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// SPDX-License-Identifier: GPL-2.0-or-later
/**
* A CanvasItem that contains other CanvasItem's.
*/
/*
* Author:
* Tavmjong Bah
*
* Copyright (C) 2020 Tavmjong Bah
*
* Rewrite of SPCanvasGroup
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "canvas-item-group.h"
#include "canvas-item-ctrl.h" // Update sizes
namespace Inkscape {
CanvasItemGroup::CanvasItemGroup(CanvasItemGroup *group)
: CanvasItem(group)
{
_name = "CanvasItemGroup";
_pickable = true; // For now all groups are pickable... look into turning this off for some groups (e.g. temp).
}
CanvasItemGroup::~CanvasItemGroup()
{
while (!items.empty()) {
CanvasItem & item = items.front();
remove(&item);
}
if (_parent) {
_parent->remove(this, false); // remove() should not delete this or we'll double delete!
}
}
void CanvasItemGroup::add(CanvasItem *item)
{
#ifdef CANVAS_ITEM_DEBUG
std::cout << "CanvasItemGroup::add: " << item->get_name() << " to " << _name << " " << items.size() << std::endl;
#endif
items.push_back(*item);
// canvas request update
}
void CanvasItemGroup::remove(CanvasItem *item, bool Delete)
{
#ifdef CANVAS_ITEM_DEBUG
std::cout << "CanvasItemGroup::remove: " << item->get_name() << " from " << _name << " " << items.size() << std::endl;
#endif
auto position = items.iterator_to(*item);
if (position != items.end()) {
position->set_parent(nullptr);
items.erase(position);
if (Delete) {
delete (&*position); // An item directly deleted should not be deleted here.
}
}
}
void CanvasItemGroup::update(Geom::Affine const &affine)
{
if (_affine == affine && !_need_update) {
// Nothing to do.
return;
}
_affine = affine;
_need_update = false;
_bounds = Geom::Rect(); // Zero
// Update all children and calculate new bounds.
for (auto & item : items) {
// We don't need to update what is not visible
if (!item.is_visible()) continue;
item.update(_affine);
_bounds.unionWith(item.get_bounds());
}
}
void CanvasItemGroup::render(Inkscape::CanvasItemBuffer *buf)
{
if (_visible) {
if (_bounds.interiorIntersects(buf->rect)) {
for (auto & item : items) {
item.render(buf);
}
}
}
}
// Return last visible and pickable item that contains point.
// SPCanvasGroup returned distance but it was not used.
CanvasItem* CanvasItemGroup::pick_item(Geom::Point& p)
{
#ifdef CANVAS_ITEM_DEBUG
std::cout << "CanvasItemGroup::pick_item:" << std::endl;
std::cout << " PICKING: In group: " << _name << " bounds: " << _bounds << std::endl;
#endif
for (auto item = items.rbegin(); item != items.rend(); ++item) { // C++20 will allow us to loop in reverse.
#ifdef CANVAS_ITEM_DEBUG
std::cout << " PICKING: Checking: " << item->get_name() << " bounds: " << item->get_bounds() << std::endl;
#endif
CanvasItem* picked_item = nullptr;
if (item->is_visible() &&
item->is_pickable() &&
item->contains(p) ) {
auto group = dynamic_cast<CanvasItemGroup *>(&*item);
if (group) {
picked_item = group->pick_item(p);
} else {
picked_item = &*item;
}
}
if (picked_item != nullptr) {
#ifdef CANVAS_ITEM_DEBUG
std::cout << " PICKING: pick_item: " << picked_item->get_name() << std::endl;
#endif
return picked_item;
}
}
return nullptr;
}
void CanvasItemGroup::update_canvas_item_ctrl_sizes(int size_index)
{
for (auto & item : items) {
auto ctrl = dynamic_cast<CanvasItemCtrl *>(&item);
if (ctrl) {
// We can't use set_size_default as the preference file is updated ->after<- the signal is emitted!
ctrl->set_size_via_index(size_index);
}
auto group = dynamic_cast<CanvasItemGroup *>(&item);
if (group) {
group->update_canvas_item_ctrl_sizes(size_index);
}
}
}
} // Namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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