Pileus Git - ~andy/gtk/blob - gtk/gtkhpaned.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 "gtkhpaned.h"
  19 #include "gtkmain.h"
  20 #include "gtksignal.h"
  21
  22 static void gtk_hpaned_class_init       (GtkHPanedClass *klass);
  23 static void gtk_hpaned_init             (GtkHPaned      *hpaned);
  24 static void gtk_hpaned_size_request     (GtkWidget      *widget,
  25                                          GtkRequisition *requisition);
  26 static void gtk_hpaned_size_allocate    (GtkWidget          *widget,
  27                                          GtkAllocation      *allocation);
  28 static void gtk_hpaned_draw             (GtkWidget    *widget,
  29                                          GdkRectangle *area);
  30 static void gtk_hpaned_xor_line         (GtkPaned *paned);
  31 static gint gtk_hpaned_button_press     (GtkWidget *widget,
  32                                          GdkEventButton *event);
  33 static gint gtk_hpaned_button_release   (GtkWidget *widget,
  34                                          GdkEventButton *event);
  35 static gint gtk_hpaned_motion           (GtkWidget *widget,
  36                                          GdkEventMotion *event);
  37
  38 guint
  39 gtk_hpaned_get_type ()
  40 {
  41   static guint hpaned_type = 0;
  42
  43   if (!hpaned_type)
  44     {
  45       GtkTypeInfo hpaned_info =
  46       {
  47         "GtkHPaned",
  48         sizeof (GtkHPaned),
  49         sizeof (GtkHPanedClass),
  50         (GtkClassInitFunc) gtk_hpaned_class_init,
  51         (GtkObjectInitFunc) gtk_hpaned_init,
  52         (GtkArgFunc) NULL,
  53       };
  54
  55       hpaned_type = gtk_type_unique (gtk_paned_get_type (), &hpaned_info);
  56     }
  57
  58   return hpaned_type;
  59 }
  60
  61 static void
  62 gtk_hpaned_class_init (GtkHPanedClass *class)
  63 {
  64   GtkWidgetClass *widget_class;
  65
  66   widget_class = (GtkWidgetClass*) class;
  67
  68   widget_class->size_request = gtk_hpaned_size_request;
  69   widget_class->size_allocate = gtk_hpaned_size_allocate;
  70   widget_class->draw = gtk_hpaned_draw;
  71   widget_class->button_press_event = gtk_hpaned_button_press;
  72   widget_class->button_release_event = gtk_hpaned_button_release;
  73   widget_class->motion_notify_event = gtk_hpaned_motion;
  74 }
  75
  76 static void
  77 gtk_hpaned_init (GtkHPaned *hpaned)
  78 {
  79 }
  80
  81 GtkWidget*
  82 gtk_hpaned_new ()
  83 {
  84   GtkHPaned *hpaned;
  85
  86   hpaned = gtk_type_new (gtk_hpaned_get_type ());
  87
  88   return GTK_WIDGET (hpaned);
  89 }
  90
  91 static void
  92 gtk_hpaned_size_request (GtkWidget      *widget,
  93                          GtkRequisition *requisition)
  94 {
  95   GtkPaned *paned;
  96
  97   g_return_if_fail (widget != NULL);
  98   g_return_if_fail (GTK_IS_HPANED (widget));
  99   g_return_if_fail (requisition != NULL);
 100
 101   paned = GTK_PANED (widget);
 102   requisition->width = 0;
 103   requisition->height = 0;
 104
 105   if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 106     {
 107       gtk_widget_size_request (paned->child1, &paned->child1->requisition);
 108
 109       requisition->height = paned->child1->requisition.height;
 110       requisition->width = paned->child1->requisition.width;
 111     }
 112
 113   if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 114     {
 115       gtk_widget_size_request (paned->child2, &paned->child2->requisition);
 116
 117       requisition->height = MAX(requisition->height,
 118                                 paned->child2->requisition.height);
 119       requisition->width += paned->child2->requisition.width;
 120     }
 121
 122   requisition->width += GTK_CONTAINER (paned)->border_width * 2 + paned->gutter_size;
 123   requisition->height += GTK_CONTAINER (paned)->border_width * 2;
 124 }
 125
 126 static void
 127 gtk_hpaned_size_allocate (GtkWidget     *widget,
 128                           GtkAllocation *allocation)
 129 {
 130   GtkPaned *paned;
 131   GtkAllocation child1_allocation;
 132   GtkAllocation child2_allocation;
 133   guint16 border_width;
 134
 135   g_return_if_fail (widget != NULL);
 136   g_return_if_fail (GTK_IS_HPANED (widget));
 137   g_return_if_fail (allocation != NULL);
 138
 139   widget->allocation = *allocation;
 140
 141   paned = GTK_PANED (widget);
 142   border_width = GTK_CONTAINER (paned)->border_width;
 143
 144   if (!paned->position_set)
 145     {
 146       if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 147         paned->child1_size = paned->child1->requisition.width;
 148       else
 149         paned->child1_size = 0;
 150     }
 151
 152   /* Move the handle first so we don't get extra expose events */
 153
 154   paned->handle_xpos = allocation->x + paned->child1_size + border_width + paned->gutter_size / 2 - paned->handle_size / 2;
 155   paned->handle_ypos = allocation->y + allocation->height - border_width - 2*paned->handle_size;
 156
 157   if (GTK_WIDGET_REALIZED (widget))
 158     {
 159       gdk_window_move (paned->handle, paned->handle_xpos, paned->handle_ypos);
 160       gdk_window_raise (paned->handle);
 161     }
 162
 163   if (GTK_WIDGET_MAPPED (widget))
 164     {
 165       gdk_window_clear_area (widget->window,
 166                              paned->groove_rectangle.x,
 167                              paned->groove_rectangle.y,
 168                              paned->groove_rectangle.width,
 169                              paned->groove_rectangle.height);
 170     }
 171
 172   child1_allocation.height = child2_allocation.height = allocation->height - border_width * 2;
 173   child1_allocation.width = paned->child1_size;
 174   child1_allocation.x = allocation->x + border_width;
 175   child1_allocation.y = child2_allocation.y = allocation->y + border_width;
 176
 177   paned->groove_rectangle.x = child1_allocation.x
 178     + child1_allocation.width + paned->gutter_size / 2 - 1;
 179   paned->groove_rectangle.y = allocation->y;
 180   paned->groove_rectangle.width = 2;
 181   paned->groove_rectangle.height = allocation->height;
 182
 183   child2_allocation.x = paned->groove_rectangle.x + paned->gutter_size / 2 + 1;
 184   child2_allocation.width = allocation->x + allocation->width
 185     - child2_allocation.x - border_width;
 186
 187   /* Now allocate the childen, making sure, when resizing not to
 188    * overlap the windows */
 189   if (GTK_WIDGET_MAPPED(widget) &&
 190       paned->child1 && GTK_WIDGET_VISIBLE (paned->child1) &&
 191       paned->child1->allocation.width < child1_allocation.width)
 192     {
 193       if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 194         gtk_widget_size_allocate (paned->child2, &child2_allocation);
 195       gtk_widget_size_allocate (paned->child1, &child1_allocation);
 196     }
 197   else
 198     {
 199       if (paned->child1 && GTK_WIDGET_VISIBLE (paned->child1))
 200         gtk_widget_size_allocate (paned->child1, &child1_allocation);
 201       if (paned->child2 && GTK_WIDGET_VISIBLE (paned->child2))
 202         gtk_widget_size_allocate (paned->child2, &child2_allocation);
 203     }
 204 }
 205
 206 static void
 207 gtk_hpaned_draw (GtkWidget    *widget,
 208                 GdkRectangle *area)
 209 {
 210   GtkPaned *paned;
 211   GdkRectangle child_area;
 212   guint16 border_width;
 213
 214   g_return_if_fail (widget != NULL);
 215   g_return_if_fail (GTK_IS_PANED (widget));
 216
 217   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
 218     {
 219       paned = GTK_PANED (widget);
 220       border_width = GTK_CONTAINER (paned)->border_width;
 221
 222       if (paned->child1 &&
 223           gtk_widget_intersect (paned->child1, area, &child_area))
 224         gtk_widget_draw (paned->child1, &child_area);
 225       if (paned->child2 &&
 226           gtk_widget_intersect (paned->child2, area, &child_area))
 227         gtk_widget_draw (paned->child2, &child_area);
 228
 229       gdk_draw_line (widget->window,
 230                      widget->style->dark_gc[widget->state],
 231                      widget->allocation.x + border_width + paned->child1_size + paned->gutter_size / 2 - 1,
 232                      widget->allocation.y,
 233                      widget->allocation.x + border_width + paned->child1_size + paned->gutter_size / 2 - 1,
 234                      widget->allocation.y + widget->allocation.height - 1);
 235       gdk_draw_line (widget->window,
 236                      widget->style->light_gc[widget->state],
 237                      widget->allocation.x + border_width + paned->child1_size + paned->gutter_size / 2,
 238                      widget->allocation.y,
 239                      widget->allocation.x + border_width + paned->child1_size + paned->gutter_size / 2,
 240                      widget->allocation.y + widget->allocation.height - 1);
 241     }
 242 }
 243
 244 static void
 245 gtk_hpaned_xor_line (GtkPaned *paned)
 246 {
 247   GtkWidget *widget;
 248   GdkGCValues values;
 249   guint16 xpos;
 250
 251   widget = GTK_WIDGET(paned);
 252
 253   if (!paned->xor_gc)
 254     {
 255       values.foreground = widget->style->white;
 256       values.function = GDK_XOR;
 257       values.subwindow_mode = GDK_INCLUDE_INFERIORS;
 258       paned->xor_gc = gdk_gc_new_with_values (widget->window,
 259                                               &values,
 260                                               GDK_GC_FOREGROUND |
 261                                               GDK_GC_FUNCTION |
 262                                               GDK_GC_SUBWINDOW);
 263     }
 264
 265   xpos = widget->allocation.x + paned->child1_size
 266     + GTK_CONTAINER(paned)->border_width + paned->gutter_size / 2;
 267
 268   gdk_draw_line (widget->window, paned->xor_gc,
 269                  xpos,
 270                  widget->allocation.y,
 271                  xpos,
 272                  widget->allocation.y + widget->allocation.height - 1);
 273 }
 274
 275 static gint
 276 gtk_hpaned_button_press (GtkWidget *widget, GdkEventButton *event)
 277 {
 278   GtkPaned *paned;
 279
 280   g_return_val_if_fail (widget != NULL,FALSE);
 281   g_return_val_if_fail (GTK_IS_PANED (widget),FALSE);
 282
 283   paned = GTK_PANED (widget);
 284
 285   if (!paned->in_drag &&
 286       (event->window == paned->handle) && (event->button == 1))
 287     {
 288       paned->in_drag = TRUE;
 289       /* We need a server grab here, not gtk_grab_add(), since
 290        * we don't want to pass events on to the widget's children */
 291       gdk_pointer_grab (paned->handle, FALSE,
 292                         GDK_POINTER_MOTION_HINT_MASK
 293                         | GDK_BUTTON1_MOTION_MASK
 294                         | GDK_BUTTON_RELEASE_MASK,
 295                         NULL, NULL, event->time);
 296       paned->child1_size += event->x - paned->handle_size / 2;
 297       paned->child1_size = CLAMP (paned->child1_size, 0,
 298                                   widget->allocation.width - paned->gutter_size
 299                                   - 2 * GTK_CONTAINER (paned)->border_width);
 300       gtk_hpaned_xor_line (paned);
 301     }
 302
 303   return TRUE;
 304 }
 305
 306 static gint
 307 gtk_hpaned_button_release (GtkWidget *widget, GdkEventButton *event)
 308 {
 309   GtkPaned *paned;
 310
 311   g_return_val_if_fail (widget != NULL,FALSE);
 312   g_return_val_if_fail (GTK_IS_PANED (widget),FALSE);
 313
 314   paned = GTK_PANED (widget);
 315
 316   if (paned->in_drag && (event->button == 1))
 317     {
 318       gtk_hpaned_xor_line (paned);
 319       paned->in_drag = FALSE;
 320       paned->position_set = TRUE;
 321       gdk_pointer_ungrab (event->time);
 322       gtk_widget_queue_resize (GTK_WIDGET (paned));
 323     }
 324
 325   return TRUE;
 326 }
 327
 328 static gint
 329 gtk_hpaned_motion (GtkWidget *widget, GdkEventMotion *event)
 330 {
 331   GtkPaned *paned;
 332   gint x;
 333
 334   g_return_val_if_fail (widget != NULL, FALSE);
 335   g_return_val_if_fail (GTK_IS_PANED (widget), FALSE);
 336
 337   if (event->is_hint || event->window != widget->window)
 338     gtk_widget_get_pointer(widget, &x, NULL);
 339   else
 340     x = event->x;
 341
 342   paned = GTK_PANED (widget);
 343
 344   if (paned->in_drag)
 345     {
 346       gtk_hpaned_xor_line (paned);
 347       paned->child1_size = x - GTK_CONTAINER (paned)->border_width - paned->gutter_size / 2;
 348       paned->child1_size = CLAMP (paned->child1_size, 0,
 349                                   widget->allocation.width - paned->gutter_size
 350                                   - 2 * GTK_CONTAINER (paned)->border_width);
 351       gtk_hpaned_xor_line (paned);
 352     }
 353
 354   return TRUE;
 355 }