Treeview: Add expand / close for treeviews

Author: kimkulling

samples/main.cpp

@@ -108,7 +108,6 @@ int main(int argc, char *argv[]) {
     Widgets::treeView(10, RootPanelId, "tree", Rect(100, 400, 100, 40));
     Widgets::treeItem(11, 10, "Item 1");
     Widgets::treeItem(12, 10, "Item 2");
-    Widgets::setEnableState(12, false);
 
     while (TinyUi::run()) {
         TinyUi::render();

src/widgets.cpp

@@ -347,6 +347,17 @@ ret_code Widgets::panel(Id id, Id parentId, const char *title, const Rect &rect,
 }
 
 static int onTreeViewItemClicked(uint32_t id, void *data) {
+    Widget *treeView = Widgets::findWidget(id, TinyUi::getContext().mRoot);
+    if (treeView == nullptr) {
+        return ErrorCode;
+    }
+    for (size_t i = 0; i < treeView->mChildren.size(); ++i ) {
+        Widget *child = treeView->mChildren[i];
+        if (child == nullptr) {
+            continue;
+        }
+        child->mEnabled = !child->mEnabled;
+    }
     std::cout << "TreeView item clicked: " << id << std::endl;
     return 0;
 }