layers control

data/layout.xml

@@ -320,7 +320,7 @@
             <!--Brushes-->
             <panel-brushes id="panel-brushes"></panel-brushes>
             <!--Layers-->
-            <panel-layers></panel-layers>
+            <panel-layers id="panel-layers"></panel-layers>
           </border>
         </node>
         <!-- content panel -->

engine/app.cpp

@@ -154,6 +154,7 @@ void App::initLayout()
         LOG("initializing layout components");
         sidebar = layout[main_id]->find<NodeBorder>("sidebar");
         brushes = layout[main_id]->find<NodePanelBrushes>("panel-brushes");
+        layers = layout[main_id]->find<NodePanelLayers>("panel-layers");
         if (auto* button = layout[main_id]->find<NodeButton>("btn-close"))
         {
             button->on_click = [](Node*) { exit(0); };

engine/app.h

@@ -21,6 +21,7 @@ public:
     NodePopupMenu* menu_layers = nullptr;
     NodeBorder* sidebar = nullptr;
     NodePanelBrushes* brushes;
+    NodePanelLayers* layers;
     const uint16_t main_id = const_hash("main");
     float width;
     float height;

engine/layout.h

@@ -1172,7 +1172,11 @@ class NodePanelLayers : public Node
     NodeButtonCustom* btn_remove;
     NodeButtonCustom* btn_up;
     NodeButtonCustom* btn_down;
+    int id_counter = 0;
 public:
+    std::function<void(Node* target, int old_idx, int new_idx)> on_layer_change;
+    std::function<void(Node* target, int index)> on_layer_delete;
+    std::function<void(Node* target)> on_layer_add;
     NodeLayer* m_current_layer = nullptr;
     std::vector<NodeLayer*> m_layers;
     NodeBorder* m_layers_container;
@@ -1181,11 +1185,9 @@ public:
     {
         init_template("tpl-panel-layers");
         m_layers_container = find<NodeBorder>("layers-container");
-        for (int i = 0; i < 5; i++)
+        for (int i = 0; i < 1; i++)
         {
-            static char s[64];
+            add_layer();
-            sprintf(s, "Layer-%d", i);
-            add_layer(s);
         }
         m_current_layer = m_layers[0];
         m_layers[0]->m_selected = true;
@@ -1193,20 +1195,26 @@ public:
         btn_remove = find<NodeButtonCustom>("btn-remove");
         btn_up = find<NodeButtonCustom>("btn-up");
         btn_down = find<NodeButtonCustom>("btn-down");
-        btn_add->on_click = [this](Node*) { add_layer("New Layer"); };
+        btn_add->on_click = [this](Node*) { 
+            add_layer(); 
+        };
         btn_remove->on_click = [this](Node*) {
             if (m_layers.size() == 1)
                 return; // dont' delete the last layer
-            auto it = std::find(m_layers.begin(), m_layers.end(), m_current_layer);
+            remove_layer(m_current_layer);
-            auto i = m_layers_container->get_child_index(m_current_layer);
-            m_layers_container->remove_child(m_current_layer);
-            m_layers.erase(it);
-            i = std::min<int>(i, m_layers.size() - 1);
-            m_current_layer = m_layers[i];
-            m_current_layer->m_selected = true;
         };
-        btn_up->on_click = [this](Node*) { m_layers_container->move_child_offset(m_current_layer, -1); };
+        btn_up->on_click = [this](Node*) { 
-        btn_down->on_click = [this](Node*) { m_layers_container->move_child_offset(m_current_layer, +1); };
+            m_layers_container->move_child_offset(m_current_layer, -1);
+        };
+        btn_down->on_click = [this](Node*) { 
+            m_layers_container->move_child_offset(m_current_layer, +1); 
+        };
+    }
+    void add_layer()
+    {
+        static char s[64];
+        sprintf(s, "Layer-%d", id_counter++);
+        add_layer(s);
     }
     void add_layer(const char* name)
     {
@@ -1218,6 +1226,22 @@ public:
         l->set_name(name);
         l->on_selected = std::bind(&NodePanelLayers::handle_layer_selected, this, std::placeholders::_1);
         m_layers.push_back(l);
+        if (on_layer_add)
+            on_layer_add(this);
+    }
+    void remove_layer(NodeLayer* layer)
+    {
+        auto it = std::find(m_layers.begin(), m_layers.end(), m_current_layer);
+        auto i = m_layers_container->get_child_index(m_current_layer);
+        m_layers_container->remove_child(m_current_layer);
+        m_layers.erase(it);
+        i = std::min<int>(i, m_layers.size() - 1);
+        m_current_layer = m_layers[i];
+        m_current_layer->m_selected = true;
+        if (on_layer_delete)
+            on_layer_delete(this, std::distance(m_layers.begin(), it));
+        if (on_layer_change)
+            on_layer_change(this, -1, i);
     }
     void handle_layer_selected(NodeLayer* target)
     {
@@ -1225,6 +1249,8 @@ public:
             m_current_layer->m_selected = false;
         m_current_layer = target;
         m_current_layer->m_selected = true;
+        if (on_layer_change)
+            on_layer_change(this, -1, m_layers_container->get_child_index(m_current_layer));
     }
 };