layouts: margins!

src/Layout.cpp

@@ -6,14 +6,17 @@
 
 namespace Raven {
 
-void Layout::run_on(Widget *target) {
-    Point point { target->get_current_geometry().get_x(), target->get_current_geometry().get_y() };
+void Layout::run() {
+    if (!m_target)
+        return;
+
+    Point point { m_target->get_current_geometry().get_x() + m_margin, m_target->get_current_geometry().get_y() + m_margin };
     double row_largest_height = 0.0;
 
-    auto children = target->get_children();
+    auto children = m_target->get_children();
     for (auto& c : children) {
         if (c->get_control_type() == ControlWidgetType::NewRow && row_largest_height) {
-            point.add(0, row_largest_height);
+            point.add(0, row_largest_height + m_margin);
             row_largest_height = 0.0;
             point.set_x(0);
         }
@@ -22,7 +25,7 @@ void Layout::run_on(Widget *target) {
         }
         auto new_geometry = Box{ point.get_x(), point.get_y(), c->get_current_geometry().get_width(), c->get_current_geometry().get_height() };
         c->set_current_geometry(std::move(new_geometry));
-        point.add(c->get_current_geometry().get_width(), 0);
+        point.add(c->get_current_geometry().get_width() + m_margin, 0);
     }
 }
 

src/Layout.hpp

@@ -5,10 +5,19 @@
 namespace Raven {
 
 class Layout {
+private:
+    double m_margin { 0.0 };
+    Widget *m_target { nullptr };
 public:
     Layout() {}
 
-    void run_on(Widget *target);
+    void run();
+
+    double get_margin() { return m_margin; }
+    void set_margin(double margin) { m_margin = margin; run(); }
+
+    void bind_to(Widget *target) { m_target = target; }
+    Widget *get_target() { return m_target; }
 };
 
 }

src/Widget.cpp

@@ -8,9 +8,13 @@
 namespace Raven {
 
 void Widget::do_layout() {
-    if (m_layout) {
-        m_layout->run_on(this);
+    if (m_layout)
+        m_layout->run();
 }
+
+void Widget::set_layout(Layout *layout) {
+    m_layout = layout;
+    m_layout->bind_to(this);
 }
 
 void Widget::set_window(Window *window) {

src/Widget.hpp

@@ -83,7 +83,7 @@ public:
     bool get_accepts_events() { return m_accepts_events; }
     void set_accepts_events(bool accepts_events) { m_accepts_events = accepts_events; }
 
-    void set_layout(Layout *layout) { m_layout = layout; }
+    void set_layout(Layout *layout);
     Layout *get_layout() { return m_layout; }
 
     WidgetType get_type() { return m_type; }

src/main.cpp

@@ -23,6 +23,8 @@ int main() {
     impostor_button.set_current_geometry(Raven::Box(0, 0, 100, 30));
     label.set_current_geometry(Raven::Box(0, 0, 100, 20));
 
+    main_layout.set_margin(6.0);
+
     main_widget.set_layout(&main_layout);
     window.set_main_widget(&main_widget);