AuroraMiddleware/gtk
1
0
Fork 1
mirror of https://gitlab.gnome.org/GNOME/gtk.git synced 2024-12-24 20:51:10 +00:00
Code Issues Projects Releases Wiki Activity

gtk-demo: Work without stylus

Browse Source 
In the paint demo, don't assume that the event
backlog contains pressure. It won't, if we are
working with a plain old mouse.
This commit is contained in:
Matthias Clasen 2023-04-09 08:28:26 -04:00
parent 5970a14217
commit 7f906bef06
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
demos/gtk-demo/paint.c
View File

@ -263,7 +263,7 @@ drawing_area_apply_stroke (DrawingArea *area,
double y,
double pressure)
{
if (gdk_device_tool_get_tool_type (tool) == GDK_DEVICE_TOOL_TYPE_ERASER)
if (tool && gdk_device_tool_get_tool_type (tool) == GDK_DEVICE_TOOL_TYPE_ERASER)
{
cairo_set_line_width (area->cr, 10 * pressure * area->brush_size);
cairo_set_operator (area->cr, CAIRO_OPERATOR_DEST_OUT);
@ -314,7 +314,9 @@ stylus_gesture_motion (GtkGestureStylus *gesture,
drawing_area_apply_stroke (area, tool,
backlog[i].axes[GDK_AXIS_X],
backlog[i].axes[GDK_AXIS_Y],
backlog[i].axes[GDK_AXIS_PRESSURE]);
backlog[i].flags & GDK_AXIS_FLAG_PRESSURE
? backlog[i].axes[GDK_AXIS_PRESSURE]
: 1);
}
g_free (backlog);