ui improvements

src/framework/ui/uicontainer.cpp

@@ -45,11 +45,23 @@ void UIContainer::addChild(UIElementPtr child)
 
 void UIContainer::removeChild(UIElementPtr child)
 {
+    // first check if its really a child
+    bool removed = false;
+    for(auto it = m_children.begin(); it != m_children.end(); ++it) {
+        if((*it) == child) {
+            removed = true;
+            m_children.erase(it);
+            break;
+        }
+    }
+    assert(removed);
+
     if(m_focusedElement == child)
         setFocusedElement(UIElementPtr());
-    m_children.remove(child);
-    if(child->getParent() == shared_from_this())
-        child->setParent(UIContainerPtr());
+
+    // child must have this container as parent
+    assert(child->getParent() == asUIContainer());
+    child->setParent(UIContainerPtr());
 }
 
 UIElementPtr UIContainer::getChildById(const std::string& id)
@@ -57,9 +69,8 @@ UIElementPtr UIContainer::getChildById(const std::string& id)
     if(getId() == id)
         return asUIElement();
     for(auto it = m_children.begin(); it != m_children.end(); ++it) {
-        if((*it)->getId() == id) {
+        if((*it)->getId() == id)
             return (*it);
-        }
     }
     return UIElementPtr();
 }
@@ -98,6 +109,7 @@ void UIContainer::render()
 
 void UIContainer::onInputEvent(const InputEvent& event)
 {
+    UIElementPtr focusedElement = m_focusedElement;
     for(auto it = m_children.begin(); it != m_children.end(); ++it) {
         const UIElementPtr& child = (*it);
         bool shouldFire = false;
@@ -106,7 +118,7 @@ void UIContainer::onInputEvent(const InputEvent& event)
         if(child->isEnabled() && child->isVisible()) {
             if(event.type & EV_KEYBOARD) {
                 // keyboard events only go to focused elements or containers
-                if(child->asUIContainer() || child == getFocusedElement()) {
+                if(child->asUIContainer() || child == focusedElement) {
                     shouldFire = true;
                 }
             // mouse events
@@ -130,13 +142,69 @@ void UIContainer::onInputEvent(const InputEvent& event)
     }
 }
 
+void UIContainer::focusNextElement()
+{
+    UIElementPtr element;
+    auto focusedIt = std::find(m_children.begin(), m_children.end(), m_focusedElement);
+    if(focusedIt != m_children.end()) {
+        for(auto it = ++focusedIt; it != m_children.end(); ++it) {
+            const UIElementPtr& child = (*it);
+            if(child->isFocusable()) {
+                element = child;
+                break;
+            }
+        }
+    }
+    if(!element) {
+        for(auto it = m_children.begin(); it != m_children.end(); ++it) {
+            const UIElementPtr& child = (*it);
+            if(child->isFocusable()) {
+                element = child;
+                break;
+            }
+        }
+    }
+    if(element)
+        setFocusedElement(element);
+}
+
 void UIContainer::setFocusedElement(UIElementPtr focusedElement)
 {
-    if(m_focusedElement) {
-        m_focusedElement->setFocused(false);
+    if(focusedElement != m_focusedElement) {
+        if(m_focusedElement) {
+            m_focusedElement->setFocused(false);
+            m_focusedElement->onFocusChange();
+        }
+        m_focusedElement = focusedElement;
+        m_focusedElement->setFocused(true);
         m_focusedElement->onFocusChange();
     }
-    m_focusedElement = focusedElement;
-    m_focusedElement->setFocused(true);
-    m_focusedElement->onFocusChange();
+}
+
+bool UIContainer::lockElement(UIElementPtr element)
+{
+    bool found = false;
+    for(auto it = m_children.begin(); it != m_children.end(); ++it) {
+        if((*it) == element) {
+            (*it)->setEnabled(true);
+            found = true;
+            break;
+        }
+    }
+
+    if(found) {
+        for(auto it = m_children.begin(); it != m_children.end(); ++it) {
+            if((*it) != element)
+                (*it)->setEnabled(false);
+        }
+        return true;
+    }
+    return false;
+}
+
+void UIContainer::unlockElement()
+{
+    for(auto it = m_children.begin(); it != m_children.end(); ++it) {
+        (*it)->setEnabled(true);
+    }
 }

src/framework/ui/uicontainer.h

@@ -31,25 +31,38 @@
 class UIContainer : public UIElement
 {
 public:
-    UIContainer(UI::EElementType type = UI::Container) : UIElement(type) { }
+    UIContainer(UI::EElementType type = UI::Container) :
+        UIElement(type) { }
     virtual ~UIContainer() { }
 
     virtual void render();
     virtual void onInputEvent(const InputEvent& event);
 
+    /// Add an element, this must never be called from events loops
     void addChild(UIElementPtr child);
+    /// Remove an element, this must never be called from events loops
     void removeChild(UIElementPtr child);
+    /// Find an element in this container by id
     UIElementPtr getChildById(const std::string& id);
-
+    /// Find an element in this container and in its children by id
     UIElementPtr recursiveGetChildById(const std::string& id);
 
+    /// Disable all children except the specified element
+    bool lockElement(UIElementPtr element);
+    /// Renable all children
+    void unlockElement();
+
+    /// Focus next element
+    void focusNextElement();
+    /// Focus element
     void setFocusedElement(UIElementPtr focusedElement);
+    /// Get focused element
     UIElementPtr getFocusedElement() const { return m_focusedElement; }
 
     virtual UI::EElementType getElementType() const { return UI::Container; }
-
     UIContainerPtr asUIContainer() { return boost::static_pointer_cast<UIContainer>(shared_from_this()); }
 
+    /// Get root container (the container that contains everything)
     static UIContainerPtr& getRootContainer();
 
 private:

src/framework/ui/uielement.cpp

@@ -26,6 +26,7 @@
 #include "uiskins.h"
 #include "uielementskin.h"
 #include "graphics/graphics.h"
+#include <core/dispatcher.h>
 
 UIElement::UIElement(UI::EElementType type) :
     UILayout(),
@@ -38,6 +39,16 @@ UIElement::UIElement(UI::EElementType type) :
 
 }
 
+void UIElement::destroy()
+{
+    // we must always have a parent when destroying
+    assert(getParent());
+    // we cant delete now, as this call maybe in a event loop
+    g_dispatcher.addTask(boost::bind(&UIContainer::removeChild, getParent(), asUIContainer()));
+    // shared ptr must have 4 refs, (this + removeChild callback + parent + use_count call)
+    assert(asUIElement().use_count() == 4);
+}
+
 bool UIElement::setSkin(const std::string& skinName)
 {
     setSkin(g_uiSkins.getElementSkin(m_type, skinName));
@@ -49,7 +60,7 @@ void UIElement::setSkin(UIElementSkin* skin)
     m_skin = skin;
     if(skin && !getRect().isValid()) {
         setSize(skin->getDefaultSize());
-        skin->onSkinApply(this);
+        skin->apply(this);
     }
 }
 

src/framework/ui/uielement.h

@@ -46,7 +46,13 @@ public:
     UIElement(UI::EElementType type = UI::Element);
     virtual ~UIElement() { }
 
+    /// Destroy this element by removing it from its parent
+    void destroy();
+
+    /// Draw element
     virtual void render();
+
+    // events
     virtual void onInputEvent(const InputEvent& event) { }
     virtual void onFocusChange() { }
 

src/framework/ui/uielementskin.h

@@ -40,7 +40,7 @@ public:
     virtual ~UIElementSkin() { }
 
     virtual void load(const YAML::Node& node);
-    virtual void onSkinApply(UIElement *element) { }
+    virtual void apply(UIElement *element) { }
     virtual void draw(UIElement *element);
 
     const std::string& getName() const { return m_name; }

src/framework/ui/uilayout.cpp

@@ -106,7 +106,7 @@ void UILayout::addAnchoredElement(UILayoutPtr anchoredElement)
         }
     }
 
-    // if not anchor it
+    // if not, anchor it
     if(!found)
         m_anchoredElements.push_back(anchoredElement);
 }

src/framework/ui/uitextedit.cpp

@@ -25,6 +25,7 @@
 #include "uitextedit.h"
 #include "uitexteditskin.h"
 #include "graphics/fonts.h"
+#include "uicontainer.h"
 
 UITextEdit::UITextEdit() :
     UIElement(UI::TextEdit)
@@ -37,18 +38,20 @@ void UITextEdit::onInputEvent(const InputEvent& event)
     if(event.type == EV_TEXT_ENTER) {
         m_textArea.appendCharacter(event.keychar);
     } else if(event.type == EV_KEY_DOWN) {
-        if(event.keycode == KC_DELETE)
+        if(event.keycode == KC_DELETE) // erase right character
             m_textArea.removeCharacter(true);
-        else if(event.keycode == KC_BACK)
+        else if(event.keycode == KC_BACK) // erase left character
             m_textArea.removeCharacter(false);
-        else if(event.keycode == KC_RIGHT)
+        else if(event.keycode == KC_RIGHT) // move cursor right
             m_textArea.moveCursor(true);
-        else if(event.keycode == KC_LEFT)
+        else if(event.keycode == KC_LEFT) // move cursor left
             m_textArea.moveCursor(false);
-        else if(event.keycode == KC_HOME)
+        else if(event.keycode == KC_HOME) // move cursor to first character
             m_textArea.setCursorPos(0);
-        else if(event.keycode == KC_END)
+        else if(event.keycode == KC_END) // move cursor to last character
             m_textArea.setCursorPos(m_textArea.getText().length());
+        else if(event.keycode == KC_TAB) // focus next parent element
+            getParent()->focusNextElement();
     } else if(event.type == EV_MOUSE_LDOWN) {
 
     } else if(event.type == EV_MOUSE_LUP && getRect().contains(event.mousePos)) {

src/framework/ui/uitexteditskin.cpp

@@ -46,7 +46,7 @@ void UITextEditSkin::load(const YAML::Node& node)
         m_textMargin = 2;
 }
 
-void UITextEditSkin::onSkinApply(UIElement* element)
+void UITextEditSkin::apply(UIElement* element)
 {
     UITextEdit *textEdit = static_cast<UITextEdit*>(element);
     textEdit->getTextArea().setFont(m_font);

src/framework/ui/uitexteditskin.h

@@ -38,7 +38,7 @@ public:
         UIElementSkin(name, UI::TextEdit) { }
 
     void load(const YAML::Node& node);
-    void onSkinApply(UIElement *element);
+    void apply(UIElement *element);
     void draw(UIElement *element);
 
     Font *getFont() const { return m_font; }