diff options
Diffstat (limited to 'eazel-engine/src/eazel-theme-hacks.c')
| -rw-r--r-- | eazel-engine/src/eazel-theme-hacks.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/eazel-engine/src/eazel-theme-hacks.c b/eazel-engine/src/eazel-theme-hacks.c new file mode 100644 index 0000000..e045a09 --- /dev/null +++ b/eazel-engine/src/eazel-theme-hacks.c @@ -0,0 +1,143 @@ +/* eazel-theme-hacks.c -- override GtkWidgetClass methods + + Copyright (C) 1998 Randy Gordon, Integrand Systems + Copyright (C) 2000 Eazel, Inc. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + This program 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 + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id: eazel-theme-hacks.c,v 1.4 2001/01/18 01:20:04 jsh Exp $ + + Authors: Randy Gordon <randy@integrand.com> + John Harper <jsh@eazel.com> */ + +#include "eazel-theme.h" + +/* GTK+ sucks in places. This file contains dubious kludges to + force it to do what we want. */ + + +/* GtkRange code */ + +static gint +gtk_range_expose (GtkWidget *widget, + GdkEventExpose *event) +{ + GtkRange *range; + + /* The version of this method in gtkrange.c doesn't work + * when the slider is as wide as the trough. + */ + g_return_val_if_fail (widget != NULL, FALSE); + g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE); + g_return_val_if_fail (event != NULL, FALSE); + + range = GTK_RANGE (widget); + + if (event->window == range->trough) + { + gtk_range_draw_trough (range); + } + else if (event->window == widget->window) + { + gtk_range_draw_background (range); + } + else if (event->window == range->slider) + { + gtk_range_draw_slider (range); + } + else if (event->window == range->step_forw) + { + gtk_range_draw_step_forw (range); + } + else if (event->window == range->step_back) + { + gtk_range_draw_step_back (range); + } + return FALSE; +} + + +/* GtkWidgetClass method-override framework */ + +typedef struct { + GtkType (*get_type) (void); + int offset; + gpointer replacement; + gpointer original; +} eazel_engine_class_hack; + +static eazel_engine_class_hack class_hacks[] = { + + { gtk_range_get_type, + G_STRUCT_OFFSET (GtkWidgetClass, expose_event), + gtk_range_expose }, + + { gtk_scale_get_type, + G_STRUCT_OFFSET (GtkWidgetClass, expose_event), + gtk_range_expose }, + + { NULL } +}; + +void +eazel_engine_install_hacks (void) +{ + eazel_engine_class_hack *hack; + for (hack = class_hacks; hack->get_type != 0; hack++) + { + GtkWidgetClass *klass = gtk_type_class (hack->get_type ()); + hack->original = G_STRUCT_MEMBER (gpointer, klass, hack->offset); + G_STRUCT_MEMBER (gpointer, klass, hack->offset) = hack->replacement; + } +} + +static void +restore_funcs (GtkObjectClass *klass, + int member_offset, + gpointer find_func, + gpointer replace_func) +{ + GList *child_list, *child; + if (!GTK_IS_WIDGET_CLASS (klass)) + g_error ("Warning: restoring methods for non-widget"); + else + { + GtkWidgetClass *widget_klass = GTK_WIDGET_CLASS (klass); + if (G_STRUCT_MEMBER (gpointer, widget_klass, member_offset) == find_func) + G_STRUCT_MEMBER (gpointer, widget_klass, member_offset) = replace_func; + } + child_list = gtk_type_children_types (klass->type); + for (child = child_list; child; child = child->next) + { + gpointer child_class = gtk_type_class (GPOINTER_TO_UINT (child->data)); + restore_funcs (GTK_OBJECT_CLASS (child_class), + member_offset, find_func, replace_func); + } +} + +void +eazel_engine_remove_hacks (void) +{ + eazel_engine_class_hack *hack; + for (hack = class_hacks; hack->get_type != 0; hack++) + { + /* This is nasty: the methods we installed in init() may have + been copied into subclasses. */ + + GtkWidgetClass *klass = gtk_type_class (hack->get_type ()); + restore_funcs (GTK_OBJECT_CLASS (klass), hack->offset, + hack->replacement, hack->original); + } +} |