Resize list widgets to the list width for vertical lists

1 files changed, 17 insertions, 4 deletions

diff --git a/src/mgui/button.c b/src/mgui/button.c
index c6b65d5..b548140 100644
--- a/src/mgui/button.c
+++ b/src/mgui/button.c
@@ -13,6 +13,7 @@ mgui_button* mgui_button_create() {
     button->background.size = (mgl_vec2f){ 0.0f, 0.0f };
     button->background.color = (mgl_color){ 45, 45, 45, 255 };
     mgl_text_init(&button->label, mgui_get_font(MGUI_FONT_LATIN, 32), "Label", 5);
+    button->background.size = mgl_text_get_bounds(&button->label);
     return button;
 }
 
@@ -26,9 +27,22 @@ mgui_button* mgui_widget_to_button(mgui_widget *widget) {
 }
 
 void mgui_button_set_position(mgui_button *self, mgl_vec2i position) {
-    const mgl_vec2f position_f = (mgl_vec2f){ position.x, position.y };
-    self->background.position = position_f;
-    mgl_text_set_position(&self->label, position_f);
+    const mgl_vec2f label_bounds = mgl_text_get_bounds(&self->label);
+    self->background.position = (mgl_vec2f){ position.x, position.y };
+    mgl_text_set_position(&self->label, (mgl_vec2f){
+        (int)(self->background.position.x + self->background.size.x * 0.5f - label_bounds.x * 0.5f),
+        (int)(self->background.position.y + self->background.size.y * 0.5f - label_bounds.y * 0.5f)
+    });
+}
+
+static int max_int(int a, int b) {
+    return a >= b ? a : b;
+}
+
+void mgui_button_set_width(mgui_button *self, int width) {
+    mgl_vec2f label_bounds = mgl_text_get_bounds(&self->label);
+    self->background.size.x = max_int(label_bounds.x, width);
+    mgui_button_set_position(self, (mgl_vec2i){ self->background.position.x, self->background.position.y });
 }
 
 void mgui_button_on_event(mgui_button *self, mgl_window *window, mgl_event *event) {
@@ -49,7 +63,6 @@ void mgui_button_on_event(mgui_button *self, mgl_window *window, mgl_event *even
 
 mgl_vec2i mgui_button_draw(mgui_button *self, mgl_window *window) {
     (void)window;
-    self->background.size = mgl_text_get_bounds(&self->label);
     mgl_rectangle_draw(mgl_get_context(), &self->background);
     mgl_text_draw(mgl_get_context(), &self->label);
     return (mgl_vec2i){ self->background.size.x, self->background.size.y };