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| author | David Robillard <d@drobilla.net> | 2012-12-21 21:10:27 +0000 |
|---|---|---|
| committer | David Robillard <d@drobilla.net> | 2012-12-21 21:10:27 +0000 |
| commit | 1589beea3b5fcecb1658fae3476604684da80671 (patch) | |
| tree | 69d68d8fdbf9c2522b99f4924410f615320eaec9 /src/Canvas.cpp | |
| parent | b5e92da0baa38bd2d738b52e2d5c08bf389dd938 (diff) | |
| download | ganv-1589beea3b5fcecb1658fae3476604684da80671.tar.gz ganv-1589beea3b5fcecb1658fae3476604684da80671.tar.bz2 ganv-1589beea3b5fcecb1658fae3476604684da80671.zip | |
Improve port control sliders to make it easier to reach minimum / maximum value.
git-svn-id: http://svn.drobilla.net/lad/trunk/ganv@4879 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/Canvas.cpp')
| -rw-r--r-- | src/Canvas.cpp | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/src/Canvas.cpp b/src/Canvas.cpp index dcc59b2..13a326a 100644 --- a/src/Canvas.cpp +++ b/src/Canvas.cpp @@ -1181,26 +1181,31 @@ GanvCanvasImpl::port_event(GdkEvent* event, GanvPort* port) const int screen_height = gdk_screen_get_height(screen); const double drag_dx = mouse_x - control_start_x; const double drag_dy = mouse_y - control_start_y; + const double xpad = 100.0; // Pad from screen edge + const double ythresh = 0.2; // Minimum y fraction for fine - const double range_x = (drag_dx > 0) - ? (screen_width - control_start_x) - : control_start_x; + const double range_x = ((drag_dx > 0) + ? (screen_width - control_start_x) + : control_start_x) - xpad; - const double range_y = (drag_dy > 0) - ? (screen_height - control_start_y) - : control_start_y; + const double range_y = ((drag_dy > 0) + ? (screen_height - control_start_y) + : control_start_y); const double dx = drag_dx / range_x; - const double dy = drag_dy / range_y; + const double dy = fabs(drag_dy / range_y); const double value_range = (drag_dx > 0) ? port->impl->control->max - control_start_value : control_start_value - port->impl->control->min; - const double sens = fmaxf(1.0 - fabs(dy), value_range / range_x); + const double fine = (dy < 0.20) + ? 0.0 + : ((dy - ythresh) * (1/(1 + ythresh))); + const double sens = fmaxf(1.0 - fine, value_range / range_x); const double dvalue = (dx * value_range) * sens; - double value = control_start_value + dvalue; + double value = control_start_value + dvalue; if (value < port->impl->control->min) { value = port->impl->control->min; } else if (value > port->impl->control->max) { |