Win.cpp

/*-----------------------------------------------------------------------------

Win.cpp

2006 Shamus Young

-------------------------------------------------------------------------------

Create the main window and make it go.

-----------------------------------------------------------------------------*/

#include "precompiled.h"

#define CONSOLE_SIZE	30000
#define CONSOLE_PAGE	1000
#define MOUSE_MOVEMENT	0.4f
#define MAX_STRING		128

static HWND         hwnd;
static HINSTANCE    module;
static int          width;
static int          height;
static bool         lmb;
static bool         rmb;
static bool         mouse_forced;
static vec2        mouse_pos;
static vec2        select_pos;

/*
====================
CenterCursor
====================
*/
void CenterCursor()
{
	int		center_x;
	int		center_y;
	RECT	rect;
	
	SetCursor( NULL );
	mouse_forced = true;
	GetWindowRect( hwnd, &rect );
	center_x = rect.left + ( rect.right - rect.left ) / 2;
	center_y = rect.top + ( rect.bottom - rect.top ) / 2;
	SetCursorPos( center_x, center_y );
}

/*
====================
MoveCursor
====================
*/
void MoveCursor( int x, int y )
{
	int		center_x;
	int		center_y;
	RECT	rect;
	
	SetCursor( NULL );
	mouse_forced = true;
	GetWindowRect( hwnd, &rect );
	center_x = rect.left + x;
	center_y = rect.top + y;
	SetCursorPos( center_x, center_y );
	
}

LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
	RECT	r;
	float	delta_x, delta_y;
	vec2	p;
	
	switch( message ) 	{
	case WM_MOVE:
		GetClientRect( hwnd, &r );
		height = r.bottom - r.top;
		width = r.right - r.left;
		break;
		
	case WM_LBUTTONDOWN:
		lmb = true;
		SetCapture( hwnd );
		break;
		
	case WM_RBUTTONDOWN:
		rmb = true;
		SetCapture( hwnd );
		break;
		
	case WM_LBUTTONUP:
		lmb = false;
		if( !rmb ) {
			ReleaseCapture();
			MoveCursor( static_cast<int>(select_pos.x), static_cast<int>(select_pos.y) );
		}
		break;
		
	case WM_RBUTTONUP:
		rmb = false;
		if( !lmb ) {
			ReleaseCapture();
			MoveCursor( static_cast<int>(select_pos.x), static_cast<int>(select_pos.y) );
		}
		break;
		
	case WM_MOUSEMOVE:
		p.x = LOWORD( lParam ); // horizontal position of cursor
		p.y = HIWORD( lParam ); // vertical position of cursor
		if( !mouse_forced && !lmb && !rmb ) {
			select_pos = p;
		}
		if( mouse_forced ) {
			mouse_forced = false;
		} else if( rmb || lmb ) {
			CenterCursor();
			delta_x = ( float )( mouse_pos.x - p.x ) / MOUSE_MOVEMENT;
			delta_y = ( float )( mouse_pos.y - p.y ) / MOUSE_MOVEMENT;
			if( rmb && lmb ) {
				CameraSelectionYaw( delta_x );
				CameraSelectionZoom( -delta_y );
			} else if( rmb ) {
				CameraPan( delta_x );
				CameraForward( delta_y );
			} else if( lmb ) {
				CameraSelectionYaw( delta_x );
				CameraSelectionPitch( delta_y );
			}
		}
		mouse_pos = p;
		break;
		
	case WM_CLOSE:
		AppQuit();
		return 0;
	}
	
	return DefWindowProc( hWnd, message, wParam, lParam );
}

/*
====================
WinPopup

Show popup window with message
====================
*/
void WinPopup( char* message, ... )
{
	va_list	marker;
	char	buf[1024];
	
	va_start( marker, message );
	vsprintf_s( buf, message, marker );
	va_end( marker );
	MessageBox( NULL, buf, APP_TITLE.c_str(), MB_ICONSTOP | MB_OK | MB_TASKMODAL );
}

int WinWidth( void )
{
	return width;
}

void WinMousePosition( vec2& v )
{
	v.x = select_pos.x;
	v.y = select_pos.y;
}

int WinHeight( void )
{
	return height;
}

void WinTerm( void )
{
	DestroyWindow( hwnd );
}

HWND WinHwnd( void )
{
	return hwnd;
}

/*
====================
WinInit

Create a Win32 API window
====================
*/
bool WinInit( void )
{
	WNDCLASSEX wcex;
	
	wcex.cbSize			= sizeof( WNDCLASSEX );
	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= ( WNDPROC )WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= AppInstance();
	wcex.hIcon			= NULL;
	wcex.hCursor		= LoadCursor( NULL, IDC_ARROW );
	wcex.hbrBackground	= ( HBRUSH )( COLOR_BTNFACE + 1 );
	wcex.lpszMenuName	= NULL;
	wcex.lpszClassName	= APP_TITLE.c_str();
	wcex.hIconSm		= NULL;
	
	if( !RegisterClassEx( &wcex ) ) {
		WinPopup( "Cannot create window class" );
		return false;
	}
	
	if( !( hwnd = CreateWindowEx( 0, APP_TITLE.c_str(), APP_TITLE.c_str(), WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,
								  CW_USEDEFAULT, 0, 544, 640, NULL, NULL, AppInstance(), NULL ) ) ) {
		WinPopup( "Cannot create window" );
		return false;
	}
	
	ShowWindow( hwnd, SW_SHOW );
	UpdateWindow( hwnd );
	return true;
}