static void
gimp_ruler_queue_pos_redraw (GimpRuler *ruler)
{
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
const GdkRectangle rect = gimp_ruler_get_pos_rect (ruler, priv->position);
gtk_widget_queue_draw_area (GTK_WIDGET(ruler),
rect.x,
rect.y,
rect.width,
rect.height);
if (priv->last_pos_rect.width != 0 || priv->last_pos_rect.height != 0)
{
gtk_widget_queue_draw_area (GTK_WIDGET(ruler),
priv->last_pos_rect.x,
priv->last_pos_rect.y,
priv->last_pos_rect.width,
priv->last_pos_rect.height);
priv->last_pos_rect.x = 0;
priv->last_pos_rect.y = 0;
priv->last_pos_rect.width = 0;
priv->last_pos_rect.height = 0;
}
}
/**
* gimp_ruler_set_position:
* @ruler: a #GimpRuler
* @position: the position to set the ruler to
*
* This sets the position of the ruler.
*
* Since: 2.8
*/
void
gimp_ruler_set_position (GimpRuler *ruler,
gdouble position)
{
GimpRulerPrivate *priv;
g_return_if_fail (GIMP_IS_RULER (ruler));
priv = GIMP_RULER_GET_PRIVATE (ruler);
if (priv->position != position)
{
gdouble old_pos = priv->position;
priv->position = position;
g_object_notify (G_OBJECT (ruler), "position");
{
GdkRectangle rect;
rect = gimp_ruler_get_pos_rect (ruler, old_pos);
gtk_widget_queue_draw_area (GTK_WIDGET(ruler),
rect.x,
rect.y,
rect.width,
rect.height);
rect = gimp_ruler_get_pos_rect (ruler, position);
gtk_widget_queue_draw_area (GTK_WIDGET(ruler),
rect.x,
rect.y,
rect.width,
rect.height);
}
}
}
/**
* gimp_ruler_set_position:
* @ruler: a #GimpRuler
* @position: the position to set the ruler to
*
* This sets the position of the ruler.
*
* Since: 2.8
*/
void
gimp_ruler_set_position (GimpRuler *ruler,
gdouble position)
{
GimpRulerPrivate *priv;
g_return_if_fail (GIMP_IS_RULER (ruler));
priv = GIMP_RULER_GET_PRIVATE (ruler);
if (priv->position != position)
{
GdkRectangle rect;
gint xdiff, ydiff;
priv->position = position;
g_object_notify (G_OBJECT (ruler), "position");
rect = gimp_ruler_get_pos_rect (ruler, priv->position);
xdiff = rect.x - priv->last_pos_rect.x;
ydiff = rect.y - priv->last_pos_rect.y;
/*
* If the position has changed far enough, queue a redraw immediately.
* Otherwise, we only queue a redraw in a low priority idle handler, to
* allow for other things (like updating the canvas) to run.
*
* TODO: This might not be necessary any more in GTK3 with the frame
* clock. Investigate this more after the port to GTK3.
*/
if (priv->last_pos_rect.width != 0 &&
priv->last_pos_rect.height != 0 &&
(ABS (xdiff) > IMMEDIATE_REDRAW_THRESHOLD ||
ABS (ydiff) > IMMEDIATE_REDRAW_THRESHOLD))
{
gimp_ruler_queue_pos_redraw (ruler);
}
else if (! priv->pos_redraw_idle_id)
{
priv->pos_redraw_idle_id =
g_idle_add_full (G_PRIORITY_LOW,
gimp_ruler_idle_queue_pos_redraw,
ruler, NULL);
}
}
}
static void
gimp_ruler_draw_pos (GimpRuler *ruler,
cairo_t *cr)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GdkRectangle pos_rect;
if (! gtk_widget_is_drawable (widget))
return;
pos_rect = gimp_ruler_get_pos_rect (ruler, gimp_ruler_get_position (ruler));
if ((pos_rect.width > 0) && (pos_rect.height > 0))
{
GdkRGBA color;
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_move_to (cr, pos_rect.x, pos_rect.y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_line_to (cr, pos_rect.x + pos_rect.width / 2.0,
pos_rect.y + pos_rect.height);
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y);
}
else
{
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y + pos_rect.height / 2.0);
cairo_line_to (cr, pos_rect.x,
pos_rect.y + pos_rect.height);
}
cairo_fill (cr);
}
priv->last_pos_rect = pos_rect;
}
static void
gimp_ruler_draw_pos (GimpRuler *ruler, cairo_t *cr)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyle *style = gtk_widget_get_style (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkStateType state = gtk_widget_get_state (widget);
GdkRectangle pos_rect;
if (! gtk_widget_is_drawable (widget))
return;
pos_rect = gimp_ruler_get_pos_rect (ruler, gimp_ruler_get_position (ruler));
if ((pos_rect.width > 0) && (pos_rect.height > 0))
{
gdk_cairo_set_source_color (cr, &style->fg[state]);
cairo_move_to (cr, pos_rect.x, pos_rect.y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_line_to (cr, pos_rect.x + pos_rect.width / 2.0,
pos_rect.y + pos_rect.height);
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y);
}
else
{
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y + pos_rect.height / 2.0);
cairo_line_to (cr, pos_rect.x,
pos_rect.y + pos_rect.height);
}
cairo_fill (cr);
}
}
