overlay.cxx

#include "overlay.h"
 
namespace cgv {
namespace app {
 
void overlay::on_visibility_change() {
    update_member(&(cgv::render::drawable::active));
    post_redraw();
}
 
void overlay::on_layout_change() {
    update_layout();
    post_redraw();
}
 
bool overlay::handle(cgv::gui::event& e) {
    if(!cgv::render::drawable::active)
        return false;
 
    switch(e.get_kind()) {
    case cgv::gui::EID_KEY:
        return handle_key_event(dynamic_cast<cgv::gui::key_event&>(e));
    case cgv::gui::EID_MOUSE:
    {
        cgv::gui::mouse_event& me = dynamic_cast<cgv::gui::mouse_event&>(e);
        ivec2 local_mouse_pos = get_local_mouse_pos({ me.get_x(), me.get_y() });
 
        cgv::g2d::irect local_rect = get_local_rectangle();
        bool mouse_is_over_overlay = local_rect.contains(local_mouse_pos);
 
        cgv::gui::MouseAction action = me.get_action();
 
        if(action == cgv::gui::MA_MOVE && local_mouse_pos != last_local_mouse_pos_) {
            bool mouse_was_over_overlay = local_rect.contains(last_local_mouse_pos_);
 
            last_local_mouse_pos_ = local_mouse_pos;
 
            if(!mouse_was_over_overlay && mouse_is_over_overlay)
                me.set_action(cgv::gui::MA_ENTER);
            else if(mouse_was_over_overlay && !mouse_is_over_overlay)
                me.set_action(cgv::gui::MA_LEAVE);
 
            bool handled = handle_mouse_event(me, local_mouse_pos);
            me.set_action(action);
        }
 
        switch(action) {
        case cgv::gui::MA_PRESS:
            captured_mouse_ = mouse_is_over_overlay;
            break;
        case cgv::gui::MA_RELEASE:
            captured_mouse_ = false;
            break;
        case cgv::gui::MA_WHEEL:
            return mouse_is_over_overlay;
        default:
            break;
        }
 
        if((mouse_is_over_overlay || captured_mouse_) && handle_mouse_event(me, local_mouse_pos))
            return true;
 
        if(captured_mouse_ && blocks_events_)
            return true;
    }
    default:
        break;
    }
 
    return false;
}
 
void overlay::on_set(void* member_ptr) {
    handle_member_change(cgv::utils::pointer_test(member_ptr));
    update_member(member_ptr);
    post_redraw();
}
 
ivec2 overlay::get_local_mouse_pos(ivec2 mouse_pos) const {
    return cgv::g2d::apply_origin_setting(mouse_pos, last_viewport_size_, cgv::g2d::OriginSetting::kUpperLeft, cgv::g2d::OriginSetting::kLowerLeft) - container_.position;
}
 
void overlay::set_alignment(AlignmentOption horizontal, AlignmentOption vertical, vec2 percentual_offset) {
    horizontal_alignment_ = horizontal;
    vertical_alignment_ = vertical;
    
    for(int i = 0; i < 2; ++i) {
        if(percentual_offset[i] != -1.0f)
            percentual_offset_[i] = percentual_offset[i];
    }
 
    on_layout_change();
}
 
void overlay::set_stretch(StretchOption stretch, vec2 percentual_size) {
    stretch_ = stretch;
 
    for(int i = 0; i < 2; ++i) {
        if(percentual_size[i] != -1.0f)
            percentual_size_[i] = percentual_size[i];
    }
 
    on_layout_change();
}
 
void overlay::set_margin(const ivec2& margin) {
    margin_ = margin;
    on_layout_change();
}
 
void overlay::set_size(const ivec2& size) {
    container_.size = size;
    on_layout_change();
}
 
void overlay::set_visibility(bool visible) {
    if(visible)
        show();
    else
        hide();
    on_visibility_change();
}
 
void overlay::toggle_visibility() {
    set_visibility(!is_visible());
}
 
bool overlay::ensure_viewport(cgv::render::context& ctx) {
    ivec2 viewport_size(ctx.get_width(), ctx.get_height());
    if(last_viewport_size_ != viewport_size) {
        last_viewport_size_ = viewport_size;
        update_layout();
        return true;
    }
    return false;
}
 
bool overlay::ensure_layout(cgv::render::context& ctx) {
    bool ret = ensure_viewport(ctx);
 
    if(last_size_ != container_.size) {
        last_size_ = container_.size;
        ret = true;
    }
 
    return ret;
}
 
bool overlay::is_hit(const ivec2& mouse_pos) const {
    ivec2 test_pos = cgv::g2d::apply_origin_setting(mouse_pos, last_viewport_size_, cgv::g2d::OriginSetting::kUpperLeft, cgv::g2d::OriginSetting::kLowerLeft);
    return container_.contains(test_pos);
};
 
bool overlay::begin_overlay_gui() {
    bool node_is_open = begin_tree_node_void(gui_options.heading != "" ? gui_options.heading : name, &name, -1, false, "level=2;options='w=160';align=''");
 
    add_layout_member_control("Show", cgv::render::drawable::active, "toggle", "w=40");
 
    if(node_is_open) {
        align("\a");
        return true;
    }
 
    return false;
}
 
void overlay::end_overlay_gui() {
    align("\b");
    end_tree_node(name);
}
 
void overlay::create_layout_gui() {
    if(!gui_options.show_layout_options)
        return;
 
    if(!gui_options.allow_alignment && !gui_options.allow_stretch && !gui_options.allow_margin)
        return;
 
    if(begin_tree_node("Layout", gui_options, false)) {
        align("\a");
 
        if(gui_options.allow_alignment) {
            add_decorator("Alignment", "heading", "level=4", "%y-=8\n");
 
            add_decorator("Horizontal", "heading", "level=4;font_style=regular;w=94", " ");
            add_decorator("Vertical", "heading", "level=4;font_style=regular;w=94");
 
            add_layout_member_control("", horizontal_alignment_, "dropdown", "enums='Free,Left,Center,Right';w=94", " ");
            add_layout_member_control("", vertical_alignment_, "dropdown", "enums='Free=0,Top=3,Center=2,Bottom=1';w=94");
        }
 
        if(gui_options.allow_stretch)
            add_layout_member_control("Stretch", stretch_, "dropdown", "enums='None,Horizontal,Vertical,Both'");
 
        if(gui_options.allow_margin) {
            add_layout_member_control("Margin", margin_[0], "value", "w=94;min=-10000;max=10000;step=1;", " ");
            add_layout_member_control("", margin_[1], "value", "w=94;min=-10000;max=10000;step=1;");
        }
 
        align("\b");
        end_tree_node(gui_options);
    }
}
 
void overlay::create_gui() {
    if(gui_options.create_default_tree_node) {
        if(begin_overlay_gui()) {
            create_layout_gui();
            create_gui_impl();
            end_overlay_gui();
        }
    } else {
        create_layout_gui();
        create_gui_impl();
    }
}
 
void overlay::update_layout() {
    container_.position = margin_;
    ivec2 max_size = last_viewport_size_ - 2 * margin_;
 
    switch(stretch_) {
    case SO_HORIZONTAL:
        container_.w() = max_size.x();
        break;
    case SO_VERTICAL:
        container_.h() = max_size.y();
        break;
    case SO_BOTH:
        container_.size = max_size;
        break;
    case SO_PERCENTUAL:
        container_.size = percentual_size_ * max_size;
        break;
    default:
        break;
    }
 
    const auto compute_aligned_position = [this, &max_size](AlignmentOption alignment, int axis) {
        switch(alignment) {
        case AO_CENTER: return (last_viewport_size_[axis] - container_.size[axis]) / 2;
        case AO_END: return last_viewport_size_[axis] - container_.size[axis] - margin_[axis];
        case AO_PERCENTUAL: return static_cast<int32_t>(margin_[axis] + percentual_offset_[axis] * max_size[axis]);
        case AO_START:
        case AO_FREE:
        default: return margin_[axis];
        }
    };
 
    container_.x() = compute_aligned_position(horizontal_alignment_, 0);
    container_.y() = compute_aligned_position(vertical_alignment_, 1);
}
 
}
}