static gboolean dt_iop_levels_scroll(GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
dt_iop_module_t *self = (dt_iop_module_t *)user_data;
dt_iop_levels_gui_data_t *c = (dt_iop_levels_gui_data_t *)self->gui_data;
dt_iop_levels_params_t *p = (dt_iop_levels_params_t *)self->params;
const float interval = 0.002; // Distance moved for each scroll event
gboolean updated = FALSE;
float new_position = 0;
if(c->dragging)
{
return FALSE;
}
if(event->direction == GDK_SCROLL_UP)
{
new_position = p->levels[c->handle_move] + interval;
updated = TRUE;
}
else if(event->direction == GDK_SCROLL_DOWN)
{
new_position = p->levels[c->handle_move] - interval;
updated = TRUE;
}
if(updated)
{
dt_iop_levels_move_handle(self, c->handle_move, new_position, p->levels, c->drag_start_percentage);
dt_dev_add_history_item(darktable.develop, self, TRUE);
return TRUE;
}
return FALSE;
}
static gboolean dt_iop_levels_scroll(GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
dt_iop_module_t *self = (dt_iop_module_t *)user_data;
dt_iop_levels_gui_data_t *c = (dt_iop_levels_gui_data_t *)self->gui_data;
dt_iop_levels_params_t *p = (dt_iop_levels_params_t *)self->params;
dt_iop_color_picker_reset(self, TRUE);
if(c->dragging)
{
return FALSE;
}
const float interval = 0.002; // Distance moved for each scroll event
gdouble delta_y;
if(dt_gui_get_scroll_deltas(event, NULL, &delta_y))
{
float new_position = p->levels[c->handle_move] - interval * delta_y;
dt_iop_levels_move_handle(self, c->handle_move, new_position, p->levels, c->drag_start_percentage);
dt_dev_add_history_item(darktable.develop, self, TRUE);
return TRUE;
}
return FALSE;
}
static gboolean dt_iop_levels_motion_notify(GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
{
dt_iop_module_t *self = (dt_iop_module_t *)user_data;
dt_iop_levels_gui_data_t *c = (dt_iop_levels_gui_data_t *)self->gui_data;
dt_iop_levels_params_t *p = (dt_iop_levels_params_t *)self->params;
const int inset = DT_GUI_CURVE_EDITOR_INSET;
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
int height = allocation.height - 2 * inset, width = allocation.width - 2 * inset;
if(!c->dragging)
{
c->mouse_x = CLAMP(event->x - inset, 0, width);
c->drag_start_percentage = (p->levels[1] - p->levels[0]) / (p->levels[2] - p->levels[0]);
}
c->mouse_y = CLAMP(event->y - inset, 0, height);
if(c->dragging)
{
if(c->handle_move >= 0 && c->handle_move < 3)
{
const float mx = (CLAMP(event->x - inset, 0, width)) / (float)width;
dt_iop_levels_move_handle(self, c->handle_move, mx, p->levels, c->drag_start_percentage);
}
dt_dev_add_history_item(darktable.develop, self, TRUE);
}
else
{
c->handle_move = 0;
const float mx = CLAMP(event->x - inset, 0, width) / (float)width;
float dist = fabsf(p->levels[0] - mx);
for(int k = 1; k < 3; k++)
{
float d2 = fabsf(p->levels[k] - mx);
if(d2 < dist)
{
c->handle_move = k;
dist = d2;
}
}
}
gtk_widget_queue_draw(widget);
gint x, y;
#if GTK_CHECK_VERSION(3, 20, 0)
gdk_window_get_device_position(event->window,
gdk_seat_get_pointer(gdk_display_get_default_seat(gtk_widget_get_display(widget))),
&x, &y, 0);
#else
gdk_window_get_device_position(event->window,
gdk_device_manager_get_client_pointer(
gdk_display_get_device_manager(gdk_window_get_display(event->window))),
&x, &y, NULL);
#endif
return TRUE;
}
static gboolean dt_iop_levels_motion_notify(GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
{
dt_iop_module_t *self = (dt_iop_module_t *)user_data;
dt_iop_levels_gui_data_t *c = (dt_iop_levels_gui_data_t *)self->gui_data;
dt_iop_levels_params_t *p = (dt_iop_levels_params_t *)self->params;
const int inset = DT_GUI_CURVE_EDITOR_INSET;
int height = widget->allocation.height - 2*inset, width = widget->allocation.width - 2*inset;
if(!c->dragging)
{
c->mouse_x = CLAMP(event->x - inset, 0, width);
c->drag_start_percentage = (p->levels[1] - p->levels[0])
/ (p->levels[2] - p->levels[0]);
}
c->mouse_y = CLAMP(event->y - inset, 0, height);
if(c->dragging)
{
if(c->handle_move >= 0 && c->handle_move < 3)
{
const float mx = (CLAMP(event->x - inset, 0, width)) / (float)width;
dt_iop_levels_move_handle(c->handle_move, mx, p->levels, c->drag_start_percentage);
}
dt_dev_add_history_item(darktable.develop, self, TRUE);
}
else
{
c->handle_move = 0;
const float mx = CLAMP(event->x - inset, 0, width)/(float)width;
float dist = fabsf(p->levels[0] - mx);
for(int k=1; k<3; k++)
{
float d2 = fabsf(p->levels[k] - mx);
if(d2 < dist)
{
c->handle_move = k;
dist = d2;
}
}
}
gtk_widget_queue_draw(widget);
gint x, y;
gdk_window_get_pointer(event->window, &x, &y, NULL);
return TRUE;
}