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color-scale: remove Adwaita GtkColorScale trough hack

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Instead of special-casing Adwaita, apply the half-width logic for themes
that have a scale slider with vertical proportions.
Also, simplify the rendering code a bit by factoring out the trough
sizing logic.
This commit is contained in:
Cosimo Cecchi
2012-02-14 14:02:43 -05:00
committed by Matthias Clasen
parent 19da38b811
commit bef12c003c
1 changed files with 63 additions and 40 deletions
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103
gtk/gtkcolorscale.c
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@@ -29,6 +29,8 @@
#include "gtkprivate.h"
#include "gtkintl.h"
#include <math.h>
struct _GtkColorScalePrivate
{
cairo_surface_t *surface;
@@ -45,6 +47,57 @@ enum
G_DEFINE_TYPE (GtkColorScale, gtk_color_scale, GTK_TYPE_SCALE)
static void
gtk_color_scale_get_trough_size (GtkColorScale *scale,
gint *x_offset_out,
gint *y_offset_out,
gint *width_out,
gint *height_out)
{
GtkWidget *widget = GTK_WIDGET (scale);
gint width, height, focus_line_width, focus_padding;
gint x_offset, y_offset;
gint slider_width, slider_height;
gtk_widget_style_get (widget,
"focus-line-width", &focus_line_width,
"focus-padding", &focus_padding,
"slider-width", &slider_width,
"slider-length", &slider_height,
NULL);
width = gtk_widget_get_allocated_width (widget) - 2 * (focus_line_width + focus_padding);
height = gtk_widget_get_allocated_height (widget) - 2 * (focus_line_width + focus_padding);
x_offset = focus_line_width + focus_padding;
y_offset = focus_line_width + focus_padding;
/* if the slider has a vertical shape, draw the trough asymmetric */
if (slider_width > slider_height)
{
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_VERTICAL)
{
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
x_offset += (gint) floor (slider_width / 2.0);
width = (gint) floor (slider_width / 2.0);
}
else
{
height = (gint) floor (slider_width / 2.0);
}
}
if (width_out)
*width_out = width;
if (height_out)
*height_out = height;
if (x_offset_out)
*x_offset_out = x_offset;
if (y_offset_out)
*y_offset_out = y_offset;
}
static void
create_surface (GtkColorScale *scale)
{
@@ -55,8 +108,9 @@ create_surface (GtkColorScale *scale)
if (!gtk_widget_get_realized (widget))
return;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_color_scale_get_trough_size (scale,
NULL, NULL,
&width, &height);
if (!scale->priv->surface ||
width != scale->priv->width ||
@@ -151,54 +205,23 @@ create_surface (GtkColorScale *scale)
}
}
static gboolean
scale_has_asymmetric_thumb (GtkWidget *widget)
{
gchar *theme;
gboolean res;
g_object_get (gtk_widget_get_settings (widget),
"gtk-theme-name", &theme,
NULL);
res = strcmp ("Adwaita", theme) == 0;
g_free (theme);
return res;
}
static gboolean
scale_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkColorScale *scale = GTK_COLOR_SCALE (widget);
gint width, height;
gint width, height, x_offset, y_offset;
cairo_pattern_t *pattern;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
create_surface (scale);
gtk_color_scale_get_trough_size (scale,
&x_offset, &y_offset,
&width, &height);
cairo_save (cr);
cairo_translate (cr, x_offset, y_offset);
cairo_rectangle (cr, 0, 0, width, height);
if (scale_has_asymmetric_thumb (widget))
{
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_VERTICAL)
{
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
cairo_rectangle (cr, 1, 1, width / 2 - 1, height - 2);
else
cairo_rectangle (cr, width / 2, 1, width / 2 - 1, height - 2);
}
else
{
cairo_rectangle (cr, 1, 1, width - 2, height / 2);
}
}
else
cairo_rectangle (cr, 1, 1, width - 2, height - 2);
cairo_clip (cr);
pattern = cairo_pattern_create_for_surface (scale->priv->surface);
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
@@ -210,7 +233,7 @@ scale_draw (GtkWidget *widget,
cairo_pattern_set_matrix (pattern, &matrix);
}
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_fill (cr);
cairo_pattern_destroy (pattern);