implement move policy for window moving

modules/core_styles/styles/windows.otui

@@ -5,7 +5,7 @@ Window < UIWindow
   background-color: white
   head height: 20
   head text align: center
-  free move: true
+  move policy: free
   border-image:
     source: /core_styles/images/window.png
     border: 4
@@ -22,8 +22,8 @@ MiniWindow < UIWindow
   margin.top: 6
   margin.left: 6
   margin.right: 6
-  margin.bottom: 6
-  free move: true
+  move policy: free updated
+  focusable: false
   border-image:
     source: /core_styles/images/mini_window.png
     border: 4

src/framework/ui/uiverticallayout.cpp

@@ -32,6 +32,13 @@ void UIVerticalLayout::update()
 {
     UIWidgetPtr parentWidget = getParentWidget();
     UIWidgetList widgets = parentWidget->getChildren();
+
+    // sort by Y center
+    std::sort(widgets.begin(), widgets.end(),
+    [](const UIWidgetPtr& first, const UIWidgetPtr& second) -> bool {
+        return first->getRect().center().y < second->getRect().center().y;
+    });
+
     Point pos = parentWidget->getPosition();
     for(const UIWidgetPtr& widget : widgets) {
         Size size = widget->getSize();

src/framework/ui/uiwindow.cpp

@@ -30,7 +30,7 @@ void UIWindow::setup()
 {
     UIWidget::setup();
     m_moving = false;
-    m_freeMove = false;
+    m_movePolicy = DONT_MOVE;
     m_headHeight = 0;
     m_titleAlign = Fw::AlignCenter;
 }
@@ -70,8 +70,14 @@ void UIWindow::onStyleApply(const OTMLNodePtr& styleNode)
             setTitle(node->value());
         else if(node->tag() == "head text align")
             m_titleAlign = Fw::translateAlignment(node->value());
-        else if(node->tag() == "free move")
-            m_freeMove = node->value<bool>();
+        else if(node->tag() == "move policy") {
+            if(node->value() == "free")
+                m_movePolicy = FREE_MOVE;
+            else if(node->value() == "free updated")
+                m_movePolicy = FREE_UPDATED_MOVE;
+            else
+                m_movePolicy = DONT_MOVE;
+        }
         else if(node->tag() == "onEnter") {
             g_lua.loadFunction(node->value(), "@" + node->source() + "[" + node->tag() + "]");
             luaSetField(node->tag());
@@ -115,7 +121,7 @@ void UIWindow::onFocusChange(bool focused, Fw::FocusReason reason)
 
 bool UIWindow::onMousePress(const Point& mousePos, Fw::MouseButton button)
 {
-    if(m_freeMove) {
+    if(m_movePolicy != DONT_MOVE) {
         UIWidgetPtr clickedChild = getChildByPos(mousePos);
         if(!clickedChild || clickedChild->isPhantom()) {
             m_moving = true;
@@ -138,6 +144,8 @@ bool UIWindow::onMouseMove(const Point& mousePos, const Point& mouseMoved)
 {
     if(m_moving) {
         moveTo(mousePos - m_movingReference);
+        if(m_movePolicy == FREE_UPDATED_MOVE)
+            updateParentLayout();
         return true;
     }
     return UIWidget::onMouseMove(mousePos, mouseMoved);

src/framework/ui/uiwindow.h

@@ -27,6 +27,12 @@
 
 class UIWindow : public UIWidget
 {
+    enum MovePolicy {
+        DONT_MOVE = 0,
+        FREE_MOVE,
+        FREE_UPDATED_MOVE
+    };
+
 public:
     virtual void setup();
     virtual void render();
@@ -46,7 +52,7 @@ protected:
 private:
     std::string m_title;
     bool m_moving;
-    bool m_freeMove;
+    MovePolicy m_movePolicy;
     Point m_movingReference;
 
     // styling