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Interpret min_value == max_value correctly

Browse Source 
https://bugzilla.gnome.org/show_bug.cgi?id=588649

Signed-off-by: Thomas Jaeger <ThJaeger@gmail.com>
This commit is contained in:
Thomas Jaeger 2009-09-29 02:23:25 -04:00 committed by Alexander Larsson
parent 70bd23537f
commit 35845f1efe
1 changed files with 22 additions and 5 deletions
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27
gdk/x11/gdkinput-x11.c
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@ -409,7 +409,7 @@ gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
int x_axis = 0;
int y_axis = 0;
double device_width, device_height;
double device_width, device_height, x_min, y_min;
double x_offset, y_offset, x_scale, y_scale;
priv = (GdkWindowObject *) window;
@ -431,7 +431,26 @@ gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
}
device_width = gdkdev->axes[x_axis].max_value - gdkdev->axes[x_axis].min_value;
if (device_width > 0)
{
x_min = gdkdev->axes[x_axis].min_value;
}
else
{
device_width = gdk_screen_get_width (gdk_drawable_get_screen (window));
x_min = 0;
}
device_height = gdkdev->axes[y_axis].max_value - gdkdev->axes[y_axis].min_value;
if (device_height > 0)
{
y_min = gdkdev->axes[y_axis].min_value;
}
else
{
device_height = gdk_screen_get_height (gdk_drawable_get_screen (window));
y_min = 0;
}
if (gdkdev->info.mode == GDK_MODE_SCREEN)
{
@ -488,14 +507,12 @@ gdk_input_translate_coordinates (GdkDevicePrivate *gdkdev,
switch (gdkdev->info.axes[i].use)
{
case GDK_AXIS_X:
axis_out[i] = x_offset + x_scale * (axis_data[x_axis] -
gdkdev->axes[x_axis].min_value);
axis_out[i] = x_offset + x_scale * (axis_data[x_axis] - x_min);
if (x_out)
*x_out = axis_out[i];
break;
case GDK_AXIS_Y:
axis_out[i] = y_offset + y_scale * (axis_data[y_axis] -
gdkdev->axes[y_axis].min_value);
axis_out[i] = y_offset + y_scale * (axis_data[y_axis] - y_min);
if (y_out)
*y_out = axis_out[i];
break;