Prep for image support in windows.

src/ui_elements/CMakeLists.txt

@@ -33,7 +33,7 @@ target_include_directories(ui_elements PUBLIC
                           "${CMAKE_CURRENT_SOURCE_DIR}/ui_events"
                           "${CMAKE_CURRENT_SOURCE_DIR}/desktop_elements"                          
                           )
-target_link_libraries(ui_elements PUBLIC core geometry visual_elements)
+target_link_libraries(ui_elements PUBLIC core geometry visual_elements image)
 
 set_property(TARGET ui_elements PROPERTY FOLDER src)
 

src/ui_elements/desktop_elements/IPlatformWindow.h

@@ -2,10 +2,23 @@
 
 #include <memory>
 
+namespace mt
+{
+    class Screen;
+}
+
 class IPlatformWindow
 {
 public:
     virtual ~IPlatformWindow() = default;
+
+    virtual void show() const = 0;
+
+    virtual void map() const = 0;
+
+    virtual void clear() const = 0;
+
+    virtual void paint(mt::Screen* screen) const = 0;
 };
 
 using IPlatformWindowPtr = std::unique_ptr<IPlatformWindow>;

src/ui_elements/desktop_elements/Window.cpp

@@ -5,6 +5,8 @@
 #include "MouseEvent.h"
 #include "VisualLayer.h"
 #include "KeyboardEvent.h"
+#include "Image.h"
+#include "Screen.h"
 
 namespace mt
 {
@@ -12,6 +14,7 @@ namespace mt
 Window::Window()
     :mWidth(800),
      mHeight(600),
+     mBackingImage(std::make_unique<Image>(mWidth, mHeight)),
      mWidget(Widget::Create())
 {
     mWidget->setBounds(mWidth, mHeight);
@@ -93,4 +96,41 @@ void Window::SetPlatformWindow(IPlatformWindowPtr window)
     mPlatformWindow = std::move(window);
 }
 
+Image* Window::getBackingImage() const
+{
+    return mBackingImage.get();
+}
+
+void Window::map()
+{
+    if (mPlatformWindow)
+    {
+        mPlatformWindow->map();
+    }
+}
+
+void Window::show()
+{
+    if (mPlatformWindow)
+    {
+        mPlatformWindow->show();
+    }
+}
+
+void Window::doPaint(mt::Screen* screen)
+{
+    if (mPlatformWindow)
+    {
+        mPlatformWindow->paint(screen);
+    }
+}
+
+void Window::clear()
+{
+    if (mPlatformWindow)
+    {
+        mPlatformWindow->clear();
+    }
+}
+
 }

src/ui_elements/desktop_elements/Window.h

@@ -9,12 +9,15 @@ class PaintEvent;
 class MouseEvent;
 class KeyboardEvent;
 class VisualLayer;
+class Image;
 class IPlatformWindow;
 using IPlatformWindowPtr = std::unique_ptr<IPlatformWindow>;
 
 namespace mt
 {
 
+class Screen;
+
 class Window
 {
 
@@ -48,12 +51,23 @@ public:
 
     void SetPlatformWindow(IPlatformWindowPtr window);
 
+    Image* getBackingImage() const;
+
+    void map();
+
+    void show();
+
+    void doPaint(mt::Screen* screen);
+
+    void clear();
+
 private:
     int mHandle {-1};
     WidgetUPtr mWidget {nullptr};
     unsigned mWidth {800};
     unsigned mHeight {600};
     IPlatformWindowPtr mPlatformWindow {nullptr};
+    std::unique_ptr<Image> mBackingImage;
 };
 }