My Documents/dxframework/dxf/dxf-engine/dxf_statemanager.cpp

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/*      DXFramework Copyright (c) 2006, Jonathan Voigt, University of Michigan.
        See http://dxframework.sourceforge.net/ for a list of contributors.
        All rights reserved.

        Redistribution and use in source and binary forms, with or without modification, 
        are permitted provided that the following conditions are met:

                * Redistributions of source code must retain the above copyright notice, 
                this list of conditions and the following disclaimer.

                * Redistributions in binary form must reproduce the above copyright notice, 
                this list of conditions and the following disclaimer in the documentation 
                and/or other materials provided with the distribution.

                * Neither the name of the DXFramework project nor the names of its 
                contributors may be used to endorse or promote products derived from this 
                software without specific prior written permission.

        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
        ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
        DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 
        ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
        (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
        LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
        ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
        (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
        SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "dxframework.h"

namespace dxf {
        /*      This is the callback given to the dialog.  This simply calls the OnGUIEvent
                method on the game state (dxf::GUI) interface */
        void CALLBACK OnGameStateGUIEvent( UINT nEvent, int nControlID, CDXUTControl* pControl, void* pUserContext ) {
                GameState* pCurrentState = Model::Instance()->GetCurrentGameState();
                if (pCurrentState) pCurrentState->OnGUIEvent(nEvent, nControlID, pControl, pUserContext);
        }

        CDXUTDialogResourceManager GameStateGUI::drm;

        HRESULT GameStateGUI::Load() {
                dialog.Init(&drm);      // Initialize dialog with resource manager
                dialog.SetCallback(OnGameStateGUIEvent); // Set the dialog callback for GUI events
                return S_OK;
        }

        void GameStateGUI::Unload() {
                dialog.RemoveAllControls();// Remove controls from dialog to assist unloading
                drm.UnregisterDialog(&dialog);// Unregister the dialog from the resource manager
        }

        bool GameStateGUI::MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
                if (drm.MsgProc( hWnd, uMsg, wParam, lParam )) return true;             // if they return true, pass it on.
                if (dialog.MsgProc( hWnd, uMsg, wParam, lParam )) return true;
                return false;
        }

        HRESULT GameStateGUI::OnFrameRender(float fElapsedTime) {
                HRESULT hr;
                V_RETURN(dialog.OnRender(fElapsedTime));
                return S_OK;
        }

        HRESULT GameStateGUI::OnCreateDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc) {
                HRESULT hr;
                V_RETURN( drm.OnCreateDevice( pd3dDevice ) );
                return S_OK;
        }

        HRESULT GameStateGUI::OnResetDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc) {
                HRESULT hr;
                V_RETURN(drm.OnResetDevice());
                return S_OK;
        }

        void GameStateGUI::OnLostDevice() {
                drm.OnLostDevice();
        }

        void GameStateGUI::OnDestroyDevice() {
                drm.OnDestroyDevice();
        }

        StateManager::StateManager() {
                pCurrentState = 0;
        }

        void StateManager::Load() {
                pCurrentState = 0;
        }

        void StateManager::Unload() {
                if (pCurrentState) pCurrentState->Unload();

                StateMapIterator iter = states.begin();
                while (iter != states.end()) {
                        iter = states.erase(iter);
                }
        }

        void StateManager::RegisterState(const std::wstring& name, GameState* pState) {
                if (states.find(name) != states.end()) {
                        Console::output << L"Warning: overwriting state: " << name << std::endl;
                }
                if (newState.empty()) newState = name;
                states[name] = pState;
        }

        void StateManager::ChangeState(const std::wstring& name) {
                newState = name;
        }

        bool StateManager::JustChangedState() {
                return newState.size() ? true : false;
        }

        void StateManager::Update() {
                HRESULT hr;
                if (newState.size()) {
                        // change states
                        if (pCurrentState) {
                                pCurrentState->OnLostDevice();
                                pCurrentState->OnDestroyDevice();
                                pCurrentState->Unload();
                        }
                        assert(states.find(newState) != states.end());
                        pCurrentState = states[newState];
                        V(pCurrentState->Load());
                        V(pCurrentState->OnCreateDevice(DXUTGetD3DDevice(), DXUTGetBackBufferSurfaceDesc()));
                        V(pCurrentState->OnResetDevice(DXUTGetD3DDevice(), DXUTGetBackBufferSurfaceDesc()));
                        newState = L"";
                }
        }

        void StateManager::Resize(const D3DSURFACE_DESC* pBackBufferSurfaceDesc) {
                if (pCurrentState) pCurrentState->Resize(pBackBufferSurfaceDesc);
        }

        GameState* StateManager::GetCurrentGameState() {
                return pCurrentState;
        }
} // namespace dxf

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