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cellrendererspinner: Draw our own spinner

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This is the GtkStyle code just moved.
This commit is contained in:
Benjamin Otte 2016-10-06 16:41:41 +02:00
parent 662001b60a
commit 1aa336b500
1 changed files with 79 additions and 11 deletions
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90
gtk/gtkcellrendererspinner.c
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@ -34,14 +34,13 @@
#include "gtksettings.h"
#include "gtktypebuiltins.h"
#include <math.h>
#undef GDK_DEPRECATED
#undef GDK_DEPRECATED_FOR
#define GDK_DEPRECATED
#define GDK_DEPRECATED_FOR(f)
#include "deprecated/gtkstyle.h"
/**
* SECTION:gtkcellrendererspinner
* @Short_description: Renders a spinning animation in a cell
@ -325,6 +324,75 @@ gtk_cell_renderer_spinner_get_size (GtkCellRenderer *cellr,
*height = h;
}
static void
gtk_paint_spinner (GtkStyleContext *context,
cairo_t *cr,
GtkStateType state_type,
GtkWidget *widget,
const gchar *detail,
guint step,
gint x,
gint y,
gint width,
gint height)
{
GdkRGBA color;
guint num_steps;
gdouble dx, dy;
gdouble radius;
gdouble half;
gint i;
guint real_step;
num_steps = 12;
real_step = step % num_steps;
/* set a clip region for the expose event */
cairo_rectangle (cr, x, y, width, height);
cairo_clip (cr);
cairo_translate (cr, x, y);
/* draw clip region */
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
gtk_style_context_get_color (context,
gtk_style_context_get_state (context),
&color);
dx = width / 2;
dy = height / 2;
radius = MIN (width / 2, height / 2);
half = num_steps / 2;
for (i = 0; i < num_steps; i++)
{
gint inset = 0.7 * radius;
/* transparency is a function of time and intial value */
gdouble t = (gdouble) ((i + num_steps - real_step)
% num_steps) / num_steps;
cairo_save (cr);
cairo_set_source_rgba (cr,
color.red / 65535.,
color.green / 65535.,
color.blue / 65535.,
color.alpha * t);
cairo_set_line_width (cr, 2.0);
cairo_move_to (cr,
dx + (radius - inset) * cos (i * G_PI / half),
dy + (radius - inset) * sin (i * G_PI / half));
cairo_line_to (cr,
dx + radius * cos (i * G_PI / half),
dy + radius * sin (i * G_PI / half));
cairo_stroke (cr);
cairo_restore (cr);
}
}
static void
gtk_cell_renderer_spinner_render (GtkCellRenderer *cellr,
cairo_t *cr,
@ -383,14 +451,14 @@ gtk_cell_renderer_spinner_render (GtkCellRenderer *cellr,
gdk_cairo_rectangle (cr, cell_area);
cairo_clip (cr);
gtk_paint_spinner (gtk_widget_get_style (widget),
cr,
state,
widget,
"cell",
priv->pulse,
draw_rect.x, draw_rect.y,
draw_rect.width, draw_rect.height);
gtk_paint_spinner (gtk_widget_get_style_context (widget),
cr,
state,
widget,
"cell",
priv->pulse,
draw_rect.x, draw_rect.y,
draw_rect.width, draw_rect.height);
cairo_restore (cr);
}