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 Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18 #include "gtkprogressbar.h"
  19
  20
  21 #define MIN_WIDTH   200
  22 #define MIN_HEIGHT  20
  23
  24
  25 static void gtk_progress_bar_class_init    (GtkProgressBarClass *klass);
  26 static void gtk_progress_bar_init          (GtkProgressBar      *pbar);
  27 static void gtk_progress_bar_realize       (GtkWidget           *widget);
  28 static void gtk_progress_bar_size_allocate (GtkWidget           *widget,
  29                                             GtkAllocation       *allocation);
  30 static gint gtk_progress_bar_expose        (GtkWidget           *widget,
  31                                             GdkEventExpose      *event);
  32 static void gtk_progress_bar_make_pixmap   (GtkProgressBar      *pbar);
  33 static void gtk_progress_bar_paint         (GtkProgressBar      *pbar);
  34
  35
  36 guint
  37 gtk_progress_bar_get_type ()
  38 {
  39   static guint progress_bar_type = 0;
  40
  41   if (!progress_bar_type)
  42     {
  43       GtkTypeInfo progress_bar_info =
  44       {
  45         "GtkProgressBar",
  46         sizeof (GtkProgressBar),
  47         sizeof (GtkProgressBarClass),
  48         (GtkClassInitFunc) gtk_progress_bar_class_init,
  49         (GtkObjectInitFunc) gtk_progress_bar_init,
  50         (GtkArgFunc) NULL,
  51       };
  52
  53       progress_bar_type = gtk_type_unique (gtk_widget_get_type (), &progress_bar_info);
  54     }
  55
  56   return progress_bar_type;
  57 }
  58
  59 static void
  60 gtk_progress_bar_class_init (GtkProgressBarClass *class)
  61 {
  62   GtkWidgetClass *widget_class;
  63
  64   widget_class = (GtkWidgetClass*) class;
  65
  66   widget_class->realize = gtk_progress_bar_realize;
  67   widget_class->size_allocate = gtk_progress_bar_size_allocate;
  68   widget_class->expose_event = gtk_progress_bar_expose;
  69 }
  70
  71 static void
  72 gtk_progress_bar_init (GtkProgressBar *pbar)
  73 {
  74   GTK_WIDGET_SET_FLAGS (pbar, GTK_BASIC);
  75
  76   GTK_WIDGET (pbar)->requisition.width = MIN_WIDTH;
  77   GTK_WIDGET (pbar)->requisition.height = MIN_HEIGHT;
  78   pbar->offscreen_pixmap = NULL;
  79   pbar->percentage = 0;
  80 }
  81
  82
  83 GtkWidget*
  84 gtk_progress_bar_new ()
  85 {
  86   return GTK_WIDGET (gtk_type_new (gtk_progress_bar_get_type ()));
  87 }
  88
  89 void
  90 gtk_progress_bar_update (GtkProgressBar *pbar,
  91                          gfloat          percentage)
  92 {
  93   g_return_if_fail (pbar != NULL);
  94   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
  95
  96   if (percentage < 0.0)
  97     percentage = 0.0;
  98   else if (percentage > 1.0)
  99     percentage = 1.0;
 100
 101   if (pbar->percentage != percentage)
 102     {
 103       pbar->percentage = percentage;
 104       gtk_progress_bar_paint (pbar);
 105       gtk_widget_queue_draw (GTK_WIDGET (pbar));
 106     }
 107 }
 108
 109 static void
 110 gtk_progress_bar_realize (GtkWidget *widget)
 111 {
 112   GtkProgressBar *pbar;
 113   GdkWindowAttr attributes;
 114   gint attributes_mask;
 115
 116   g_return_if_fail (widget != NULL);
 117   g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
 118
 119   pbar = GTK_PROGRESS_BAR (widget);
 120   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 121
 122   attributes.window_type = GDK_WINDOW_CHILD;
 123   attributes.x = widget->allocation.x;
 124   attributes.y = widget->allocation.y;
 125   attributes.width = widget->allocation.width;
 126   attributes.height = widget->allocation.height;
 127   attributes.wclass = GDK_INPUT_OUTPUT;
 128   attributes.visual = gtk_widget_get_visual (widget);
 129   attributes.colormap = gtk_widget_get_colormap (widget);
 130   attributes.event_mask = gtk_widget_get_events (widget);
 131   attributes.event_mask |= GDK_EXPOSURE_MASK;
 132
 133   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 134
 135   widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
 136   gdk_window_set_user_data (widget->window, pbar);
 137
 138   widget->style = gtk_style_attach (widget->style, widget->window);
 139   gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
 140
 141   gtk_progress_bar_make_pixmap (pbar);
 142 }
 143
 144 static void
 145 gtk_progress_bar_size_allocate (GtkWidget     *widget,
 146                                 GtkAllocation *allocation)
 147 {
 148   g_return_if_fail (widget != NULL);
 149   g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
 150   g_return_if_fail (allocation != NULL);
 151
 152   widget->allocation = *allocation;
 153
 154   if (GTK_WIDGET_REALIZED (widget))
 155     {
 156       gdk_window_move_resize (widget->window,
 157                               allocation->x, allocation->y,
 158                               allocation->width, allocation->height);
 159
 160       gtk_progress_bar_make_pixmap (GTK_PROGRESS_BAR (widget));
 161     }
 162 }
 163
 164 static gint
 165 gtk_progress_bar_expose (GtkWidget      *widget,
 166                          GdkEventExpose *event)
 167 {
 168   GtkProgressBar *pbar;
 169
 170   g_return_val_if_fail (widget != NULL, FALSE);
 171   g_return_val_if_fail (GTK_IS_PROGRESS_BAR (widget), FALSE);
 172   g_return_val_if_fail (event != NULL, FALSE);
 173
 174   if (GTK_WIDGET_DRAWABLE (widget))
 175     {
 176       pbar = GTK_PROGRESS_BAR (widget);
 177
 178       gdk_draw_pixmap (widget->window,
 179                        widget->style->black_gc,
 180                        pbar->offscreen_pixmap,
 181                        0, 0, 0, 0,
 182                        widget->allocation.width,
 183                        widget->allocation.height);
 184     }
 185
 186   return FALSE;
 187 }
 188
 189 static void
 190 gtk_progress_bar_make_pixmap (GtkProgressBar *pbar)
 191 {
 192   GtkWidget *widget;
 193
 194   g_return_if_fail (pbar != NULL);
 195   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 196
 197   if (GTK_WIDGET_REALIZED (pbar))
 198     {
 199       widget = GTK_WIDGET (pbar);
 200
 201       if (pbar->offscreen_pixmap)
 202         gdk_pixmap_destroy (pbar->offscreen_pixmap);
 203
 204       pbar->offscreen_pixmap = gdk_pixmap_new (widget->window,
 205                                                widget->allocation.width,
 206                                                widget->allocation.height,
 207                                                -1);
 208
 209       gtk_progress_bar_paint (pbar);
 210     }
 211 }
 212
 213 static void
 214 gtk_progress_bar_paint (GtkProgressBar *pbar)
 215 {
 216   GtkWidget *widget;
 217   int amount;
 218
 219   g_return_if_fail (pbar != NULL);
 220   g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
 221
 222   if (pbar->offscreen_pixmap)
 223     {
 224       widget = GTK_WIDGET (pbar);
 225
 226       gtk_draw_shadow (widget->style,
 227                        pbar->offscreen_pixmap,
 228                        GTK_STATE_NORMAL, GTK_SHADOW_IN, 0, 0,
 229                        widget->allocation.width,
 230                        widget->allocation.height);
 231
 232       gdk_draw_rectangle (pbar->offscreen_pixmap,
 233                           widget->style->bg_gc[GTK_STATE_ACTIVE], TRUE,
 234                           widget->style->klass->xthickness,
 235                           widget->style->klass->ythickness,
 236                           widget->allocation.width - widget->style->klass->xthickness * 2,
 237                           widget->allocation.height - widget->style->klass->ythickness * 2);
 238
 239
 240       amount = pbar->percentage * (widget->allocation.width - widget->style->klass->xthickness * 2);
 241       if (amount > 0)
 242         {
 243           gdk_draw_rectangle (pbar->offscreen_pixmap,
 244                               widget->style->bg_gc[GTK_STATE_PRELIGHT], TRUE,
 245                               widget->style->klass->xthickness,
 246                               widget->style->klass->ythickness,
 247                               amount,
 248                               widget->allocation.height - widget->style->klass->ythickness * 2);
 249
 250           gtk_draw_shadow (widget->style,
 251                            pbar->offscreen_pixmap,
 252                            GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
 253                            widget->style->klass->xthickness,
 254                            widget->style->klass->ythickness,
 255                            amount,
 256                            widget->allocation.height - widget->style->klass->ythickness * 2);
 257         }
 258     }
 259 }