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gtk-demo: Add support for distance in event_axes

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Signed-off-by: Stephen Chandler Paul <thatslyude@gmail.com>
This commit is contained in:
Stephen Chandler Paul 2015-02-09 22:02:08 -05:00 committed by Carlos Garnacho
parent 6c2a078bf2
commit 505dac94be
1 changed files with 28 additions and 1 deletions
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29
demos/gtk-demo/event_axes.c
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@ -206,7 +206,7 @@ draw_axes_info (cairo_t *cr,
AxesInfo *info,
GtkAllocation *allocation)
{
gdouble pressure, tilt_x, tilt_y, wheel;
gdouble pressure, tilt_x, tilt_y, distance, wheel;
GdkAxisFlags axes = gdk_device_get_axes (info->last_source);
cairo_save (cr);
@ -258,6 +258,33 @@ draw_axes_info (cairo_t *cr,
render_arrow (cr, tilt_x * 100, tilt_y * 100, "Tilt");
}
if (axes & GDK_AXIS_FLAG_DISTANCE)
{
double dashes[] = { 5.0, 5.0 };
cairo_text_extents_t extents;
gdk_device_get_axis (info->last_source, info->axes, GDK_AXIS_DISTANCE,
&distance);
cairo_save (cr);
cairo_move_to (cr, distance * 100, 0);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_set_dash (cr, dashes, 2, 0.0);
cairo_arc (cr, 0, 0, distance * 100, 0, 2 * G_PI);
cairo_stroke (cr);
cairo_move_to (cr, 0, -distance * 100);
cairo_text_extents (cr, "Distance", &extents);
cairo_rel_move_to (cr, -extents.width / 2, 0);
cairo_show_text (cr, "Distance");
cairo_move_to (cr, 0, 0);
cairo_restore (cr);
}
if (axes & GDK_AXIS_FLAG_WHEEL)
{
gdk_device_get_axis (info->last_source, info->axes, GDK_AXIS_WHEEL,