Add modal dialog support

1 files changed, 28 insertions, 0 deletions

diff --git a/src/ui/screen.cpp b/src/ui/screen.cpp
index 7ea5e3ce..039d2439 100644
--- a/src/ui/screen.cpp
+++ b/src/ui/screen.cpp
@@ -8,10 +8,38 @@
 
 #include <memory>
 
+#include "core/lv_obj_pos.h"
+#include "core/lv_obj_tree.h"
+#include "misc/lv_area.h"
+#include "misc/lv_color.h"
 #include "widget_top_bar.hpp"
 
 namespace ui {
 
+Screen::Screen()
+    : root_(lv_obj_create(NULL)),
+      content_(lv_obj_create(root_)),
+      modal_content_(lv_obj_create(root_)),
+      group_(lv_group_create()),
+      modal_group_(nullptr) {
+  lv_obj_set_size(root_, lv_pct(100), lv_pct(100));
+  lv_obj_set_size(content_, lv_pct(100), lv_pct(100));
+  lv_obj_set_size(modal_content_, lv_pct(100), lv_pct(100));
+  lv_obj_center(root_);
+  lv_obj_center(content_);
+  lv_obj_center(modal_content_);
+
+  lv_obj_set_style_bg_opa(modal_content_, LV_OPA_TRANSP, 0);
+  lv_obj_set_style_bg_color(modal_content_, lv_color_black(), 0);
+}
+
+Screen::~Screen() {
+  // The group *must* be deleted first. Otherwise, focus events will be
+  // generated whilst deleting the object tree, which causes a big mess.
+  lv_group_del(group_);
+  lv_obj_del(root_);
+}
+
 auto Screen::UpdateTopBar(const widgets::TopBar::State& state) -> void {
   if (top_bar_) {
     top_bar_->Update(state);