diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/ld-canvas.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/ld-canvas.c b/src/ld-canvas.c index 0667adb..259d7d1 100644 --- a/src/ld-canvas.c +++ b/src/ld-canvas.c @@ -36,6 +36,9 @@ /* Tolerance on all sides of symbols for strokes. */ #define SYMBOL_AREA_TOLERANCE 0.5 +/* The default screen resolution in DPI units. */ +#define DEFAULT_SCREEN_RESOLUTION 96 + /* * LdCanvasPrivate: * @diagram: A diagram object assigned to this canvas as a model. @@ -455,11 +458,16 @@ ld_canvas_get_library (LdCanvas *self) static gdouble ld_canvas_get_base_unit_in_px (GtkWidget *self) { + gdouble resolution; + g_return_val_if_fail (GTK_IS_WIDGET (self), 1); + resolution = gdk_screen_get_resolution (gtk_widget_get_screen (self)); + if (resolution == -1) + resolution = DEFAULT_SCREEN_RESOLUTION; + /* XXX: It might look better if the unit was rounded to a whole number. */ - return gdk_screen_get_resolution (gtk_widget_get_screen (self)) - / MM_PER_INCH * LD_CANVAS_BASE_UNIT_LENGTH; + return resolution / MM_PER_INCH * LD_CANVAS_BASE_UNIT_LENGTH; } /* |