Resize list widgets to the list width for vertical lists

3 files changed, 59 insertions, 6 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 };
diff --git a/src/mgui/list.c b/src/mgui/list.c
index 320b448..9923c4f 100644
--- a/src/mgui/list.c
+++ b/src/mgui/list.c
@@ -1,12 +1,14 @@
 #include "../../include/mgui/list.h"
 #include "../../include/alloc.h"
+#include <mgl/window/window.h>
 #include <assert.h>
 
-mgui_list* mgui_list_create(mgui_list_direction direction) {
+mgui_list* mgui_list_create(mgui_list_direction direction, mgl_vec2i size) {
     mgui_list *list = mgui_alloc(sizeof(mgui_list));    
     mgui_widget_init(&list->widget, MGUI_WIDGET_LIST);
     list->direction = direction;
     list->position = (mgl_vec2i){ 0, 0 };
+    list->size = size;
     list->items = NULL;
     list->num_items = 0;
     list->items_capacity = 0;
@@ -26,6 +28,22 @@ void mgui_list_set_position(mgui_list *self, mgl_vec2i position) {
     self->position = position;
 }
 
+void mgui_list_set_size(mgui_list *self, mgl_vec2i size) {
+    self->size = size;
+    /* TODO: if direction is horizontal then put the widget in the center of its area */
+    /* TODO: put the widget in the center for vertical as well, for items with a max size */
+    /* TODO: support max size for widgets */
+    if(self->direction == MGUI_LIST_VERTICAL) {
+        for(size_t i = 0; i < self->num_items; ++i) {
+            mgui_widget_set_width(self->items[i], size.x);
+        }
+    }
+}
+
+void mgui_list_set_width(mgui_list *self, int width) {
+    mgui_list_set_size(self, (mgl_vec2i){ width, self->size.y });
+}
+
 static void mgui_list_ensure_capacity(mgui_list *self, size_t new_capacity) {
     if(self->items_capacity >= new_capacity)
         return;
@@ -59,9 +77,19 @@ static int max_int(int a, int b) {
 }
 
 mgl_vec2i mgui_list_draw(mgui_list *self, mgl_window *window) {
-    mgl_vec2i position = self->position;
+    mgl_vec2i position = (mgl_vec2i){ 0, 0 };
+    /* TODO: */
     mgl_vec2i size = (mgl_vec2i){ 0, 0 };
 
+    mgl_view prev_view;
+    mgl_window_get_view(window, &prev_view);
+
+    mgl_view new_view = {
+        .position = { self->position.x, self->position.y },
+        .size = self->size
+    };
+    mgl_window_set_view(window, &new_view);
+
     switch(self->direction) {
         case MGUI_LIST_HORIZONITAL: {
             for(size_t i = 0; i < self->num_items; ++i) {
@@ -85,5 +113,6 @@ mgl_vec2i mgui_list_draw(mgui_list *self, mgl_window *window) {
         }
     }
 
+    mgl_window_set_view(window, &prev_view); /* TODO: Remove */
     return size;
 }
diff --git a/src/mgui/widget.c b/src/mgui/widget.c
index f35ff05..195d253 100644
--- a/src/mgui/widget.c
+++ b/src/mgui/widget.c
@@ -25,6 +25,17 @@ void mgui_widget_set_position(mgui_widget *self, mgl_vec2i position) {
     }
 }
 
+void mgui_widget_set_width(mgui_widget *self, int width) {
+    switch(self->type) {
+        case MGUI_WIDGET_LIST:
+            mgui_list_set_width(mgui_widget_to_list(self), width);
+            break;
+        case MGUI_WIDGET_BUTTON:
+            mgui_button_set_width(mgui_widget_to_button(self), width);
+            break;
+    }
+}
+
 void mgui_widget_on_event(mgui_widget *self, mgl_window *window, mgl_event *event) {
     switch(self->type) {
         case MGUI_WIDGET_LIST: