diff options
Diffstat (limited to 'src/ui/preview-widget.c')
| -rw-r--r-- | src/ui/preview-widget.c | 601 |
1 files changed, 601 insertions, 0 deletions
diff --git a/src/ui/preview-widget.c b/src/ui/preview-widget.c new file mode 100644 index 00000000..8fcd2517 --- /dev/null +++ b/src/ui/preview-widget.c @@ -0,0 +1,601 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ + +/* Marco theme preview widget */ + +/* + * Copyright (C) 2002 Havoc Pennington + * + * 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., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#define _GNU_SOURCE +#define _XOPEN_SOURCE 600 /* for the maths routines over floats */ + +#include <math.h> +#include <gtk/gtk.h> +#include "preview-widget.h" + +static void meta_preview_class_init (MetaPreviewClass *klass); +static void meta_preview_init (MetaPreview *preview); +static void meta_preview_size_request (GtkWidget *widget, + GtkRequisition *req); +static void meta_preview_size_allocate (GtkWidget *widget, + GtkAllocation *allocation); +static gboolean meta_preview_expose (GtkWidget *widget, + GdkEventExpose *event); +static void meta_preview_finalize (GObject *object); + +static GtkWidgetClass *parent_class; + +GType +meta_preview_get_type (void) +{ + static GType preview_type = 0; + + if (!preview_type) + { + static const GtkTypeInfo preview_info = + { + "MetaPreview", + sizeof (MetaPreview), + sizeof (MetaPreviewClass), + (GtkClassInitFunc) meta_preview_class_init, + (GtkObjectInitFunc) meta_preview_init, + /* reserved_1 */ NULL, + /* reserved_2 */ NULL, + (GtkClassInitFunc) NULL, + }; + + preview_type = gtk_type_unique (GTK_TYPE_BIN, &preview_info); + } + + return preview_type; +} + +static void +meta_preview_class_init (MetaPreviewClass *class) +{ + GObjectClass *gobject_class = G_OBJECT_CLASS (class); + GtkWidgetClass *widget_class; + + widget_class = (GtkWidgetClass*) class; + parent_class = g_type_class_peek (GTK_TYPE_BIN); + + gobject_class->finalize = meta_preview_finalize; + + widget_class->expose_event = meta_preview_expose; + widget_class->size_request = meta_preview_size_request; + widget_class->size_allocate = meta_preview_size_allocate; +} + +static void +meta_preview_init (MetaPreview *preview) +{ + int i; + + gtk_widget_set_has_window (GTK_WIDGET (preview), FALSE); + + i = 0; + while (i < MAX_BUTTONS_PER_CORNER) + { + preview->button_layout.left_buttons[i] = META_BUTTON_FUNCTION_LAST; + preview->button_layout.right_buttons[i] = META_BUTTON_FUNCTION_LAST; + ++i; + } + + preview->button_layout.left_buttons[0] = META_BUTTON_FUNCTION_MENU; + + preview->button_layout.right_buttons[0] = META_BUTTON_FUNCTION_MINIMIZE; + preview->button_layout.right_buttons[1] = META_BUTTON_FUNCTION_MAXIMIZE; + preview->button_layout.right_buttons[2] = META_BUTTON_FUNCTION_CLOSE; + + preview->type = META_FRAME_TYPE_NORMAL; + preview->flags = + META_FRAME_ALLOWS_DELETE | + META_FRAME_ALLOWS_MENU | + META_FRAME_ALLOWS_MINIMIZE | + META_FRAME_ALLOWS_MAXIMIZE | + META_FRAME_ALLOWS_VERTICAL_RESIZE | + META_FRAME_ALLOWS_HORIZONTAL_RESIZE | + META_FRAME_HAS_FOCUS | + META_FRAME_ALLOWS_SHADE | + META_FRAME_ALLOWS_MOVE; + + preview->left_width = -1; + preview->right_width = -1; + preview->top_height = -1; + preview->bottom_height = -1; +} + +GtkWidget* +meta_preview_new (void) +{ + MetaPreview *preview; + + preview = gtk_type_new (META_TYPE_PREVIEW); + + return GTK_WIDGET (preview); +} + +static void +meta_preview_finalize (GObject *object) +{ + MetaPreview *preview; + + preview = META_PREVIEW (object); + + g_free (preview->title); + preview->title = NULL; + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +ensure_info (MetaPreview *preview) +{ + GtkWidget *widget; + + widget = GTK_WIDGET (preview); + + if (preview->layout == NULL) + { + PangoFontDescription *font_desc; + double scale; + PangoAttrList *attrs; + PangoAttribute *attr; + + if (preview->theme) + scale = meta_theme_get_title_scale (preview->theme, + preview->type, + preview->flags); + else + scale = 1.0; + + preview->layout = gtk_widget_create_pango_layout (widget, + preview->title); + + font_desc = meta_gtk_widget_get_font_desc (widget, scale, NULL); + + preview->text_height = + meta_pango_font_desc_get_text_height (font_desc, + gtk_widget_get_pango_context (widget)); + + attrs = pango_attr_list_new (); + + attr = pango_attr_size_new (pango_font_description_get_size (font_desc)); + attr->start_index = 0; + attr->end_index = G_MAXINT; + + pango_attr_list_insert (attrs, attr); + + pango_layout_set_attributes (preview->layout, attrs); + + pango_attr_list_unref (attrs); + + pango_font_description_free (font_desc); + } + + if (preview->top_height < 0) + { + if (preview->theme) + { + meta_theme_get_frame_borders (preview->theme, + preview->type, + preview->text_height, + preview->flags, + &preview->top_height, + &preview->bottom_height, + &preview->left_width, + &preview->right_width); + } + else + { + preview->top_height = 0; + preview->bottom_height = 0; + preview->left_width = 0; + preview->right_width = 0; + } + } +} + +static gboolean +meta_preview_expose (GtkWidget *widget, + GdkEventExpose *event) +{ + MetaPreview *preview; + GtkAllocation allocation; + int border_width; + int client_width; + int client_height; + MetaButtonState button_states[META_BUTTON_TYPE_LAST] = + { + META_BUTTON_STATE_NORMAL, + META_BUTTON_STATE_NORMAL, + META_BUTTON_STATE_NORMAL, + META_BUTTON_STATE_NORMAL + }; + + g_return_val_if_fail (META_IS_PREVIEW (widget), FALSE); + g_return_val_if_fail (event != NULL, FALSE); + + preview = META_PREVIEW (widget); + + ensure_info (preview); + + border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); + + gtk_widget_get_allocation (widget, &allocation); + client_width = allocation.width - preview->left_width - preview->right_width - border_width * 2; + client_height = allocation.height - preview->top_height - preview->bottom_height - border_width * 2; + + if (client_width < 0) + client_width = 1; + if (client_height < 0) + client_height = 1; + + if (preview->theme) + { + border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); + + meta_theme_draw_frame (preview->theme, + widget, + gtk_widget_get_window (widget), + &event->area, + allocation.x + border_width, + allocation.y + border_width, + preview->type, + preview->flags, + client_width, client_height, + preview->layout, + preview->text_height, + &preview->button_layout, + button_states, + meta_preview_get_mini_icon (), + meta_preview_get_icon ()); + } + + /* draw child */ + return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event); +} + +static void +meta_preview_size_request (GtkWidget *widget, + GtkRequisition *req) +{ + MetaPreview *preview; + GtkWidget *child; + guint border_width; + + preview = META_PREVIEW (widget); + + ensure_info (preview); + + req->width = preview->left_width + preview->right_width; + req->height = preview->top_height + preview->bottom_height; + + child = gtk_bin_get_child (GTK_BIN (preview)); + if (child && + gtk_widget_get_visible (child)) + { + GtkRequisition child_requisition; + + gtk_widget_size_request (child, &child_requisition); + + req->width += child_requisition.width; + req->height += child_requisition.height; + } + else + { +#define NO_CHILD_WIDTH 80 +#define NO_CHILD_HEIGHT 20 + req->width += NO_CHILD_WIDTH; + req->height += NO_CHILD_HEIGHT; + } + + border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); + req->width += border_width * 2; + req->height += border_width * 2; +} + +static void +meta_preview_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + MetaPreview *preview; + int border_width; + GtkAllocation child_allocation; + GtkWidget *child; + + preview = META_PREVIEW (widget); + + ensure_info (preview); + + widget->allocation = *allocation; + + border_width = gtk_container_get_border_width (GTK_CONTAINER (widget)); + + child = gtk_bin_get_child (GTK_BIN (widget)); + if (child && + gtk_widget_get_visible (child)) + { + child_allocation.x = widget->allocation.x + border_width + preview->left_width; + child_allocation.y = widget->allocation.y + border_width + preview->top_height; + + child_allocation.width = MAX (1, widget->allocation.width - border_width * 2 - preview->left_width - preview->right_width); + child_allocation.height = MAX (1, widget->allocation.height - border_width * 2 - preview->top_height - preview->bottom_height); + + gtk_widget_size_allocate (gtk_bin_get_child (GTK_BIN (widget)), &child_allocation); + } +} + +static void +clear_cache (MetaPreview *preview) +{ + if (preview->layout) + { + g_object_unref (G_OBJECT (preview->layout)); + preview->layout = NULL; + } + + preview->left_width = -1; + preview->right_width = -1; + preview->top_height = -1; + preview->bottom_height = -1; +} + +void +meta_preview_set_theme (MetaPreview *preview, + MetaTheme *theme) +{ + g_return_if_fail (META_IS_PREVIEW (preview)); + + preview->theme = theme; + + clear_cache (preview); + + gtk_widget_queue_resize (GTK_WIDGET (preview)); +} + +void +meta_preview_set_title (MetaPreview *preview, + const char *title) +{ + g_return_if_fail (META_IS_PREVIEW (preview)); + + g_free (preview->title); + preview->title = g_strdup (title); + + clear_cache (preview); + + gtk_widget_queue_resize (GTK_WIDGET (preview)); +} + +void +meta_preview_set_frame_type (MetaPreview *preview, + MetaFrameType type) +{ + g_return_if_fail (META_IS_PREVIEW (preview)); + + preview->type = type; + + clear_cache (preview); + + gtk_widget_queue_resize (GTK_WIDGET (preview)); +} + +void +meta_preview_set_frame_flags (MetaPreview *preview, + MetaFrameFlags flags) +{ + g_return_if_fail (META_IS_PREVIEW (preview)); + + preview->flags = flags; + + clear_cache (preview); + + gtk_widget_queue_resize (GTK_WIDGET (preview)); +} + +void +meta_preview_set_button_layout (MetaPreview *preview, + const MetaButtonLayout *button_layout) +{ + g_return_if_fail (META_IS_PREVIEW (preview)); + + preview->button_layout = *button_layout; + + gtk_widget_queue_draw (GTK_WIDGET (preview)); +} + +GdkPixbuf* +meta_preview_get_icon (void) +{ + static GdkPixbuf *default_icon = NULL; + + if (default_icon == NULL) + { + GtkIconTheme *theme; + gboolean icon_exists; + + theme = gtk_icon_theme_get_default (); + + icon_exists = gtk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME); + + if (icon_exists) + default_icon = gtk_icon_theme_load_icon (theme, + META_DEFAULT_ICON_NAME, + META_ICON_WIDTH, + 0, + NULL); + else + default_icon = gtk_icon_theme_load_icon (theme, + "gtk-missing-image", + META_ICON_WIDTH, + 0, + NULL); + + g_assert (default_icon); + } + + return default_icon; +} + +GdkPixbuf* +meta_preview_get_mini_icon (void) +{ + static GdkPixbuf *default_icon = NULL; + + if (default_icon == NULL) + { + GtkIconTheme *theme; + gboolean icon_exists; + + theme = gtk_icon_theme_get_default (); + + icon_exists = gtk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME); + + if (icon_exists) + default_icon = gtk_icon_theme_load_icon (theme, + META_DEFAULT_ICON_NAME, + META_MINI_ICON_WIDTH, + 0, + NULL); + else + default_icon = gtk_icon_theme_load_icon (theme, + "gtk-missing-image", + META_MINI_ICON_WIDTH, + 0, + NULL); + + g_assert (default_icon); + } + + return default_icon; +} + +GdkRegion * +meta_preview_get_clip_region (MetaPreview *preview, gint new_window_width, gint new_window_height) +{ + GdkRectangle xrect; + GdkRegion *corners_xregion, *window_xregion; + gint flags; + MetaFrameLayout *fgeom; + MetaFrameStyle *frame_style; + + g_return_val_if_fail (META_IS_PREVIEW (preview), NULL); + + flags = (META_PREVIEW (preview)->flags); + + window_xregion = gdk_region_new (); + + xrect.x = 0; + xrect.y = 0; + xrect.width = new_window_width; + xrect.height = new_window_height; + + gdk_region_union_with_rect (window_xregion, &xrect); + + if (preview->theme == NULL) + return window_xregion; + + /* Otherwise, we do have a theme, so calculate the corners */ + frame_style = meta_theme_get_frame_style (preview->theme, + META_FRAME_TYPE_NORMAL, flags); + + fgeom = frame_style->layout; + + corners_xregion = gdk_region_new (); + + if (fgeom->top_left_corner_rounded_radius != 0) + { + const int corner = fgeom->top_left_corner_rounded_radius; + const float radius = sqrt(corner) + corner; + int i; + + for (i=0; i<corner; i++) + { + + const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5)))); + xrect.x = 0; + xrect.y = i; + xrect.width = width; + xrect.height = 1; + + gdk_region_union_with_rect (corners_xregion, &xrect); + } + } + + if (fgeom->top_right_corner_rounded_radius != 0) + { + const int corner = fgeom->top_right_corner_rounded_radius; + const float radius = sqrt(corner) + corner; + int i; + + for (i=0; i<corner; i++) + { + const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5)))); + xrect.x = new_window_width - width; + xrect.y = i; + xrect.width = width; + xrect.height = 1; + + gdk_region_union_with_rect (corners_xregion, &xrect); + } + } + + if (fgeom->bottom_left_corner_rounded_radius != 0) + { + const int corner = fgeom->bottom_left_corner_rounded_radius; + const float radius = sqrt(corner) + corner; + int i; + + for (i=0; i<corner; i++) + { + const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5)))); + xrect.x = 0; + xrect.y = new_window_height - i - 1; + xrect.width = width; + xrect.height = 1; + + gdk_region_union_with_rect (corners_xregion, &xrect); + } + } + + if (fgeom->bottom_right_corner_rounded_radius != 0) + { + const int corner = fgeom->bottom_right_corner_rounded_radius; + const float radius = sqrt(corner) + corner; + int i; + + for (i=0; i<corner; i++) + { + const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5)))); + xrect.x = new_window_width - width; + xrect.y = new_window_height - i - 1; + xrect.width = width; + xrect.height = 1; + + gdk_region_union_with_rect (corners_xregion, &xrect); + } + } + + gdk_region_subtract (window_xregion, corners_xregion); + gdk_region_destroy (corners_xregion); + + return window_xregion; +} + + |