static gboolean _lib_histogram_scroll_callback(GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
dt_lib_module_t *self = (dt_lib_module_t *)user_data;
dt_lib_histogram_t *d = (dt_lib_histogram_t *)self->data;
float ce = dt_dev_exposure_get_exposure(darktable.develop);
float cb = dt_dev_exposure_get_black(darktable.develop);
if(event->direction == GDK_SCROLL_UP && d->highlight == 2)
dt_dev_exposure_set_exposure(darktable.develop, ce + 0.15);
if(event->direction == GDK_SCROLL_DOWN && d->highlight == 2)
dt_dev_exposure_set_exposure(darktable.develop, ce - 0.15);
if(event->direction == GDK_SCROLL_UP && d->highlight == 1)
dt_dev_exposure_set_black(darktable.develop, cb - 0.001);
if(event->direction == GDK_SCROLL_DOWN && d->highlight == 1)
dt_dev_exposure_set_black(darktable.develop, cb + 0.001);
return TRUE;
}
static gboolean _lib_histogram_scroll_callback(GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
{
dt_lib_module_t *self = (dt_lib_module_t *)user_data;
dt_lib_histogram_t *d = (dt_lib_histogram_t *)self->data;
float ce = dt_dev_exposure_get_exposure(darktable.develop);
float cb = dt_dev_exposure_get_black(darktable.develop);
int delta_y;
// note are using unit rather than smooth scroll events, as
// exposure changes can get laggy if handling a multitude of smooth
// scroll events
if(dt_gui_get_scroll_unit_deltas(event, NULL, &delta_y))
{
if(d->highlight == 2)
dt_dev_exposure_set_exposure(darktable.develop, ce - 0.15f * delta_y);
else if(d->highlight == 1)
dt_dev_exposure_set_black(darktable.develop, cb + 0.001f * delta_y);
}
return TRUE;
}
static gboolean _lib_histogram_motion_notify_callback(GtkWidget *widget, GdkEventMotion *event,
gpointer user_data)
{
dt_lib_module_t *self = (dt_lib_module_t *)user_data;
dt_lib_histogram_t *d = (dt_lib_histogram_t *)self->data;
/* check if exposure hooks are available */
gboolean hooks_available = dt_dev_exposure_hooks_available(darktable.develop);
if(!hooks_available) return TRUE;
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
if(d->dragging && d->highlight == 2)
{
float exposure = d->exposure + (event->x - d->button_down_x) * 4.0f / (float)allocation.width;
dt_dev_exposure_set_exposure(darktable.develop, exposure);
}
else if(d->dragging && d->highlight == 1)
{
float black = d->black - (event->x - d->button_down_x) * .1f / (float)allocation.width;
dt_dev_exposure_set_black(darktable.develop, black);
}
else
{
const float offs = 4 * DT_HIST_INSET;
const float x = event->x - offs;
const float y = event->y - DT_HIST_INSET;
const float pos = x / (float)(allocation.width - 2 * offs);
if(pos < 0 || pos > 1.0)
;
else if(x > d->mode_x && x < d->mode_x + d->mode_w && y > d->button_y && y < d->button_y + d->button_h)
{
d->highlight = 3;
switch(darktable.develop->histogram_type)
{
case DT_DEV_HISTOGRAM_LOGARITHMIC:
g_object_set(G_OBJECT(widget), "tooltip-text", _("set histogram mode to linear"), (char *)NULL);
break;
case DT_DEV_HISTOGRAM_LINEAR:
g_object_set(G_OBJECT(widget), "tooltip-text", _("set histogram mode to waveform"), (char *)NULL);
break;
case DT_DEV_HISTOGRAM_WAVEFORM:
g_object_set(G_OBJECT(widget), "tooltip-text", _("set histogram mode to logarithmic"), (char *)NULL);
break;
case DT_DEV_HISTOGRAM_N:
g_assert_not_reached();
}
}
else if(x > d->red_x && x < d->red_x + d->color_w && y > d->button_y && y < d->button_y + d->button_h)
{
d->highlight = 4;
g_object_set(G_OBJECT(widget), "tooltip-text",
d->red ? _("click to hide red channel") : _("click to show red channel"), (char *)NULL);
}
else if(x > d->green_x && x < d->green_x + d->color_w && y > d->button_y && y < d->button_y + d->button_h)
{
d->highlight = 5;
g_object_set(G_OBJECT(widget), "tooltip-text",
d->red ? _("click to hide green channel") : _("click to show green channel"),
(char *)NULL);
}
else if(x > d->blue_x && x < d->blue_x + d->color_w && y > d->button_y && y < d->button_y + d->button_h)
{
d->highlight = 6;
g_object_set(G_OBJECT(widget), "tooltip-text",
d->red ? _("click to hide blue channel") : _("click to show blue channel"), (char *)NULL);
}
else if(pos < 0.2)
{
d->highlight = 1;
g_object_set(G_OBJECT(widget), "tooltip-text", _("drag to change black point,\ndoubleclick resets"),
(char *)NULL);
}
else
{
d->highlight = 2;
g_object_set(G_OBJECT(widget), "tooltip-text", _("drag to change exposure,\ndoubleclick resets"),
(char *)NULL);
}
gtk_widget_queue_draw(widget);
}
gint x, y; // notify gtk for motion_hint.
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);
return TRUE;
}
