Jeck - [JGE recompile needed] Shop cleanup, Interface enhancements.

Added basic transition system that works with GameApp's phases. Currently does a fade-out between elements, which works well in some places and not-so-well in others. We'll definitely want to think about where and where not to use it... they'd work a lot better if we could spawn a thread to handle loading the next state while transitioning.

Also cleaned up the shop a bit, so it uses ReadButton() instead of GetButtonClick()-- hence the slight change to JGE. Added a tiled image for the task board, which loads conservatively (I tried 128x128, but it didn't look as good).

projects/mtg/src/GameStateTransitions.cpp

@@ -0,0 +1,56 @@
+#include "../include/config.h"
+#include <JRenderer.h>
+#include <JGui.h>
+#include "../include/GameApp.h"
+#include "../include/GameStateTransitions.h"
+#include "../include/MTGDeck.h"
+#include "../include/Translate.h"
+#include "../include/OptionItem.h"
+#include "../include/GameOptions.h"
+#include "../include/DeckDataWrapper.h"
+
+TransitionBase::TransitionBase(GameApp* parent, GameState* _from, GameState* _to, float duration): GameState(parent){
+  from = _from;
+  to = _to;
+  mDuration = duration;
+  bAnimationOnly = false;
+}
+
+void TransitionBase::Update(float dt){
+  if(from && !Finished())
+    from->Update(dt);  
+  mElapsed += dt;
+}
+
+void TransitionBase::ButtonPressed(int controllerId, int controlId){
+  if(!from) return;
+  JGuiListener * jgl = dynamic_cast<JGuiListener*>(from);
+  if(jgl) 
+    jgl->ButtonPressed(controllerId,controlId);
+}
+
+void TransitionBase::Start() {
+  mElapsed = 0; 
+};
+
+void TransitionBase::End() {
+  mElapsed = 0;
+  if(!bAnimationOnly){
+    if(from)
+      from->End();
+  }
+};
+
+void TransitionFade::Render(){
+  if(from)
+    from->Render();
+  float fade = 255*mElapsed/mDuration;
+  if(mReversed)
+    fade = 255 - fade;
+  JRenderer::GetInstance()->FillRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT,ARGB((int)fade,0,0,0));
+}
+
+TransitionFade::TransitionFade(GameApp* p, GameState* f, GameState* t, float dur, bool reversed):
+TransitionBase(p, f,t,dur) {
+  mReversed = reversed;
+};