2 files changed, 35 insertions, 2 deletions
diff --git a/include/cru/ui/controls/Control.h b/include/cru/ui/controls/Control.h
index 3293969d..c52a53af 100644
--- a/include/cru/ui/controls/Control.h
+++ b/include/cru/ui/controls/Control.h
@@ -3,6 +3,7 @@
 #include "../events/UiEvents.h"
 #include "../render/RenderObject.h"
 #include "../style/StyleRuleSet.h"
+#include "cru/ui/render/MeasureRequirement.h"
 
 namespace cru::ui::controls {
 
@@ -13,8 +14,7 @@ namespace cru::ui::controls {
  *  - GetRenderObject()
  *  - ForEachChild(const std::function<void(Control*)>& predicate)
  *  - RemoveChild(Control* child)
- * The last two methods are totally for convenient control tree management. The
- * former one is even not used.
+ * The last two methods are totally for convenient control tree management.
  */
 class CRU_UI_API Control : public Object {
   friend class RootControl;
@@ -52,6 +52,13 @@ class CRU_UI_API Control : public Object {
  public:
   virtual render::RenderObject* GetRenderObject() const = 0;
 
+  render::MeasureSize GetPreferredSize() {
+    return GetRenderObject()->GetPreferredSize();
+  }
+  void SetPreferredSize(const render::MeasureSize& size) {
+    GetRenderObject()->SetPreferredSize(size);
+  }
+
   //*************** region: focus ***************
  public:
   bool HasFocus();
diff --git a/include/cru/ui/mapper/style/CheckedConditionMapper.h b/include/cru/ui/mapper/style/CheckedConditionMapper.h
new file mode 100644
index 00000000..d62aba60
--- /dev/null
+++ b/include/cru/ui/mapper/style/CheckedConditionMapper.h
@@ -0,0 +1,26 @@
+#pragma once
+#include "../Mapper.h"
+#include "IConditionMapper.h"
+#include "cru/ui/style/Condition.h"
+
+namespace cru::ui::mapper::style {
+class CRU_UI_API CheckedConditionMapper
+    : public BasicPtrMapper<ui::style::CheckedCondition>,
+      public virtual IConditionMapper {
+ public:
+  CRU_DEFAULT_CONSTRUCTOR_DESTRUCTOR(CheckedConditionMapper)
+
+ public:
+  bool SupportMapFromXml() override { return true; }
+  bool XmlElementIsOfThisType(xml::XmlElementNode* node) override;
+
+  ClonablePtr<ui::style::Condition> MapConditionFromXml(
+      xml::XmlElementNode* node) override {
+    return MapFromXml(node);
+  }
+
+ protected:
+  ClonablePtr<ui::style::CheckedCondition> DoMapFromXml(
+      xml::XmlElementNode* node) override;
+};
+}  // namespace cru::ui::mapper::style