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Tree: expand on RIGHT key, collapse on LEFT key #198

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Merged
RobLoach merged 1 commit into from
May 22, 2026
Merged

Tree: expand on RIGHT key, collapse on LEFT key #198

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30 changes: 29 additions & 1 deletion nuklear_console_tree.h
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Original file line number Diff line number Diff line change
Expand Up @@ -109,6 +109,34 @@ static void nk_console_tree_event_clicked(nk_console* tree, void* user_data) {
nk_console_trigger_event(tree, NK_CONSOLE_EVENT_CHANGED);
}

static struct nk_rect nk_console_tree_render(nk_console* tree) {
if (tree == NULL || tree->data == NULL) {
return nk_rect(0, 0, 0, 0);
}

// Delegate rendering to the button renderer.
struct nk_rect bounds = nk_console_button_render(tree);

// Handle LEFT/RIGHT key presses to collapse/expand when this tree is active.
if (nk_console_is_active_widget(tree)) {
nk_console* top = nk_console_get_top(tree);
nk_console_top_data* top_data = (nk_console_top_data*)top->data;
if (!top_data->input_processed) {
if (nk_console_button_pushed(top, NK_GAMEPAD_BUTTON_RIGHT) && !nk_console_tree_expanded(tree)) {
nk_console_tree_apply_expanded(tree, nk_true);
nk_console_trigger_event(tree, NK_CONSOLE_EVENT_CHANGED);
top_data->input_processed = nk_true;
} else if (nk_console_button_pushed(top, NK_GAMEPAD_BUTTON_LEFT) && nk_console_tree_expanded(tree)) {
nk_console_tree_apply_expanded(tree, nk_false);
nk_console_trigger_event(tree, NK_CONSOLE_EVENT_CHANGED);
top_data->input_processed = nk_true;
}
}
}

return bounds;
}

static void nk_console_tree_event_destroyed(nk_console* tree, void* user_data) {
if (tree == NULL || tree->data == NULL) {
return;
Expand Down Expand Up @@ -161,7 +189,7 @@ NK_API nk_console* nk_console_tree(nk_console* parent, const char* label, nk_boo
widget->data = (void*)data;
widget->selectable = nk_true;
widget->columns = 1;
widget->render = nk_console_button_render;
widget->render = nk_console_tree_render;
data->button.symbol = expanded ? NK_SYMBOL_TRIANGLE_DOWN : NK_SYMBOL_TRIANGLE_RIGHT;
nk_console_add_event(widget, NK_CONSOLE_EVENT_DESTROYED, &nk_console_tree_event_destroyed);
nk_console_add_event(widget, NK_CONSOLE_EVENT_CLICKED, &nk_console_tree_event_clicked);
Expand Down
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