/*
* update_cursor:
* @area: a #UmCropArea
* @x: x coordinate
* @y: y coordinate
*
* Update the type of the cursor, depending on which point of the crop
* rectangle the pointer is over.
*/
static void
update_cursor (UmCropArea *area,
gint x,
gint y)
{
UmCropAreaPrivate *priv = um_crop_area_get_instance_private (area);
gint cursor_type;
GdkRectangle crop;
gint region;
region = priv->active_region;
if (region == OUTSIDE) {
crop_to_widget (area, &crop);
region = find_location (&crop, x, y);
}
switch (region) {
case OUTSIDE:
cursor_type = GDK_LEFT_PTR;
break;
case TOP_LEFT:
cursor_type = GDK_TOP_LEFT_CORNER;
break;
case TOP:
cursor_type = GDK_TOP_SIDE;
break;
case TOP_RIGHT:
cursor_type = GDK_TOP_RIGHT_CORNER;
break;
case LEFT:
cursor_type = GDK_LEFT_SIDE;
break;
case INSIDE:
cursor_type = GDK_FLEUR;
break;
case RIGHT:
cursor_type = GDK_RIGHT_SIDE;
break;
case BOTTOM_LEFT:
cursor_type = GDK_BOTTOM_LEFT_CORNER;
break;
case BOTTOM:
cursor_type = GDK_BOTTOM_SIDE;
break;
case BOTTOM_RIGHT:
cursor_type = GDK_BOTTOM_RIGHT_CORNER;
break;
default:
g_assert_not_reached ();
}
if (cursor_type != priv->current_cursor) {
GdkCursor *cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (area)),
cursor_type);
gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (area)), cursor);
g_object_unref (cursor);
priv->current_cursor = cursor_type;
}
}
static gboolean
um_crop_area_button_release_event (GtkWidget *widget,
GdkEventButton *event)
{
UmCropArea *area = UM_CROP_AREA (widget);
GdkRectangle crop;
if (area->priv->browse_pixbuf == NULL)
return FALSE;
crop_to_widget (area, &crop);
area->priv->last_press_x = -1;
area->priv->last_press_y = -1;
area->priv->active_region = OUTSIDE;
gtk_widget_queue_draw_area (widget,
crop.x - 1, crop.y - 1,
crop.width + 2, crop.height + 2);
return FALSE;
}
static gboolean
um_crop_area_button_press_event (GtkWidget *widget,
GdkEventButton *event)
{
UmCropArea *area = UM_CROP_AREA (widget);
GdkRectangle crop;
if (area->priv->browse_pixbuf == NULL)
return FALSE;
crop_to_widget (area, &crop);
area->priv->last_press_x = (event->x - area->priv->image.x) / area->priv->scale;
area->priv->last_press_y = (event->y - area->priv->image.y) / area->priv->scale;
area->priv->active_region = find_location (&crop, event->x, event->y);
gtk_widget_queue_draw_area (widget,
crop.x - 1, crop.y - 1,
crop.width + 2, crop.height + 2);
return FALSE;
}
static gboolean
um_crop_area_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event)
{
UmCropArea *area = UM_CROP_AREA (widget);
gint x, y;
gint delta_x, delta_y;
gint width, height;
gint adj_width, adj_height;
gint pb_width, pb_height;
GdkRectangle damage;
gint left, right, top, bottom;
gdouble new_width, new_height;
gdouble center_x, center_y;
gint min_width, min_height;
if (area->priv->browse_pixbuf == NULL)
return FALSE;
update_cursor (area, event->x, event->y);
crop_to_widget (area, &damage);
gtk_widget_queue_draw_area (widget,
damage.x - 1, damage.y - 1,
damage.width + 2, damage.height + 2);
pb_width = gdk_pixbuf_get_width (area->priv->browse_pixbuf);
pb_height = gdk_pixbuf_get_height (area->priv->browse_pixbuf);
x = (event->x - area->priv->image.x) / area->priv->scale;
y = (event->y - area->priv->image.y) / area->priv->scale;
delta_x = x - area->priv->last_press_x;
delta_y = y - area->priv->last_press_y;
area->priv->last_press_x = x;
area->priv->last_press_y = y;
left = area->priv->crop.x;
right = area->priv->crop.x + area->priv->crop.width - 1;
top = area->priv->crop.y;
bottom = area->priv->crop.y + area->priv->crop.height - 1;
center_x = (left + right) / 2.0;
center_y = (top + bottom) / 2.0;
switch (area->priv->active_region) {
case INSIDE:
width = right - left + 1;
height = bottom - top + 1;
left += delta_x;
right += delta_x;
top += delta_y;
bottom += delta_y;
if (left < 0)
left = 0;
if (top < 0)
top = 0;
if (right > pb_width)
right = pb_width;
if (bottom > pb_height)
bottom = pb_height;
adj_width = right - left + 1;
adj_height = bottom - top + 1;
if (adj_width != width) {
if (delta_x < 0)
right = left + width - 1;
else
left = right - width + 1;
}
if (adj_height != height) {
if (delta_y < 0)
bottom = top + height - 1;
else
top = bottom - height + 1;
}
break;
case TOP_LEFT:
if (area->priv->aspect < 0) {
top = y;
left = x;
}
else if (y < eval_radial_line (center_x, center_y, left, top, x)) {
top = y;
new_width = (bottom - top) * area->priv->aspect;
left = right - new_width;
}
else {
left = x;
new_height = (right - left) / area->priv->aspect;
top = bottom - new_height;
}
break;
case TOP:
top = y;
if (area->priv->aspect > 0) {
new_width = (bottom - top) * area->priv->aspect;
right = left + new_width;
}
break;
case TOP_RIGHT:
if (area->priv->aspect < 0) {
top = y;
right = x;
}
else if (y < eval_radial_line (center_x, center_y, right, top, x)) {
top = y;
new_width = (bottom - top) * area->priv->aspect;
right = left + new_width;
}
else {
right = x;
new_height = (right - left) / area->priv->aspect;
top = bottom - new_height;
}
break;
case LEFT:
left = x;
if (area->priv->aspect > 0) {
new_height = (right - left) / area->priv->aspect;
bottom = top + new_height;
}
break;
case BOTTOM_LEFT:
if (area->priv->aspect < 0) {
bottom = y;
left = x;
}
else if (y < eval_radial_line (center_x, center_y, left, bottom, x)) {
left = x;
new_height = (right - left) / area->priv->aspect;
bottom = top + new_height;
}
else {
bottom = y;
new_width = (bottom - top) * area->priv->aspect;
left = right - new_width;
}
break;
case RIGHT:
right = x;
if (area->priv->aspect > 0) {
new_height = (right - left) / area->priv->aspect;
bottom = top + new_height;
}
break;
case BOTTOM_RIGHT:
if (area->priv->aspect < 0) {
bottom = y;
right = x;
}
else if (y < eval_radial_line (center_x, center_y, right, bottom, x)) {
right = x;
new_height = (right - left) / area->priv->aspect;
bottom = top + new_height;
}
else {
bottom = y;
new_width = (bottom - top) * area->priv->aspect;
right = left + new_width;
}
break;
case BOTTOM:
bottom = y;
if (area->priv->aspect > 0) {
new_width = (bottom - top) * area->priv->aspect;
right= left + new_width;
}
break;
default:
return FALSE;
}
min_width = area->priv->base_width / area->priv->scale;
min_height = area->priv->base_height / area->priv->scale;
width = right - left + 1;
height = bottom - top + 1;
if (area->priv->aspect < 0) {
if (left < 0)
left = 0;
if (top < 0)
top = 0;
if (right > pb_width)
right = pb_width;
if (bottom > pb_height)
bottom = pb_height;
width = right - left + 1;
height = bottom - top + 1;
switch (area->priv->active_region) {
case LEFT:
case TOP_LEFT:
case BOTTOM_LEFT:
if (width < min_width)
left = right - min_width;
break;
case RIGHT:
case TOP_RIGHT:
case BOTTOM_RIGHT:
if (width < min_width)
right = left + min_width;
break;
default: ;
}
switch (area->priv->active_region) {
case TOP:
case TOP_LEFT:
case TOP_RIGHT:
if (height < min_height)
top = bottom - min_height;
break;
case BOTTOM:
case BOTTOM_LEFT:
case BOTTOM_RIGHT:
if (height < min_height)
bottom = top + min_height;
break;
default: ;
}
}
else {
if (left < 0 || top < 0 ||
right > pb_width || bottom > pb_height ||
width < min_width || height < min_height) {
left = area->priv->crop.x;
right = area->priv->crop.x + area->priv->crop.width - 1;
top = area->priv->crop.y;
bottom = area->priv->crop.y + area->priv->crop.height - 1;
}
}
area->priv->crop.x = left;
area->priv->crop.y = top;
area->priv->crop.width = right - left + 1;
area->priv->crop.height = bottom - top + 1;
crop_to_widget (area, &damage);
gtk_widget_queue_draw_area (widget,
damage.x - 1, damage.y - 1,
damage.width + 2, damage.height + 2);
return FALSE;
}
static gboolean
um_crop_area_draw (GtkWidget *widget,
cairo_t *cr)
{
GdkRectangle crop;
gint width, height;
UmCropArea *uarea = UM_CROP_AREA (widget);
if (uarea->priv->browse_pixbuf == NULL)
return FALSE;
update_pixbufs (uarea);
width = gdk_pixbuf_get_width (uarea->priv->pixbuf);
height = gdk_pixbuf_get_height (uarea->priv->pixbuf);
crop_to_widget (uarea, &crop);
gdk_cairo_set_source_pixbuf (cr, uarea->priv->color_shifted, 0, 0);
cairo_rectangle (cr, 0, 0, width, crop.y);
cairo_rectangle (cr, 0, crop.y, crop.x, crop.height);
cairo_rectangle (cr, crop.x + crop.width, crop.y, width - crop.x - crop.width, crop.height);
cairo_rectangle (cr, 0, crop.y + crop.height, width, height - crop.y - crop.height);
cairo_fill (cr);
gdk_cairo_set_source_pixbuf (cr, uarea->priv->pixbuf, 0, 0);
cairo_rectangle (cr, crop.x, crop.y, crop.width, crop.height);
cairo_fill (cr);
if (uarea->priv->active_region != OUTSIDE) {
gint x1, x2, y1, y2;
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_set_line_width (cr, 1.0);
x1 = crop.x + crop.width / 3.0;
x2 = crop.x + 2 * crop.width / 3.0;
y1 = crop.y + crop.height / 3.0;
y2 = crop.y + 2 * crop.height / 3.0;
cairo_move_to (cr, x1 + 0.5, crop.y);
cairo_line_to (cr, x1 + 0.5, crop.y + crop.height);
cairo_move_to (cr, x2 + 0.5, crop.y);
cairo_line_to (cr, x2 + 0.5, crop.y + crop.height);
cairo_move_to (cr, crop.x, y1 + 0.5);
cairo_line_to (cr, crop.x + crop.width, y1 + 0.5);
cairo_move_to (cr, crop.x, y2 + 0.5);
cairo_line_to (cr, crop.x + crop.width, y2 + 0.5);
cairo_stroke (cr);
}
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1.0);
cairo_rectangle (cr,
crop.x + 0.5,
crop.y + 0.5,
crop.width - 1.0,
crop.height - 1.0);
cairo_stroke (cr);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_set_line_width (cr, 2.0);
cairo_rectangle (cr,
crop.x + 2.0,
crop.y + 2.0,
crop.width - 4.0,
crop.height - 4.0);
cairo_stroke (cr);
return FALSE;
}
static gboolean
um_crop_area_expose (GtkWidget *widget,
GdkEventExpose *event)
{
cairo_t *cr;
GdkRectangle area;
GdkRectangle crop;
gint width, height;
UmCropArea *uarea = UM_CROP_AREA (widget);
if (uarea->priv->browse_pixbuf == NULL)
return FALSE;
update_pixbufs (uarea);
width = gdk_pixbuf_get_width (uarea->priv->pixbuf);
height = gdk_pixbuf_get_height (uarea->priv->pixbuf);
crop_to_widget (uarea, &crop);
area.x = 0;
area.y = 0;
area.width = width;
area.height = crop.y;
gdk_rectangle_intersect (&area, &event->area, &area);
gdk_draw_pixbuf (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
uarea->priv->color_shifted,
area.x, area.y,
area.x, area.y,
area.width, area.height,
GDK_RGB_DITHER_NONE, 0, 0);
area.x = 0;
area.y = crop.y;
area.width = crop.x;
area.height = crop.height;
gdk_rectangle_intersect (&area, &event->area, &area);
gdk_draw_pixbuf (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
uarea->priv->color_shifted,
area.x, area.y,
area.x, area.y,
area.width, area.height,
GDK_RGB_DITHER_NONE, 0, 0);
area.x = crop.x;
area.y = crop.y;
area.width = crop.width;
area.height = crop.height;
gdk_rectangle_intersect (&area, &event->area, &area);
gdk_draw_pixbuf (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
uarea->priv->pixbuf,
area.x, area.y,
area.x, area.y,
area.width, area.height,
GDK_RGB_DITHER_NONE, 0, 0);
area.x = crop.x + crop.width;
area.y = crop.y;
area.width = width - area.x;
area.height = crop.height;
gdk_rectangle_intersect (&area, &event->area, &area);
gdk_draw_pixbuf (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
uarea->priv->color_shifted,
area.x, area.y,
area.x, area.y,
area.width, area.height,
GDK_RGB_DITHER_NONE, 0, 0);
area.x = 0;
area.y = crop.y + crop.height;
area.width = width;
area.height = height - area.y;
gdk_rectangle_intersect (&area, &event->area, &area);
gdk_draw_pixbuf (widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
uarea->priv->color_shifted,
area.x, area.y,
area.x, area.y,
area.width, area.height,
GDK_RGB_DITHER_NONE, 0, 0);
cr = gdk_cairo_create (widget->window);
gdk_cairo_rectangle (cr, &event->area);
cairo_clip (cr);
if (uarea->priv->active_region != OUTSIDE) {
gint x1, x2, y1, y2;
gdk_cairo_set_source_color (cr, &widget->style->white);
cairo_set_line_width (cr, 1.0);
x1 = crop.x + crop.width / 3.0;
x2 = crop.x + 2 * crop.width / 3.0;
y1 = crop.y + crop.height / 3.0;
y2 = crop.y + 2 * crop.height / 3.0;
cairo_move_to (cr, x1 + 0.5, crop.y);
cairo_line_to (cr, x1 + 0.5, crop.y + crop.height);
cairo_move_to (cr, x2 + 0.5, crop.y);
cairo_line_to (cr, x2 + 0.5, crop.y + crop.height);
cairo_move_to (cr, crop.x, y1 + 0.5);
cairo_line_to (cr, crop.x + crop.width, y1 + 0.5);
cairo_move_to (cr, crop.x, y2 + 0.5);
cairo_line_to (cr, crop.x + crop.width, y2 + 0.5);
cairo_stroke (cr);
}
gdk_cairo_set_source_color (cr, &widget->style->black);
cairo_set_line_width (cr, 1.0);
cairo_rectangle (cr,
crop.x + 0.5,
crop.y + 0.5,
crop.width - 1.0,
crop.height - 1.0);
cairo_stroke (cr);
gdk_cairo_set_source_color (cr, &widget->style->white);
cairo_set_line_width (cr, 2.0);
cairo_rectangle (cr,
crop.x + 2.0,
crop.y + 2.0,
crop.width - 4.0,
crop.height - 4.0);
cairo_stroke (cr);
cairo_destroy (cr);
return FALSE;
}
