Pileus Git - ~andy/gtk/blob - gtk/gtkprogressbar.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #include "gtkprogressbar.h"
  20
  21
  22 #define MIN_WIDTH   200
  23 #define MIN_HEIGHT  20
  24
  25
  26 static void gtk_progress_bar_class_init    (GtkProgressBarClass *klass);
  27 static void gtk_progress_bar_init          (GtkProgressBar      *pbar);
  28 static void gtk_progress_bar_realize       (GtkWidget           *widget);
  29 static void gtk_progress_bar_size_allocate (GtkWidget           *widget,
  30                                             GtkAllocation       *allocation);
  31 static gint gtk_progress_bar_expose        (GtkWidget           *widget,
  32                                             GdkEventExpose      *event);
  33 static void gtk_progress_bar_make_pixmap   (GtkProgressBar      *pbar);
  34 static void gtk_progress_bar_paint         (GtkProgressBar      *pbar);
  35
  36
  37 guint
  38 gtk_progress_bar_get_type (void)
  39 {
  40   static guint progress_bar_type = 0;
  41
  42   if (!progress_bar_type)
  43     {
  44       GtkTypeInfo progress_bar_info =
  45       {
  46         "GtkProgressBar",
  47         sizeof (GtkProgressBar),
  48         sizeof (GtkProgressBarClass),
  49         (GtkClassInitFunc) gtk_progress_bar_class_init,
  50         (GtkObjectInitFunc) gtk_progress_bar_init,
  51         /* reserved_1 */ NULL,
  52         /* reserved_2 */ NULL,
  53         (GtkClassInitFunc) NULL,
  54       };
  55
  56       progress_bar_type = gtk_type_unique (gtk_widget_get_type (), &progress_bar_info);
  57     }
  58
  59   return progress_bar_type;
  60 }
  61
  62 static void
  63 gtk_progress_bar_class_init (GtkProgressBarClass *class)
  64 {
  65   GtkWidgetClass *widget_class;
  66
  67   widget_class = (GtkWidgetClass*) class;
  68
  69   widget_class->realize = gtk_progress_bar_realize;
  70   widget_class->size_allocate = gtk_progress_bar_size_allocate;
  71   widget_class->expose_event = gtk_progress_bar_expose;
  72 }
  73
  74 static void
  75 gtk_progress_bar_init (GtkProgressBar *pbar)
  76 {
  77   GTK_WIDGET_SET_FLAGS (pbar, GTK_BASIC);
  78
  79   GTK_WIDGET (pbar)->requisition.width = MIN_WIDTH;
  80   GTK_WIDGET (pbar)->requisition.height = MIN_HEIGHT;
  81   pbar->offscreen_pixmap = NULL;
  82   pbar->percentage = 0;
  83 }
  84
  85
  86 GtkWidget*
  87 gtk_progress_bar_new (void)
  88 {
  89   return GTK_WIDGET (gtk_type_new (gtk_progress_bar_get_type ()));
  90 }
  91
  92 void
  93 gtk_progress_bar_update (GtkProgressBar *pbar,
  94                          gfloat          percentage)
  95 {
  96   g_return_if_fail (pbar != NULL);
  97   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
  98
  99   if (percentage < 0.0)
 100     percentage = 0.0;
 101   else if (percentage > 1.0)
 102     percentage = 1.0;
 103
 104   if (pbar->percentage != percentage)
 105     {
 106       pbar->percentage = percentage;
 107       gtk_progress_bar_paint (pbar);
 108       gtk_widget_queue_draw (GTK_WIDGET (pbar));
 109     }
 110 }
 111
 112 static void
 113 gtk_progress_bar_realize (GtkWidget *widget)
 114 {
 115   GtkProgressBar *pbar;
 116   GdkWindowAttr attributes;
 117   gint attributes_mask;
 118
 119   g_return_if_fail (widget != NULL);
 120   g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
 121
 122   pbar = GTK_PROGRESS_BAR (widget);
 123   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 124
 125   attributes.window_type = GDK_WINDOW_CHILD;
 126   attributes.x = widget->allocation.x;
 127   attributes.y = widget->allocation.y;
 128   attributes.width = widget->allocation.width;
 129   attributes.height = widget->allocation.height;
 130   attributes.wclass = GDK_INPUT_OUTPUT;
 131   attributes.visual = gtk_widget_get_visual (widget);
 132   attributes.colormap = gtk_widget_get_colormap (widget);
 133   attributes.event_mask = gtk_widget_get_events (widget);
 134   attributes.event_mask |= GDK_EXPOSURE_MASK;
 135
 136   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 137
 138   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 139   gdk_window_set_user_data (widget->window, pbar);
 140
 141   widget->style = gtk_style_attach (widget->style, widget->window);
 142   gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
 143
 144   gtk_progress_bar_make_pixmap (pbar);
 145 }
 146
 147 static void
 148 gtk_progress_bar_size_allocate (GtkWidget     *widget,
 149                                 GtkAllocation *allocation)
 150 {
 151   g_return_if_fail (widget != NULL);
 152   g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
 153   g_return_if_fail (allocation != NULL);
 154
 155   widget->allocation = *allocation;
 156
 157   if (GTK_WIDGET_REALIZED (widget))
 158     {
 159       gdk_window_move_resize (widget->window,
 160                               allocation->x, allocation->y,
 161                               allocation->width, allocation->height);
 162
 163       gtk_progress_bar_make_pixmap (GTK_PROGRESS_BAR (widget));
 164     }
 165 }
 166
 167 static gint
 168 gtk_progress_bar_expose (GtkWidget      *widget,
 169                          GdkEventExpose *event)
 170 {
 171   GtkProgressBar *pbar;
 172
 173   g_return_val_if_fail (widget != NULL, FALSE);
 174   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (widget), FALSE);
 175   g_return_val_if_fail (event != NULL, FALSE);
 176
 177   if (GTK_WIDGET_DRAWABLE (widget))
 178     {
 179       pbar = GTK_PROGRESS_BAR (widget);
 180
 181       gdk_draw_pixmap (widget->window,
 182                        widget->style->black_gc,
 183                        pbar->offscreen_pixmap,
 184                        0, 0, 0, 0,
 185                        widget->allocation.width,
 186                        widget->allocation.height);
 187     }
 188
 189   return FALSE;
 190 }
 191
 192 static void
 193 gtk_progress_bar_make_pixmap (GtkProgressBar *pbar)
 194 {
 195   GtkWidget *widget;
 196
 197   g_return_if_fail (pbar != NULL);
 198   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 199
 200   if (GTK_WIDGET_REALIZED (pbar))
 201     {
 202       widget = GTK_WIDGET (pbar);
 203
 204       if (pbar->offscreen_pixmap)
 205         gdk_pixmap_unref (pbar->offscreen_pixmap);
 206
 207       pbar->offscreen_pixmap = gdk_pixmap_new (widget->window,
 208                                                widget->allocation.width,
 209                                                widget->allocation.height,
 210                                                -1);
 211
 212       gtk_progress_bar_paint (pbar);
 213     }
 214 }
 215
 216 static void
 217 gtk_progress_bar_paint (GtkProgressBar *pbar)
 218 {
 219   GtkWidget *widget;
 220   int amount;
 221
 222   g_return_if_fail (pbar != NULL);
 223   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 224
 225   if (pbar->offscreen_pixmap)
 226     {
 227       widget = GTK_WIDGET (pbar);
 228
 229       gtk_draw_shadow (widget->style,
 230                        pbar->offscreen_pixmap,
 231                        GTK_STATE_NORMAL, GTK_SHADOW_IN, 0, 0,
 232                        widget->allocation.width,
 233                        widget->allocation.height);
 234
 235       gdk_draw_rectangle (pbar->offscreen_pixmap,
 236                           widget->style->bg_gc[GTK_STATE_ACTIVE], TRUE,
 237                           widget->style->klass->xthickness,
 238                           widget->style->klass->ythickness,
 239                           widget->allocation.width - widget->style->klass->xthickness * 2,
 240                           widget->allocation.height - widget->style->klass->ythickness * 2);
 241
 242
 243       amount = pbar->percentage * (widget->allocation.width - widget->style->klass->xthickness * 2);
 244       if (amount > 0)
 245         {
 246           gdk_draw_rectangle (pbar->offscreen_pixmap,
 247                               widget->style->bg_gc[GTK_STATE_PRELIGHT], TRUE,
 248                               widget->style->klass->xthickness,
 249                               widget->style->klass->ythickness,
 250                               amount,
 251                               widget->allocation.height - widget->style->klass->ythickness * 2);
 252
 253           gtk_draw_shadow (widget->style,
 254                            pbar->offscreen_pixmap,
 255                            GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 256                            widget->style->klass->xthickness,
 257                            widget->style->klass->ythickness,
 258                            amount,
 259                            widget->allocation.height - widget->style->klass->ythickness * 2);
 260         }
 261     }
 262 }