static void
gimp_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (widget);
GtkStyle *style = gtk_widget_get_style (widget);
PangoLayout *layout;
PangoRectangle ink_rect;
gint size;
layout = gimp_ruler_get_layout (widget, "0123456789");
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
size = 2 + ink_rect.height * 1.7;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
requisition->width = style->xthickness * 2 + 1;
requisition->height = style->ythickness * 2 + size;
}
else
{
requisition->width = style->xthickness * 2 + size;
requisition->height = style->ythickness * 2 + 1;
}
}
static void
gimp_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (widget);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
PangoLayout *layout;
PangoRectangle ink_rect;
GtkBorder border;
gint size;
layout = gimp_ruler_get_layout (widget, "0123456789");
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
size = 2 + ink_rect.height * 1.7;
gtk_style_context_get_border (context, 0, &border);
requisition->width = border.left + border.right;
requisition->height = border.top + border.bottom;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
requisition->width += 1;
requisition->height += size;
}
else
{
requisition->width += size;
requisition->height += 1;
}
}
static void
gimp_ruler_draw_ticks (GimpRuler *ruler)
{
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);
GtkAllocation allocation;
cairo_t *cr;
gint i;
gint width, height;
gint xthickness;
gint ythickness;
gint length, ideal_length;
gdouble lower, upper; /* Upper and lower limits, in ruler units */
gdouble increment; /* Number of pixels per unit */
gint scale; /* Number of units per major unit */
gdouble start, end, cur;
gchar unit_str[32];
gint digit_height;
gint digit_offset;
gint text_size;
gint pos;
gdouble max_size;
GimpUnit unit;
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
xthickness = style->xthickness;
ythickness = style->ythickness;
layout = gimp_ruler_get_layout (widget, "0123456789");
pango_layout_get_extents (layout, &ink_rect, &logical_rect);
digit_height = PANGO_PIXELS (ink_rect.height) + 2;
digit_offset = ink_rect.y;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
}
else
{
width = allocation.height;
height = allocation.width - ythickness * 2;
}
cr = cairo_create (priv->backing_store);
gdk_cairo_set_source_color (cr, &style->bg[state]);
#if 0
gtk_paint_box (style, priv->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget,
priv->orientation == GTK_ORIENTATION_HORIZONTAL ?
"hruler" : "vruler",
0, 0,
allocation.width, allocation.height);
#else
cairo_paint (cr);
#endif
gdk_cairo_set_source_color (cr, &style->fg[state]);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
xthickness,
height + ythickness,
allocation.width - 2 * xthickness,
1);
}
else
{
cairo_rectangle (cr,
height + xthickness,
ythickness,
1,
allocation.height - 2 * ythickness);
}
gimp_ruler_get_range (ruler, &lower, &upper, &max_size);
if ((upper - lower) == 0)
goto out;
increment = (gdouble) width / (upper - lower);
/* determine the scale
* use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*
* We calculate the text size as for the vruler instead of
* actually measuring the text width, so that the result for the
* scale looks consistent with an accompanying vruler.
*/
scale = ceil (max_size);
g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
text_size = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_size)
break;
if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;
unit = gimp_ruler_get_unit (ruler);
/* drawing starts here */
length = 0;
for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
{
gdouble subd_incr;
/* hack to get proper subdivisions at full pixels */
if (unit == GIMP_UNIT_PIXEL && scale == 1 && i == 1)
subd_incr = 1.0;
else
subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
(gdouble) ruler_metric.subdivide[i]);
if (subd_incr * fabs (increment) <= MINIMUM_INCR)
continue;
/* don't subdivide pixels */
if (unit == GIMP_UNIT_PIXEL && subd_incr < 1.0)
continue;
/* Calculate the length of the tickmarks. Make sure that
* this length increases for each set of ticks
*/
ideal_length = height / (i + 1) - 1;
if (ideal_length > ++length)
length = ideal_length;
if (lower < upper)
{
start = floor (lower / subd_incr) * subd_incr;
end = ceil (upper / subd_incr) * subd_incr;
}
else
{
start = floor (upper / subd_incr) * subd_incr;
end = ceil (lower / subd_incr) * subd_incr;
}
for (cur = start; cur <= end; cur += subd_incr)
{
pos = ROUND ((cur - lower) * increment);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
pos, height + ythickness - length,
1, length);
}
else
{
cairo_rectangle (cr,
height + xthickness - length, pos,
length, 1);
}
/* draw label */
if (i == 0)
{
g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
pango_layout_set_text (layout, unit_str, -1);
pango_layout_get_extents (layout, &logical_rect, NULL);
#if 0
gtk_paint_layout (style,
priv->backing_store,
state,
FALSE,
NULL,
widget,
"hruler",
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
#else
cairo_move_to (cr,
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
#endif
}
else
{
gint j;
for (j = 0; j < (int) strlen (unit_str); j++)
{
pango_layout_set_text (layout, unit_str + j, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
#if 0
gtk_paint_layout (style,
priv->backing_store,
state,
FALSE,
NULL,
widget,
"vruler",
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
#else
cairo_move_to (cr,
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
#endif
}
}
}
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
}
