Popup presets panel, fix padding scissor, stacked mouse capture

src/node.cpp

@@ -346,29 +346,71 @@ glm::vec4 Node::get_children_rect() const
     return ret;
 }
 
+bool Node::is_child_recursive(Node* o) const
+{
+    for (const auto& c : m_children)
+    {
+        if (c.get() == o || c->is_child_recursive(o))
+            return true;
+    }
+    return false;
+}
+
 void Node::mouse_capture()
 {
+    auto& c = root()->current_mouse_capture;
+    auto& s = root()->m_capture_stack;
+
     // already owner of capture
-    if (root()->current_mouse_capture == this)
+    if (c == this || std::find(s.begin(), s.end(), this) != s.end())
         return;
-    
-    // cancel previous owner
-    if (auto n = root()->current_mouse_capture)
+
+    if (c)
     {
-        MouseEvent e;
-        e.m_type = kEventType::MouseCancel;
-        n->handle_event(&e);
+        if (c->is_child_recursive(this))
+        {
+            // save on stack
+            s.push_back(c);
+        }
+        else
+        {
+            // cancel previous owner
+            MouseEvent e;
+            e.m_type = kEventType::MouseCancel;
+            c->handle_event(&e);
+
+            // TODO: only delete nodes on a different tree, 
+            // so preserve direct parents of this
+
+            // also clear the whole stack
+            s.clear();
+        }
     }
     
     // make current
-    root()->current_mouse_capture = this;
+    c = this;
     m_mouse_captured = true;
 }
 
 void Node::mouse_release()
 {
-    if (root()->current_mouse_capture == this)
-        root()->current_mouse_capture = nullptr;
+    auto& c = root()->current_mouse_capture;
+    auto& s = root()->m_capture_stack;
+
+    s.erase(std::remove(s.begin(), s.end(), this), s.end());
+    if (c == this)
+    {
+        if (s.empty())
+        {
+            c = nullptr;
+        }
+        else
+        {
+            c = s.back();
+            s.pop_back();
+        }
+    }
+
     m_mouse_captured = false;
 }
 
@@ -646,13 +688,14 @@ void Node::update_internal(const glm::vec2& origin, const glm::mat4& proj)
         // correct the padding clip
         // should not clip the padded area
         // useful to draw decorations
-        float pt = 0;//YGNodeLayoutGetPadding(parent->y_node, YGEdgeTop);
-        float pr = 0;//YGNodeLayoutGetPadding(parent->y_node, YGEdgeRight);
-        float pb = 0;//YGNodeLayoutGetPadding(parent->y_node, YGEdgeBottom);
-        float pl = 0;//YGNodeLayoutGetPadding(parent->y_node, YGEdgeLeft);
+        float pt = YGNodeLayoutGetPadding(parent->y_node, YGEdgeTop);
+        float pr = YGNodeLayoutGetPadding(parent->y_node, YGEdgeRight);
+        float pb = YGNodeLayoutGetPadding(parent->y_node, YGEdgeBottom);
+        float pl = YGNodeLayoutGetPadding(parent->y_node, YGEdgeLeft);
         glm::vec2 off_p(pl, pt);
         glm::vec2 off_s(pr, pb);
-        m_clip_uncut = glm::vec4(m_pos - off_p - glm::vec2(1), m_size + off_p + off_s + glm::vec2(2));
+        glm::vec4 pclip = { xy(parent->m_clip) + off_p, zw(parent->m_clip) - off_s - off_p};
+        m_clip_uncut = glm::vec4(m_pos, m_size);
         m_clip = rect_intersection(m_clip_uncut, parent->m_clip);
     }
     else