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#include "../../include/gui/List.hpp"
#include "../../include/Theme.hpp"
static float floor(float f) {
return (int)f;
}
namespace gsr {
// TODO: Add homogeneous option, using a specified max size of this list.
static const mgl::vec2f spacing_scale(0.009f, 0.009f);
List::List(Orientation orientation, Alignment content_alignment) : orientation(orientation), content_alignment(content_alignment) {}
bool List::on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f) {
if(!visible)
return true;
inside_event_handler = true;
// We want to store the selected child widget since it can change in the event loop below
Widget *selected_widget = selected_child_widget;
if(selected_widget) {
if(!selected_widget->on_event(event, window, mgl::vec2f(0.0f, 0.0f))) {
inside_event_handler = false;
return false;
}
}
// Process widgets by visibility (backwards)
for(auto it = widgets.rbegin(), end = widgets.rend(); it != end; ++it) {
// Ignore offset because widgets are positioned with offset in ::draw, this solution is simpler
if(it->get() != selected_widget) {
if(!(*it)->on_event(event, window, mgl::vec2f(0.0f, 0.0f))) {
inside_event_handler = false;
return false;
}
}
}
inside_event_handler = false;
return true;
}
// TODO: Maybe call this from main on all widgets instead of from draw
void List::update() {
//widgets.insert(widgets.back(), std::make_move_iterator(add_queue.begin()), std::make_move_iterator(add_queue.end()));
std::move(add_queue.begin(), add_queue.end(), std::back_inserter(widgets));
add_queue.clear();
for(Widget *widget_to_remove : remove_queue) {
remove_widget_immediate(widget_to_remove);
}
remove_queue.clear();
}
void List::remove_widget_immediate(Widget *widget) {
for(auto it = widgets.begin(), end = widgets.end(); it != end; ++it) {
if(it->get() == widget) {
widgets.erase(it);
return;
}
}
}
void List::draw(mgl::Window &window, mgl::vec2f offset) {
update();
if(!visible)
return;
mgl::vec2f draw_pos = position + offset;
offset = {0.0f, 0.0f};
Widget *selected_widget = selected_child_widget;
// TODO: Handle start/end alignment
const mgl::vec2f size = get_size();
const mgl::vec2f parent_inner_size = parent_widget ? parent_widget->get_inner_size() : mgl::vec2f(0.0f, 0.0f);
const mgl::vec2f spacing = (spacing_scale * get_theme().window_height).floor();
switch(orientation) {
case Orientation::VERTICAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
const auto widget_size = widget->get_size();
// TODO: Do this parent widget alignment for horizontal alignment and for other types of widget alignment
// and other widgets.
// Also take this widget alignment into consideration in get_size.
if(widget->get_horizontal_alignment() == Widget::Alignment::CENTER && parent_inner_size.x > 0.001f)
offset.x = floor(parent_inner_size.x * 0.5f - widget_size.x * 0.5f);
else if(content_alignment == Alignment::CENTER)
offset.x = floor(size.x * 0.5f - widget_size.x * 0.5f);
else
offset.x = 0.0f;
widget->set_position(draw_pos + offset);
if(widget.get() != selected_widget)
widget->draw(window, mgl::vec2f(0.0f, 0.0f));
draw_pos.y += widget_size.y;
if(widget_size.y > 0.001f && i + 1 < widgets.size())
draw_pos.y += spacing.y;
}
break;
}
case Orientation::HORIZONTAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
const auto widget_size = widget->get_size();
if(content_alignment == Alignment::CENTER)
offset.y = floor(size.y * 0.5f - widget_size.y * 0.5f);
else
offset.y = 0.0f;
widget->set_position(draw_pos + offset);
if(widget.get() != selected_widget)
widget->draw(window, mgl::vec2f(0.0f, 0.0f));
draw_pos.x += widget_size.x;
if(widget_size.x > 0.001f && i + 1 < widgets.size())
draw_pos.x += spacing.x;
}
break;
}
}
if(selected_widget)
selected_widget->draw(window, mgl::vec2f(0.0f, 0.0f));
}
// void List::remove_child_widget(Widget *widget) {
// for(auto it = widgets.begin(), end = widgets.end(); it != end; ++it) {
// if(it->get() == widget) {
// widgets.erase(it);
// return;
// }
// }
// }
void List::add_widget(std::unique_ptr<Widget> widget) {
widget->parent_widget = this;
if(inside_event_handler)
add_queue.push_back(std::move(widget));
else
widgets.push_back(std::move(widget));
}
void List::remove_widget(Widget *widget) {
for(auto it = add_queue.begin(), end = add_queue.end(); it != end; ++it) {
if(it->get() == widget) {
add_queue.erase(it);
return;
}
}
if(inside_event_handler)
remove_queue.push_back(widget);
else
remove_widget_immediate(widget);
}
const std::vector<std::unique_ptr<Widget>>& List::get_child_widgets() const {
return widgets;
}
Widget* List::get_child_widget_by_index(size_t index) const {
if(index < widgets.size())
return widgets[index].get();
else
return nullptr;
}
// TODO: Cache result
mgl::vec2f List::get_size() {
if(!visible)
return {0.0f, 0.0f};
mgl::vec2f size;
const mgl::vec2f spacing = (spacing_scale * get_theme().window_height).floor();
switch(orientation) {
case Orientation::VERTICAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
const auto widget_size = widget->get_size();
size.x = std::max(size.x, widget_size.x);
size.y += widget_size.y;
if(widget_size.y > 0.001f && i + 1 < widgets.size())
size.y += spacing.y;
}
break;
}
case Orientation::HORIZONTAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
const auto widget_size = widget->get_size();
size.x += widget_size.x;
if(widget_size.x > 0.001f && i + 1 < widgets.size())
size.x += spacing.x;
size.y = std::max(size.y, widget_size.y);
}
break;
}
}
return size;
}
}
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