New widget (GtkComboBox) and fixed gdk_window_init to initialize gdk_root_parent some more

1 files changed, 393 insertions, 0 deletions

diff --git a/gtk/gtkcombobox.c b/gtk/gtkcombobox.c
new file mode 100644
index 000000000..a9e101ff2
--- /dev/null
+++ b/gtk/gtkcombobox.c
@@ -0,0 +1,393 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ * Copyright (C) 1998 Elliot Lee
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/* NOTES about this widget:
+   It would be nice if we kept track of the last menu item that
+   people selected, so that we could allow choosing text by using
+   up/down arrows. 
+*/
+#include <ctype.h>
+#include <string.h>
+#include "gdk/gdkx.h"
+#include "gdk/gdkkeysyms.h"
+#include "gdk/gdki18n.h"
+#include "gtkcombobox.h"
+#include "gtkmain.h"
+#include "gtksignal.h"
+#include "gtkmenu.h"
+#include "gtkmenuitem.h"
+#include "gtklabel.h"
+#include "gtkbin.h"
+
+#define ARROW_SIZE_X 20
+#define ARROW_SIZE_Y 20
+#define ARROW_PADDING 4
+
+static void gtk_combo_box_class_init   (GtkComboBoxClass *class);
+static void gtk_combo_box_init         (GtkComboBox *combobox);
+static void gtk_combo_box_size_request (GtkWidget      *widget,
+					GtkRequisition *requisition);
+static void gtk_combo_box_size_allocate(GtkWidget     *widget,
+					GtkAllocation *allocation);
+static void gtk_combo_box_draw         (GtkWidget    *widget,
+					GdkRectangle *area);
+static void gtk_combo_box_draw_arrow   (GtkWidget *widget);
+static gint gtk_combo_box_expose       (GtkWidget *object,
+					GdkEventExpose *event);
+static void gtk_combo_box_destroy      (GtkObject *object);
+#if 0
+static gint gtk_combo_box_key_press    (GtkWidget   *widget,
+					GdkEventKey *event);
+#endif
+static gint gtk_combo_box_button_press (GtkWidget      *widget,
+					GdkEventButton *event);
+static void gtk_combo_box_realize      (GtkWidget      *widget);
+static void gtk_combo_box_item_activate(GtkWidget      *widget,
+					GtkComboBox    *cb);
+static void gtk_combo_box_set_down     (GtkWidget      *widget,
+					GtkComboBox    *cb);
+static void gtk_combo_box_set_up       (GtkWidget      *widget,
+					GtkComboBox    *cb);
+
+static GtkEntryClass *parent_class = NULL;
+
+guint
+gtk_combo_box_get_type ()
+{
+  static guint combo_box_type = 0;
+
+  if (!combo_box_type)
+    {
+      GtkTypeInfo combo_box_info =
+      {
+	"GtkComboBox",
+	sizeof (GtkComboBox),
+	sizeof (GtkComboBoxClass),
+	(GtkClassInitFunc) gtk_combo_box_class_init,
+	(GtkObjectInitFunc) gtk_combo_box_init,
+	(GtkArgFunc) NULL,
+      };
+
+      combo_box_type = gtk_type_unique (gtk_entry_get_type (), &combo_box_info);
+    }
+
+  return combo_box_type;
+}
+
+static void
+gtk_combo_box_class_init (GtkComboBoxClass *class)
+{
+  GtkObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+
+  object_class = (GtkObjectClass *) class;
+  widget_class = (GtkWidgetClass *) class;
+
+  parent_class = gtk_type_class (gtk_entry_get_type ());
+
+  object_class->destroy = gtk_combo_box_destroy;
+
+  widget_class->button_press_event = gtk_combo_box_button_press;
+#if 0
+  widget_class->key_press_event = gtk_combo_box_key_press;
+#endif
+  widget_class->size_request = gtk_combo_box_size_request;
+  widget_class->size_allocate = gtk_combo_box_size_allocate;
+  widget_class->draw = gtk_combo_box_draw;
+  widget_class->expose_event = gtk_combo_box_expose;
+  widget_class->realize = gtk_combo_box_realize;
+
+}
+
+static void
+gtk_combo_box_init (GtkComboBox *combobox)
+{
+  GTK_WIDGET_SET_FLAGS (combobox, GTK_CAN_FOCUS);
+
+  combobox->popdown = NULL;
+  combobox->menu_is_down = FALSE;
+}
+
+GtkWidget*
+gtk_combo_box_new (GList *popdown_strings)
+{
+  GtkWidget *retval = GTK_WIDGET (gtk_type_new (gtk_combo_box_get_type ()));
+  if(popdown_strings)
+    gtk_combo_box_set_popdown_strings(GTK_COMBO_BOX(retval), popdown_strings);
+  return retval;
+}
+
+GtkWidget*
+gtk_combo_box_new_with_max_length (GList *popdown_strings,
+				   guint16 max)
+{
+  GtkWidget *retval;
+  retval = GTK_WIDGET(gtk_type_new (gtk_combo_box_get_type ()));
+  GTK_ENTRY(retval)->text_max_length = max;
+  if(popdown_strings)
+    gtk_combo_box_set_popdown_strings(GTK_COMBO_BOX(retval), popdown_strings);
+  return retval;
+}
+
+void
+gtk_combo_box_set_popdown_strings(GtkComboBox *combobox,
+				  GList *popdown_strings)
+{
+  GList *t;
+
+  g_return_if_fail(combobox != NULL);
+  g_return_if_fail(popdown_strings != NULL);
+  if(combobox->popdown)
+    gtk_widget_destroy(combobox->popdown);
+
+  combobox->popdown = gtk_menu_new();
+  gtk_signal_connect(GTK_OBJECT(combobox->popdown),
+		     "show",
+		     GTK_SIGNAL_FUNC(gtk_combo_box_set_down),
+		     combobox);
+  gtk_signal_connect(GTK_OBJECT(combobox->popdown),
+		     "hide",
+		     GTK_SIGNAL_FUNC(gtk_combo_box_set_up),
+		     combobox);
+
+  for(t = popdown_strings; t; t = t->next)
+    {
+      GtkWidget *mitem;
+      mitem = gtk_menu_item_new_with_label(t->data);
+      gtk_widget_show(mitem);
+      gtk_menu_append(GTK_MENU(combobox->popdown), mitem);
+      gtk_signal_connect(GTK_OBJECT(mitem), "activate",
+			 GTK_SIGNAL_FUNC(gtk_combo_box_item_activate),
+			 combobox);
+    }
+
+  if(GTK_WIDGET_REALIZED(combobox))
+    gtk_widget_set_usize(combobox->popdown,
+			 GTK_WIDGET(combobox)->requisition.width,
+			 -1);
+}
+
+static void
+gtk_combo_box_realize(GtkWidget *widget)
+{
+  GtkComboBox *cb;
+
+  g_return_if_fail(widget != NULL);
+  g_return_if_fail(GTK_IS_COMBO_BOX(widget));
+
+  cb = GTK_COMBO_BOX(widget);
+  GTK_WIDGET_CLASS(parent_class)->realize(widget);
+  gdk_window_set_background (GTK_WIDGET(widget)->window,
+			     &widget->style->bg[GTK_WIDGET_STATE(widget)]);
+
+  if(cb->popdown)
+    {
+      gtk_widget_set_usize(cb->popdown,
+			   widget->requisition.width,
+			   -1);
+    }
+}
+
+static void
+gtk_combo_box_size_request (GtkWidget      *widget,
+			    GtkRequisition *requisition)
+{
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_COMBO_BOX (widget));
+  g_return_if_fail (requisition != NULL);
+
+  GTK_WIDGET_CLASS(parent_class)->size_request(widget, requisition);
+
+  requisition->width += ARROW_SIZE_X;
+  if(requisition->height < ARROW_SIZE_Y)
+    requisition->height = ARROW_SIZE_Y;
+}
+
+static void
+gtk_combo_box_size_allocate (GtkWidget     *widget,
+			     GtkAllocation *allocation)
+{
+  GtkComboBox *cb;
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_COMBO_BOX (widget));
+  g_return_if_fail (allocation != NULL);
+
+  cb = GTK_COMBO_BOX(widget);
+
+  widget->allocation = *allocation;
+
+  GTK_WIDGET_CLASS(parent_class)->size_allocate(widget, allocation);
+#define INNER_BORDER 2
+  gdk_window_resize(GTK_ENTRY(widget)->text_area,
+		    allocation->width - (widget->style->klass->xthickness + INNER_BORDER) * 2 - ARROW_SIZE_X,
+		    widget->requisition.height - (widget->style->klass->ythickness + INNER_BORDER) * 2);
+}
+
+static void
+gtk_combo_box_draw_arrow   (GtkWidget *widget)
+{
+  gint sx, sy;
+
+  sx = widget->allocation.width - ARROW_SIZE_X;
+  sy = ARROW_PADDING;
+  widget->style->klass->draw_arrow(widget->style,
+				   widget->window,
+				   GTK_WIDGET_STATE(widget),
+				   GTK_SHADOW_OUT,
+				   GTK_ARROW_DOWN, TRUE,
+				   sx, sy,
+				   ARROW_SIZE_X - ARROW_PADDING,
+				   ARROW_SIZE_Y - ARROW_PADDING - 2);
+}
+
+static void
+gtk_combo_box_draw (GtkWidget    *widget,
+		    GdkRectangle *area)
+{
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_COMBO_BOX (widget));
+  g_return_if_fail (area != NULL);
+
+  if (GTK_WIDGET_DRAWABLE (widget))
+    {
+      gtk_combo_box_draw_arrow(widget);
+      GTK_WIDGET_CLASS(parent_class)->draw(widget, area);
+    }
+}
+
+static gint
+gtk_combo_box_expose (GtkWidget      *widget,
+		      GdkEventExpose *event)
+{
+  gint retval;
+  g_return_val_if_fail (widget != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE);
+  g_return_val_if_fail (event != NULL, FALSE);
+
+  gtk_combo_box_draw_arrow(widget);
+  retval = GTK_WIDGET_CLASS(parent_class)->expose_event(widget, event);
+  return retval;
+}
+
+static void
+gtk_combo_box_position_menu(GtkMenu  *menu,
+			    gint     *x,
+			    gint     *y,
+			    gpointer  user_data)
+{
+  GtkComboBox *cb;
+  GtkWidget *widget;
+  gint rootw, rooth, wy;
+
+  g_return_if_fail(user_data != NULL);
+  g_return_if_fail(GTK_IS_COMBO_BOX(user_data));
+
+  cb = GTK_COMBO_BOX(user_data);
+  widget = GTK_WIDGET(user_data);
+
+  gdk_window_get_origin(widget->window, x, &wy);
+  *y = wy + widget->allocation.height;
+
+  gdk_window_get_size(GDK_ROOT_PARENT(), &rootw, &rooth);
+
+  /* This check isn't perfect - what if the menu is too big to fit on
+     the screen going either up or down? *sigh* not a perfect
+     world, I guess */
+  if((*y + GTK_WIDGET(menu)->requisition.height) > rooth)
+    *y = wy - GTK_WIDGET(menu)->requisition.height;
+}
+
+static void
+gtk_combo_box_set_down (GtkWidget *widget,
+			GtkComboBox *cb)
+{
+  g_return_if_fail(GTK_IS_COMBO_BOX(cb));
+
+  cb->menu_is_down = TRUE;
+}
+
+static void
+gtk_combo_box_set_up (GtkWidget *widget,
+		      GtkComboBox *cb)
+{
+  g_return_if_fail(GTK_IS_COMBO_BOX(cb));
+
+  cb->menu_is_down = FALSE;
+}
+
+static gint
+gtk_combo_box_button_press (GtkWidget      *widget,
+			    GdkEventButton *event)
+{
+  GtkComboBox *cb;
+  g_return_val_if_fail (widget != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE);
+  g_return_val_if_fail (event != NULL, FALSE);
+
+  cb = GTK_COMBO_BOX(widget);
+
+  if(event->window == widget->window
+     && event->x > (widget->allocation.width - ARROW_SIZE_X)
+     && event->x < widget->allocation.width
+     && event->button == 1)
+    {
+      gtk_menu_popup(GTK_MENU(cb->popdown),
+		     NULL, NULL,
+		     gtk_combo_box_position_menu,
+		     cb, event->button,
+		     event->time);
+      return TRUE;
+    }
+  else
+    return GTK_WIDGET_CLASS(parent_class)->button_press_event(widget, event);
+}
+
+#if 0
+static gint
+gtk_combo_box_key_press (GtkWidget   *widget,
+			 GdkEventKey *event)
+{
+
+  g_return_val_if_fail (widget != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_ENTRY (widget), FALSE);
+  g_return_val_if_fail (event != NULL, FALSE);
+
+  return GTK_WIDGET_CLASS(parent_class)->key_press_event(widget, event);
+}
+#endif
+
+static void
+gtk_combo_box_destroy(GtkObject *object)
+{
+  GtkComboBox *cb;
+  g_return_if_fail(GTK_IS_COMBO_BOX(object));
+
+  cb = GTK_COMBO_BOX(object);
+  if(cb->popdown)
+    gtk_widget_destroy(cb->popdown);
+
+  GTK_OBJECT_CLASS(parent_class)->destroy(object);
+}
+
+static void gtk_combo_box_item_activate(GtkWidget *widget,
+					GtkComboBox *cb)
+{
+  char *newtext = GTK_LABEL(GTK_BIN(widget)->child)->label;
+
+  gtk_entry_set_text(GTK_ENTRY(cb), newtext);
+}