libui: Add VerticalLayout

apps/gclient.cpp

@@ -42,7 +42,7 @@ Result<int> luna_main(int argc, char** argv)
     ColorWidget blue(ui::BLUE);
     layout.add_widget(blue);
 
-    ui::HorizontalLayout sublayout(ui::AdjustHeight::No, ui::AdjustWidth::Yes);
+    ui::VerticalLayout sublayout;
     layout.add_widget(sublayout);
 
     ColorWidget red(ui::RED);

libui/include/ui/Layout.h

@@ -42,4 +42,22 @@ namespace ui
         AdjustWidth m_adjust_width;
         int m_used_width;
     };
+
+    class VerticalLayout final : public Widget
+    {
+      public:
+        VerticalLayout(AdjustHeight adjust_height = AdjustHeight::Yes, AdjustWidth adjust_width = AdjustWidth::Yes);
+
+        Result<EventResult> handle_mousemove(Point position) override;
+
+        Result<void> draw(Canvas& canvas) override;
+
+        Result<void> add_widget(Widget& widget);
+
+      private:
+        Vector<Widget*> m_widgets;
+        AdjustHeight m_adjust_height;
+        AdjustWidth m_adjust_width;
+        int m_used_height;
+    };
 }

libui/src/Layout.cpp

@@ -69,4 +69,62 @@ namespace ui
 
         return {};
     }
+
+    VerticalLayout::VerticalLayout(AdjustHeight adjust_height, AdjustWidth adjust_width)
+        : m_adjust_height(adjust_height), m_adjust_width(adjust_width)
+    {
+    }
+
+    Result<EventResult> VerticalLayout::handle_mousemove(Point position)
+    {
+        for (auto widget : m_widgets)
+        {
+            if (widget->rect().contains(position)) return widget->handle_mousemove(position);
+        }
+
+        return ui::EventResult::DidNotHandle;
+    }
+
+    Result<void> VerticalLayout::draw(Canvas& canvas)
+    {
+        for (auto widget : m_widgets)
+        {
+            ui::Rect rect = { m_rect.relative(widget->rect().pos), widget->rect().width, widget->rect().height };
+            auto subcanvas = canvas.subcanvas(rect);
+            TRY(widget->draw(subcanvas));
+        }
+
+        return {};
+    }
+
+    Result<void> VerticalLayout::add_widget(Widget& widget)
+    {
+        TRY(m_widgets.try_append(&widget));
+
+        if (m_adjust_height == AdjustHeight::No)
+        {
+            widget.rect().pos.y = m_rect.pos.y + m_used_height;
+            m_used_height += widget.rect().height;
+        }
+        else
+        {
+            int used_height = 0;
+            div_t result = div(m_rect.height, (int)m_widgets.size());
+            for (auto w : m_widgets)
+            {
+                w->rect().pos.y = m_rect.pos.y + used_height;
+                w->rect().height = result.quot;
+                used_height += result.quot;
+            }
+            m_widgets[m_widgets.size() - 1]->rect().height += result.rem;
+        }
+
+        widget.rect().pos.x = m_rect.pos.x;
+
+        if (m_adjust_width == AdjustWidth::Yes) { widget.rect().width = m_rect.width; }
+
+        widget.set_parent(this);
+
+        return {};
+    }
 }