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app: snap spin scale to page increments when holding Ctrl 

When click-dragging a GimpSpinScale while holding Ctrl, in either
absolute or relative mode, snap the value (or the delta) to the
page increment.
This commit is contained in:
Ell 2020-01-09 01:41:48 +02:00
parent ac8bf47fa6
commit 8d534dfde0
1 changed files with 26 additions and 9 deletions
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35
app/widgets/gimpspinscale.c
View File

@ -36,6 +36,9 @@
#include "gimp-intl.h"
#define RELATIVE_CHANGE_SPEED 0.1
enum
{
PROP_0,
@ -707,7 +710,8 @@ gimp_spin_scale_get_limits (GimpSpinScale *scale,
static void
gimp_spin_scale_change_value (GtkWidget *widget,
gdouble x)
gdouble x,
guint state)
{
GimpSpinScalePrivate *private = GET_PRIVATE (widget);
GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
@ -728,17 +732,23 @@ gimp_spin_scale_change_value (GtkWidget *widget,
if (private->relative_change)
{
gdouble diff;
gdouble step;
step = (upper - lower) / text_area.width / 10.0;
step = (upper - lower) / text_area.width * RELATIVE_CHANGE_SPEED;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
diff = x - (text_area.width - private->start_x);
step *= x - (text_area.width - private->start_x);
else
diff = x - private->start_x;
step *= x - private->start_x;
value = (private->start_value + diff * step);
if (state & GDK_CONTROL_MASK)
{
gdouble page_inc = gtk_adjustment_get_page_increment (adjustment);
step = RINT (step / page_inc) * page_inc;
}
value = private->start_value + step;
}
else
{
@ -749,6 +759,13 @@ gimp_spin_scale_change_value (GtkWidget *widget,
fraction = pow (fraction, private->gamma);
value = fraction * (upper - lower) + lower;
if (state & GDK_CONTROL_MASK)
{
gdouble page_inc = gtk_adjustment_get_page_increment (adjustment);
value = RINT (value / page_inc) * page_inc;
}
}
digits = gtk_spin_button_get_digits (spin_button);
@ -793,7 +810,7 @@ gimp_spin_scale_button_press (GtkWidget *widget,
gtk_widget_grab_focus (widget);
gimp_spin_scale_change_value (widget, x);
gimp_spin_scale_change_value (widget, x, event->state);
return TRUE;
@ -838,7 +855,7 @@ gimp_spin_scale_button_release (GtkWidget *widget,
* gimp_spin_scale_motion_notify().
*/
if (! private->pointer_warp)
gimp_spin_scale_change_value (widget, event->x);
gimp_spin_scale_change_value (widget, event->x, event->state);
if (private->relative_change)
{
@ -933,7 +950,7 @@ gimp_spin_scale_motion_notify (GtkWidget *widget,
private->start_x = private->pointer_warp_start_x;
}
gimp_spin_scale_change_value (widget, event->x);
gimp_spin_scale_change_value (widget, event->x, event->state);
if (private->relative_change)
{