add an property to widgets to make them omit layout...

and add on_event function pointer that users can set on any widgets to
act upon various events manually

.gitignore

@@ -1,3 +1,5 @@
 builddir/
+buildclang/
+releaseclang/
 .cache/
 compile_commands.json

src/DocumentLayout.cpp

@@ -14,6 +14,9 @@ void DocumentLayout::run() {
     auto& children = m_target->children();
 
     for (auto& child : children) {
+        if (child->absolute())
+            continue;
+
         if (child->current_geometry().height() > largest_height_so_far) {
             largest_height_so_far = child->current_geometry().height();
         }

src/Widget.cpp

@@ -221,6 +221,8 @@ void Widget::dispatch_event(Event &event) {
     if (!m_accepts_events)
         return;
 
+    on_event(event);
+
     switch (event.type()) {
         case EventType::MouseMove: {
             handle_mouse_move_event(reinterpret_cast<MouseMoveEvent&>(event));

src/Widget.hpp

@@ -4,6 +4,7 @@
 #include <utility>
 #include <vector>
 #include <string>
+#include <functional>
 #include "Box.hpp" 
 #include "Events.hpp"
 #include "Forward.hpp"
@@ -44,6 +45,7 @@ private:
     bool m_is_active { false };
     bool m_consumes_hits { false };
     bool m_accepts_events { true };
+    bool m_absolute { false };
     ControlWidgetType m_control_type { ControlWidgetType::Widget };
 public:
     Widget() {}
@@ -58,6 +60,8 @@ public:
             m_accepts_events = false;
         }
 
+    std::function<void(Event&)> on_event { [](Event&){} };
+
     Box &current_geometry() { return m_current_geometry; }
     void set_current_geometry(Box current_geometry) { m_current_geometry = current_geometry; wants_full_relayout(); }
     void set_current_geometry(Box current_geometry, bool is_pure) { m_current_geometry = current_geometry; if (!is_pure) { wants_full_relayout(); } }
@@ -94,6 +98,9 @@ public:
     bool accepts_events() { return m_accepts_events; }
     void set_accepts_events(bool accepts_events) { m_accepts_events = accepts_events; }
 
+    bool absolute() { return m_absolute; }
+    void set_absolute(bool absolute) { m_absolute = absolute; } 
+
     void set_layout(std::shared_ptr<Layout> layout);
     std::shared_ptr<Layout> layout() { return m_layout; }
 

src/Window.hpp

@@ -6,6 +6,7 @@
 #include "Painter.hpp"
 #include <X11/Xlib.h>
 #include <cairomm/xlib_surface.h>
+#include <functional>
 
 namespace Raven {
 

src/main.cpp

@@ -6,6 +6,7 @@
 #include "Label.hpp"
 #include "Layout.hpp"
 #include "src/DocumentLayout.hpp"
+#include "src/Events.hpp"
 #include <iostream>
 #include <memory>
 #include <string>
@@ -17,25 +18,23 @@ int main() {
     auto main_widget = window.set_main_widget<Raven::Widget>();
     main_widget->set_layout<Raven::DocumentLayout>(6.0);
 
-    int number = 0;
+    // int number = 0;
+    bool is_dragging = false;
 
-    for (int i = 0; i < 500; i++) {
-        auto button = main_widget->add<Raven::Label>("text    ");
-        /*
+    auto button = main_widget->add<Raven::Button>("hello");
+    button->set_absolute(true);
     button->on_click = [&]() {
-            number++;
-
-            window.start_batch();
-            for (auto& c : main_widget->children()) {
-                if (c->type() == Raven::WidgetType::Button) {
-                    auto button_child = std::static_pointer_cast<Raven::Button>(c);
-                    button_child->set_text(std::to_string(number));
-                }
-            }
-            window.end_batch();
+        is_dragging = !is_dragging;
     };
-        */
+
+    main_widget->on_event = [&](Raven::Event &event) {
+        if (event.type() == Raven::EventType::MouseMove) {
+            auto mouse_move = reinterpret_cast<Raven::MouseMoveEvent&>(event);
+            if (is_dragging) {
+                button->move_to(mouse_move.point().x(), mouse_move.point().y());
             }
+        }
+    };
 
     window.run(true);
     return 0;