked(GntWidget *widget, GntMouseEvent event, int x, int y)
  92 {
  93         if (event == GNT_LEFT_MOUSE_DOWN) {
  94                 gnt_widget_activate(widget);
  95                 return TRUE;
  96         }
  97         return FALSE;
  98 }
  99
 100 static void
 101 gnt_button_destroy(GntWidget *widget)
 102 {
 103         GntButton *button = GNT_BUTTON(widget);
 104         g_free(button->priv->text);
 105         g_free(button->priv);
 106 }
 107
 108 static void
 109 gnt_button_class_init(GntWidgetClass *klass)
 110 {
 111         char *style;
 112
 113         parent_class = GNT_WIDGET_CLASS(klass);
 114         parent_class->draw = gnt_button_draw;
 115         parent_class->map = gnt_button_map;
 116         parent_class->size_request = gnt_button_size_request;
 117         parent_class->key_pressed = gnt_button_key_pressed;
 118         parent_class->clicked = gnt_button_clicked;
 119         parent_class->destroy = gnt_button_destroy;
 120
 121         style = gnt_style_get_from_name(NULL, "small-button");
 122         small_button = gnt_style_parse_bool(style);
 123         g_free(style);
 124         GNTDEBUG;
 125 }
 126
 127 static void
 128 gnt_button_init(GTypeInstance *instance, gpointer class)
 129 {
 130         GntWidget *widget = GNT_WIDGET(instance);
 131         GntButton *button = GNT_BUTTON(instance);
 132         button->priv = g_new0(GntButtonPriv, 1);
 133
 134         widget->priv.minw = 4;
 135         widget->priv.minh = small_button ? 1 : 3;
 136         if (small_button)
 137                 GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_BORDER | GNT_WIDGET_NO_SHADOW);
 138         GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_GROW_X | GNT_WIDGET_GROW_Y);
 139         GNTDEBUG;
 140 }
 141
 142 /******************************************************************************
 143  * GntButton API
 144  *****************************************************************************/
 145 GType
 146 gnt_button_get_gtype(void) {
 147         static GType type = 0;
 148
 149         if(type == 0) {
 150                 static const GTypeInfo info = {
 151                         sizeof(GntButtonClass),
 152                         NULL,                                   /* base_init            */
 153                         NULL,                                   /* base_finalize        */
 154                         (GClassInitFunc)gnt_button_class_init,
 155                         NULL,                                   /* class_finalize       */
 156                         NULL,                                   /* class_data           */
 157                         sizeof(GntButton),
 158                         0,                                              /* n_preallocs          */
 159                         gnt_button_init,                        /* instance_init        */
 160                         NULL                                    /* value_table          */
 161                 };
 162
 163                 type = g_type_register_static(GNT_TYPE_WIDGET,
 164                                                                           "GntButton",
 165                                                                           &info, 0);
 166         }
 167
 168         return type;
 169 }
 170
 171 GntWidget *gnt_button_new(const char *text)
 172 {
 173         GntWidget *widget = g_object_new(GNT_TYPE_BUTTON, NULL);
 174         GntButton *button = GNT_BUTTON(widget);
 175
 176         button->priv->text = gnt_util_onscreen_fit_string(text, -1);
 177         gnt_widget_set_take_focus(widget, TRUE);
 178
 179         return widget;
 180 }
 181