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Learning_GTK4_tree/gtk/deprecated/gtkrender.c

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2023-12-12 11:36:42 +01:00
/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkrender.h"
#include <math.h>
#include "gtkcsscornervalueprivate.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcssshadowvalueprivate.h"
#include "gtkcsstransformvalueprivate.h"
#include "gtkrendericonprivate.h"
#include "gtkrenderborderprivate.h"
#include "gtkrenderbackgroundprivate.h"
#include "gtkrenderlayoutprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtksettings.h"
#include "gsk/gskroundedrectprivate.h"
#include <gdk/gdktextureprivate.h>
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static void
gtk_do_render_icon (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
snapshot = gtk_snapshot_new ();
gtk_css_style_snapshot_icon (gtk_style_context_lookup_style (context), snapshot, width, height);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
cairo_translate (cr, x, y);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**
* gtk_render_check:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a checkmark (as in a `GtkCheckButton`).
*
* The %GTK_STATE_FLAG_CHECKED state determines whether the check is
* on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it
* should be marked as undefined.
*
* Typical checkmark rendering:
*
* ![](checks.png)
*
* Deprecated: 4.10
**/
void
gtk_render_check (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_do_render_icon (context, cr, x, y, width, height);
}
/**
* gtk_render_option:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an option mark (as in a radio button), the %GTK_STATE_FLAG_CHECKED
* state will determine whether the option is on or off, and
* %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined.
*
* Typical option mark rendering:
*
* ![](options.png)
*
* Deprecated: 4.10
**/
void
gtk_render_option (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_do_render_icon (context, cr, x, y, width, height);
}
/**
* gtk_render_arrow:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north
* @x: X origin of the render area
* @y: Y origin of the render area
* @size: square side for render area
*
* Renders an arrow pointing to @angle.
*
* Typical arrow rendering at 0, 1⁄2 π;, π; and 3⁄2 π:
*
* ![](arrows.png)
*
* Deprecated: 4.10
**/
void
gtk_render_arrow (GtkStyleContext *context,
cairo_t *cr,
double angle,
double x,
double y,
double size)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (size <= 0)
return;
gtk_do_render_icon (context, cr, x, y, size, size);
}
/**
* gtk_render_background:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders the background of an element.
*
* Typical background rendering, showing the effect of
* `background-image`, `border-width` and `border-radius`:
*
* ![](background.png)
*
* Deprecated: 4.10
**/
void
gtk_render_background (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
snapshot = gtk_snapshot_new ();
gtk_snapshot_render_background (snapshot, context, x, y, width, height);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**
* gtk_render_frame:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a frame around the rectangle defined by @x, @y, @width, @height.
*
* Examples of frame rendering, showing the effect of `border-image`,
* `border-color`, `border-width`, `border-radius` and junctions:
*
* ![](frames.png)
*
* Deprecated: 4.10
**/
void
gtk_render_frame (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
snapshot = gtk_snapshot_new ();
gtk_snapshot_render_frame (snapshot, context, x, y, width, height);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**
* gtk_render_expander:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an expander (as used in `GtkTreeView` and `GtkExpander`) in the area
* defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_CHECKED
* determines whether the expander is collapsed or expanded.
*
* Typical expander rendering:
*
* ![](expanders.png)
*
* Deprecated: 4.10
**/
void
gtk_render_expander (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_do_render_icon (context, cr, x, y, width, height);
}
/**
* gtk_render_focus:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a focus indicator on the rectangle determined by @x, @y, @width, @height.
*
* Typical focus rendering:
*
* ![](focus.png)
*
* Deprecated: 4.10
**/
void
gtk_render_focus (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
snapshot = gtk_snapshot_new ();
gtk_snapshot_render_frame (snapshot, context, x, y, width, height);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**
* gtk_render_layout:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin
* @y: Y origin
* @layout: the `PangoLayout` to render
*
* Renders @layout on the coordinates @x, @y
*
* Deprecated: 4.10
**/
void
gtk_render_layout (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
PangoLayout *layout)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (cr != NULL);
snapshot = gtk_snapshot_new ();
gtk_snapshot_render_layout (snapshot, context, x, y, layout);
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
gsk_render_node_unref (node);
}
/**
* gtk_render_line:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x0: X coordinate for the origin of the line
* @y0: Y coordinate for the origin of the line
* @x1: X coordinate for the end of the line
* @y1: Y coordinate for the end of the line
*
* Renders a line from (x0, y0) to (x1, y1).
*
* Deprecated: 4.10
**/
void
gtk_render_line (GtkStyleContext *context,
cairo_t *cr,
double x0,
double y0,
double x1,
double y1)
{
const GdkRGBA *color;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
cairo_save (cr);
color = gtk_css_color_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_width (cr, 1);
cairo_move_to (cr, x0 + 0.5, y0 + 0.5);
cairo_line_to (cr, x1 + 0.5, y1 + 0.5);
gdk_cairo_set_source_rgba (cr, color);
cairo_stroke (cr);
cairo_restore (cr);
}
/**
* gtk_render_handle:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a handle (as in `GtkPaned` and `GtkWindow`’s resize grip),
* in the rectangle determined by @x, @y, @width, @height.
*
* Handles rendered for the paned and grip classes:
*
* ![](handles.png)
*
* Deprecated: 4.10
**/
void
gtk_render_handle (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_render_background (context, cr, x, y, width, height);
gtk_render_frame (context, cr, x, y, width, height);
gtk_do_render_icon (context, cr, x, y, width, height);
}
/**
* gtk_render_activity:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an activity indicator (such as in `GtkSpinner`).
* The state %GTK_STATE_FLAG_CHECKED determines whether there is
* activity going on.
*
* Deprecated: 4.10
**/
void
gtk_render_activity (GtkStyleContext *context,
cairo_t *cr,
double x,
double y,
double width,
double height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
gtk_do_render_icon (context, cr, x, y, width, height);
}
/**
* gtk_render_icon:
* @context: a `GtkStyleContext`
* @cr: a `cairo_t`
* @texture: a `GdkTexture` containing the icon to draw
* @x: X position for the @texture
* @y: Y position for the @texture
*
* Renders the icon in @texture at the specified @x and @y coordinates.
*
* This function will render the icon in @texture at exactly its size,
* regardless of scaling factors, which may not be appropriate when
* drawing on displays with high pixel densities.
*
* Deprecated: 4.10
**/
void
gtk_render_icon (GtkStyleContext *context,
cairo_t *cr,
GdkTexture *texture,
double x,
double y)
{
GtkSnapshot *snapshot;
GskRenderNode *node;
snapshot = gtk_snapshot_new ();
gtk_css_style_snapshot_icon_paintable (gtk_style_context_lookup_style (context),
snapshot,
GDK_PAINTABLE (texture),
gdk_texture_get_width (texture),
gdk_texture_get_height (texture));
node = gtk_snapshot_free_to_node (snapshot);
if (node == NULL)
return;
cairo_save (cr);
cairo_translate (cr, x, y);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
}
/**
* gtk_snapshot_render_background:
* @snapshot: a `GtkSnapshot`
* @context: the style context that defines the background
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Creates a render node for the CSS background according to @context,
* and appends it to the current node of @snapshot, without changing
* the current node.
*
* Deprecated: 4.10
*/
void
gtk_snapshot_render_background (GtkSnapshot *snapshot,
GtkStyleContext *context,
double x,
double y,
double width,
double height)
{
GtkCssBoxes boxes;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_boxes_init_border_box (&boxes,
gtk_style_context_lookup_style (context),
x, y, width, height);
gtk_css_style_snapshot_background (&boxes, snapshot);
}
/**
* gtk_snapshot_render_frame:
* @snapshot: a `GtkSnapshot`
* @context: the style context that defines the frame
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Creates a render node for the CSS border according to @context,
* and appends it to the current node of @snapshot, without changing
* the current node.
*
* Deprecated: 4.10
*/
void
gtk_snapshot_render_frame (GtkSnapshot *snapshot,
GtkStyleContext *context,
double x,
double y,
double width,
double height)
{
GtkCssBoxes boxes;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_boxes_init_border_box (&boxes,
gtk_style_context_lookup_style (context),
x, y, width, height);
gtk_css_style_snapshot_border (&boxes, snapshot);
}
/**
* gtk_snapshot_render_focus:
* @snapshot: a `GtkSnapshot`
* @context: the style context that defines the focus ring
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Creates a render node for the focus outline according to @context,
* and appends it to the current node of @snapshot, without changing
* the current node.
*
* Deprecated: 4.10
*/
void
gtk_snapshot_render_focus (GtkSnapshot *snapshot,
GtkStyleContext *context,
double x,
double y,
double width,
double height)
{
GtkCssBoxes boxes;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_boxes_init_border_box (&boxes,
gtk_style_context_lookup_style (context),
x, y, width, height);
gtk_css_style_snapshot_outline (&boxes, snapshot);
}
/**
* gtk_snapshot_render_layout:
* @snapshot: a `GtkSnapshot`
* @context: the style context that defines the text
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @layout: the `PangoLayout` to render
*
* Creates a render node for rendering @layout according to the style
* information in @context, and appends it to the current node of @snapshot,
* without changing the current node.
*
* Deprecated: 4.10
*/
void
gtk_snapshot_render_layout (GtkSnapshot *snapshot,
GtkStyleContext *context,
double x,
double y,
PangoLayout *layout)
{
GtkCssBoxes boxes;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
gtk_css_boxes_init_border_box (&boxes,
gtk_style_context_lookup_style (context),
x, y, 0, 0);
gtk_css_style_snapshot_layout (&boxes, snapshot, x, y, layout);
}
/**
* gtk_snapshot_render_insertion_cursor:
* @snapshot: snapshot to render to
* @context: a `GtkStyleContext`
* @x: X origin
* @y: Y origin
* @layout: the `PangoLayout` of the text
* @index: the index in the `PangoLayout`
* @direction: the `PangoDirection` of the text
*
* Draws a text caret using @snapshot at the specified index of @layout.
*
* Deprecated: 4.10
*/
void
gtk_snapshot_render_insertion_cursor (GtkSnapshot *snapshot,
GtkStyleContext *context,
double x,
double y,
PangoLayout *layout,
int index,
PangoDirection direction)
{
GtkCssBoxes boxes;
GdkDisplay *display;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (index >= 0);
gtk_css_boxes_init_border_box (&boxes,
gtk_style_context_lookup_style (context),
x, y, 0, 0);
display = gtk_style_context_get_display (context);
gtk_css_style_snapshot_caret (&boxes, display, snapshot, x, y, layout, index, direction);
}