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601 | /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Croma 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#define _GNU_SOURCE
#define _XOPEN_SOURCE 600 /* for the maths routines over floats */
#include <math.h>
#include <ctk/ctk.h>
#include "preview-widget.h"
static void meta_preview_class_init (MetaPreviewClass *klass);
static void meta_preview_init (MetaPreview *preview);
static void meta_preview_get_preferred_width(CtkWidget *widget,
gint *minimal, gint *natural);
static void meta_preview_get_preferred_height(CtkWidget *widget,
gint *minimal, gint *natural);
static void meta_preview_size_allocate (CtkWidget *widget,
CtkAllocation *allocation);
static gboolean meta_preview_draw (CtkWidget *widget,
cairo_t *cr);
static void meta_preview_finalize (GObject *object);
#define NO_CHILD_WIDTH 80
#define NO_CHILD_HEIGHT 20
G_DEFINE_TYPE (MetaPreview, meta_preview, CTK_TYPE_BIN);
static void
meta_preview_class_init (MetaPreviewClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
CtkWidgetClass *widget_class;
widget_class = (CtkWidgetClass*) class;
meta_preview_parent_class = g_type_class_peek (CTK_TYPE_BIN);
gobject_class->finalize = meta_preview_finalize;
widget_class->draw = meta_preview_draw;
widget_class->get_preferred_width = meta_preview_get_preferred_width;
widget_class->get_preferred_height = meta_preview_get_preferred_height;
ctk_container_class_handle_border_width (CTK_CONTAINER_CLASS (class));
widget_class->size_allocate = meta_preview_size_allocate;
}
static void
meta_preview_init (MetaPreview *preview)
{
int i;
ctk_widget_set_has_window (CTK_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->borders_cached = FALSE;
}
CtkWidget*
meta_preview_new (void)
{
MetaPreview *preview;
preview = g_object_new (META_TYPE_PREVIEW, NULL);
return CTK_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 (meta_preview_parent_class)->finalize (object);
}
static void
ensure_info (MetaPreview *preview)
{
CtkWidget *widget;
widget = CTK_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 = ctk_widget_create_pango_layout (widget,
preview->title);
font_desc = meta_ctk_widget_get_font_desc (widget, scale, NULL);
preview->text_height =
meta_pango_font_desc_get_text_height (font_desc,
ctk_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->borders_cached)
{
if (preview->theme)
meta_theme_get_frame_borders (preview->theme,
preview->type,
preview->text_height,
preview->flags,
&preview->borders);
else
meta_frame_borders_clear (&preview->borders);
preview->borders_cached = TRUE;
}
}
static gboolean
meta_preview_draw (CtkWidget *widget,
cairo_t *cr)
{
MetaPreview *preview;
CtkAllocation allocation;
int border_width;
int client_width;
int client_height;
g_return_val_if_fail (META_IS_PREVIEW (widget), FALSE);
preview = META_PREVIEW (widget);
ensure_info (preview);
cairo_save (cr);
border_width = ctk_container_get_border_width (CTK_CONTAINER (widget));
ctk_widget_get_allocation (widget, &allocation);
client_width = allocation.width - preview->borders.total.left - preview->borders.total.right - border_width * 2;
client_height = allocation.height - preview->borders.total.top - preview->borders.total.bottom - border_width * 2;
if (client_width < 0)
client_width = 1;
if (client_height < 0)
client_height = 1;
if (preview->theme)
{
MetaButtonState button_states[META_BUTTON_TYPE_LAST] =
{
META_BUTTON_STATE_NORMAL,
META_BUTTON_STATE_NORMAL,
META_BUTTON_STATE_NORMAL,
META_BUTTON_STATE_NORMAL
};
meta_theme_draw_frame (preview->theme,
ctk_widget_get_style_context (widget),
cr,
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 ());
}
cairo_restore (cr);
/* draw child */
return CTK_WIDGET_CLASS (meta_preview_parent_class)->draw (widget, cr);
}
static void
meta_preview_get_preferred_width (CtkWidget *widget,
gint *minimum,
gint *natural)
{
MetaPreview *preview;
int border_width;
CtkWidget *child;
preview = META_PREVIEW (widget);
ensure_info (preview);
*minimum = *natural = preview->borders.total.left + preview->borders.total.right;
child = ctk_bin_get_child (CTK_BIN (preview));
if (child && ctk_widget_get_visible (child))
{
gint child_min, child_nat;
ctk_widget_get_preferred_width (child, &child_min, &child_nat);
*minimum += child_min;
*natural += child_nat;
}
else
{
*minimum += NO_CHILD_WIDTH;
*natural += NO_CHILD_WIDTH;
}
border_width = ctk_container_get_border_width (CTK_CONTAINER (widget));
*minimum += border_width * 2;
*natural += border_width * 2;
}
static void
meta_preview_get_preferred_height (CtkWidget *widget,
gint *minimum,
gint *natural)
{
MetaPreview *preview;
int border_width;
CtkWidget *child;
preview = META_PREVIEW (widget);
ensure_info (preview);
*minimum = *natural = preview->borders.total.top + preview->borders.total.bottom;
child = ctk_bin_get_child (CTK_BIN (preview));
if (child && ctk_widget_get_visible (child))
{
gint child_min, child_nat;
ctk_widget_get_preferred_height (child, &child_min, &child_nat);
*minimum += child_min;
*natural += child_nat;
}
else
{
*minimum += NO_CHILD_HEIGHT;
*natural += NO_CHILD_HEIGHT;
}
border_width = ctk_container_get_border_width (CTK_CONTAINER (widget));
*minimum += border_width * 2;
*natural += border_width * 2;
}
static void
meta_preview_size_allocate (CtkWidget *widget,
CtkAllocation *allocation)
{
MetaPreview *preview;
int border_width;
CtkAllocation widget_allocation, child_allocation;
CtkWidget *child;
preview = META_PREVIEW (widget);
ensure_info (preview);
ctk_widget_set_allocation (widget, allocation);
border_width = ctk_container_get_border_width (CTK_CONTAINER (widget));
child = ctk_bin_get_child (CTK_BIN (widget));
if (child &&
ctk_widget_get_visible (child))
{
ctk_widget_get_allocation (widget, &widget_allocation);
child_allocation.x = widget_allocation.x + border_width + preview->borders.total.left;
child_allocation.y = widget_allocation.y + border_width + preview->borders.total.top;
child_allocation.width = MAX (1, widget_allocation.width - border_width * 2 - preview->borders.total.left - preview->borders.total.right);
child_allocation.height = MAX (1, widget_allocation.height - border_width * 2 - preview->borders.total.top - preview->borders.total.bottom);
ctk_widget_size_allocate (ctk_bin_get_child (CTK_BIN (widget)), &child_allocation);
}
}
static void
clear_cache (MetaPreview *preview)
{
if (preview->layout)
{
g_object_unref (G_OBJECT (preview->layout));
preview->layout = NULL;
}
preview->borders_cached = FALSE;
}
void
meta_preview_set_theme (MetaPreview *preview,
MetaTheme *theme)
{
g_return_if_fail (META_IS_PREVIEW (preview));
preview->theme = theme;
clear_cache (preview);
ctk_widget_queue_resize (CTK_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);
ctk_widget_queue_resize (CTK_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);
ctk_widget_queue_resize (CTK_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);
ctk_widget_queue_resize (CTK_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;
ctk_widget_queue_draw (CTK_WIDGET (preview));
}
GdkPixbuf*
meta_preview_get_icon (void)
{
static GdkPixbuf *default_icon = NULL;
if (default_icon == NULL)
{
CtkIconTheme *theme;
gboolean icon_exists;
theme = ctk_icon_theme_get_default ();
icon_exists = ctk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME);
if (icon_exists)
default_icon = ctk_icon_theme_load_icon (theme,
META_DEFAULT_ICON_NAME,
META_DEFAULT_ICON_SIZE,
0,
NULL);
else
default_icon = ctk_icon_theme_load_icon (theme,
"image-missing",
META_DEFAULT_ICON_SIZE,
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)
{
CtkIconTheme *theme;
gboolean icon_exists;
theme = ctk_icon_theme_get_default ();
icon_exists = ctk_icon_theme_has_icon (theme, META_DEFAULT_ICON_NAME);
if (icon_exists)
default_icon = ctk_icon_theme_load_icon (theme,
META_DEFAULT_ICON_NAME,
META_MINI_ICON_WIDTH,
0,
NULL);
else
default_icon = ctk_icon_theme_load_icon (theme,
"image-missing",
META_MINI_ICON_WIDTH,
0,
NULL);
g_assert (default_icon);
}
return default_icon;
}
cairo_region_t *
meta_preview_get_clip_region (MetaPreview *preview, gint new_window_width, gint new_window_height)
{
CdkRectangle xrect;
cairo_region_t *corners_xregion, *window_xregion;
gint flags;
MetaFrameLayout *fgeom;<--- Variable 'fgeom' can be declared as pointer to const
MetaFrameStyle *frame_style;
g_return_val_if_fail (META_IS_PREVIEW (preview), NULL);
flags = (META_PREVIEW (preview)->flags);
window_xregion = cairo_region_create ();
xrect.x = 0;
xrect.y = 0;
xrect.width = new_window_width;
xrect.height = new_window_height;
cairo_region_union_rectangle (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 = cairo_region_create ();
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;
cairo_region_union_rectangle (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;
cairo_region_union_rectangle (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;
cairo_region_union_rectangle (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;
cairo_region_union_rectangle (corners_xregion, &xrect);
}
}
cairo_region_subtract (window_xregion, corners_xregion);
cairo_region_destroy (corners_xregion);
return window_xregion;
}
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