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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.
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;
// 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)))
return false;
}
// Process widgets by visibility (backwards)
return widgets.for_each_reverse([selected_widget, &event, &window](std::unique_ptr<Widget> &widget) {
// Ignore offset because widgets are positioned with offset in ::draw, this solution is simpler
if(widget.get() != selected_widget) {
if(!widget->on_event(event, window, mgl::vec2f(0.0f, 0.0f)))
return false;
}
return true;
});
}
void List::draw(mgl::Window &window, mgl::vec2f offset) {
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 float spacing = floor(spacing_scale * get_theme().window_height);
switch(orientation) {
case Orientation::VERTICAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
if(i > 0)
draw_pos.y += spacing;
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;
}
break;
}
case Orientation::HORIZONTAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
if(i > 0)
draw_pos.x += spacing;
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;
}
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;
widgets.push_back(std::move(widget));
}
void List::remove_widget(Widget *widget) {
widgets.remove(widget);
}
void List::clear() {
widgets.clear();
}
void List::for_each_child_widget(std::function<bool(std::unique_ptr<Widget> &widget)> callback) {
widgets.for_each(callback);
}
Widget* List::get_child_widget_by_index(size_t index) const {
if(index < widgets.size())
return widgets[index].get();
else
return nullptr;
}
void List::set_spacing(float spacing) {
spacing_scale = spacing;
}
// TODO: Cache result
mgl::vec2f List::get_size() {
if(!visible)
return {0.0f, 0.0f};
mgl::vec2f size;
const float spacing = floor(spacing_scale * get_theme().window_height);
switch(orientation) {
case Orientation::VERTICAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
if(i > 0)
size.y += spacing;
const auto widget_size = widget->get_size();
size.x = std::max(size.x, widget_size.x);
size.y += widget_size.y;
}
break;
}
case Orientation::HORIZONTAL: {
for(size_t i = 0; i < widgets.size(); ++i) {
auto &widget = widgets[i];
if(!widget->visible)
continue;
if(i > 0)
size.x += spacing;
const auto widget_size = widget->get_size();
size.x += widget_size.x;
size.y = std::max(size.y, widget_size.y);
}
break;
}
}
return size;
}
}
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