HackStudio: Show the edited form widget's widget tree in the tree view

This patch introduces a simple WidgetTreeModel that models the widget
tree inside of a given root GWidget.

1 files changed, 23 insertions, 0 deletions

diff --git a/DevTools/HackStudio/WidgetTreeModel.h b/DevTools/HackStudio/WidgetTreeModel.h
new file mode 100644
index 0000000000..10a81da3fa
--- /dev/null
+++ b/DevTools/HackStudio/WidgetTreeModel.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <LibGUI/GModel.h>
+#include <LibGUI/GPainter.h>
+
+class WidgetTreeModel final : public GModel {
+public:
+    static NonnullRefPtr<WidgetTreeModel> create(GWidget& root) { return adopt(*new WidgetTreeModel(root)); }
+    virtual ~WidgetTreeModel() override;
+
+    virtual int row_count(const GModelIndex& = GModelIndex()) const override;
+    virtual int column_count(const GModelIndex& = GModelIndex()) const override;
+    virtual GVariant data(const GModelIndex&, Role = Role::Display) const override;
+    virtual GModelIndex index(int row, int column, const GModelIndex& parent = GModelIndex()) const override;
+    virtual GModelIndex parent_index(const GModelIndex&) const override;
+    virtual void update() override;
+
+private:
+    explicit WidgetTreeModel(GWidget&);
+
+    NonnullRefPtr<GWidget> m_root;
+    GIcon m_widget_icon;
+};