X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fapp%2FApplication.cpp;fp=src%2Fapp%2FApplication.cpp;h=bcf4f29690bb3158f30ae8a108634b87214e6b4a;hb=8b4877fe48d21d7e789cf52f81c1d6a87b06bcbc;hp=0000000000000000000000000000000000000000;hpb=42db59e3850c958821e8396fadc20fbeb71050c4;p=sdl-test8.git

diff --git a/src/app/Application.cpp b/src/app/Application.cpp
new file mode 100644
index 0000000..bcf4f29
--- /dev/null
+++ b/src/app/Application.cpp
@@ -0,0 +1,119 @@
+/*
+ * Application.cpp
+ *
+ *  Created on: Apr 8, 2012
+ *      Author: holy
+ */
+
+#include "Application.h"
+
+#include "State.h"
+
+#include <cassert>
+
+namespace app {
+
+Application::Application(sdl::InitScreen *screen, State *initialState)
+: screen(screen)
+, states()
+, timer()
+, last(SDL_GetTicks()) {
+	assert(screen && "cannot create application without screen");
+	assert(initialState && "cannot create application without initial state");
+	RealPushState(initialState);
+}
+
+Application::~Application(void) {
+	PopAllStates();
+}
+
+
+State *Application::CurrentState(void) {
+	return states.top();
+}
+
+void Application::ChangeState(State *s) {
+	RealPopState();
+	RealPushState(s);
+}
+
+void Application::PushState(State *s) {
+	RealPushState(s);
+}
+
+void Application::RealPushState(State *s) {
+	states.push(s);
+	s->EnterState(this, screen->Screen());
+}
+
+void Application::PopState(void) {
+	RealPopState();
+}
+
+void Application::RealPopState(void) {
+	if (states.empty()) return;
+	states.top()->ExitState();
+	delete states.top();
+	states.pop();
+}
+
+void Application::Quit(void) {
+	PopAllStates();
+}
+
+void Application::PopAllStates(void) {
+	while (!states.empty()) {
+		RealPopState();
+	}
+}
+
+
+void Application::Run(void) {
+	while (CurrentState()) {
+		Loop();
+	}
+}
+
+void Application::Loop(void) {
+	Uint32 now(SDL_GetTicks());
+	Uint32 deltaT(now - last);
+	if (deltaT > 34) deltaT = 34;
+
+	HandleEvents();
+	UpdateWorld(deltaT);
+	Render();
+
+	last = now;
+}
+
+
+void Application::HandleEvents(void) {
+	if (!CurrentState()) return;
+	SDL_Event event;
+	while (SDL_PollEvent(&event)) {
+		switch (event.type) {
+			case SDL_QUIT:
+				PopAllStates();
+				break;
+			default:
+				CurrentState()->HandleEvent(event);
+				break;
+		}
+	}
+}
+
+void Application::UpdateWorld(Uint32 deltaT) {
+	if (!CurrentState()) return;
+	for (Uint32 i(0); i < deltaT; ++i) {
+		timer.Update(0.001);
+		CurrentState()->UpdateWorld(timer);
+	}
+}
+
+void Application::Render(void) {
+	if (!CurrentState()) return;
+	CurrentState()->Render(screen->Screen());
+	screen->Flip();
+}
+
+}