mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 11:35:58 +00:00
622c29bffb
svn path=/trunk/; revision=29688
267 lines
7.6 KiB
C++
267 lines
7.6 KiB
C++
|
|
// ------------------------------------------------------------------
|
|
// Windows 2000 Graphics API Black Book
|
|
// Chapter 8 - Listing 8.1 (Scaled Text Demo)
|
|
//
|
|
// Created by Damon Chandler <dmc27@ee.cornell.edu>
|
|
// Updates can be downloaded at: <www.coriolis.com>
|
|
//
|
|
// Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
|
|
// if you have any questions about this code.
|
|
// ------------------------------------------------------------------
|
|
|
|
|
|
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
|
|
#include <windows.h>
|
|
#include <commctrl.h>
|
|
#include <cassert>
|
|
|
|
// for the MakeFont() function...
|
|
#include "mk_font.h"
|
|
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
|
|
|
|
|
|
HINSTANCE hInst;
|
|
const char* WndClassName = "GMainWnd";
|
|
LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
|
|
LPARAM LParam);
|
|
|
|
|
|
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPTSTR,
|
|
int nCmdShow)
|
|
{
|
|
hInst = hInstance;
|
|
|
|
WNDCLASS wc;
|
|
memset(&wc, 0, sizeof(WNDCLASS));
|
|
|
|
wc.style = CS_HREDRAW | CS_VREDRAW;
|
|
wc.lpszClassName = WndClassName;
|
|
wc.lpfnWndProc = MainWndProc;
|
|
wc.hInstance = hInst;
|
|
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
|
|
wc.hbrBackground = reinterpret_cast<HBRUSH>(
|
|
COLOR_BTNFACE + 1
|
|
);
|
|
|
|
if (RegisterClass(&wc))
|
|
{
|
|
HWND hWnd =
|
|
CreateWindow(
|
|
WndClassName, TEXT("Scaled Text Demo"),
|
|
WS_OVERLAPPEDWINDOW | WS_CAPTION |
|
|
WS_VISIBLE | WS_CLIPCHILDREN,
|
|
CW_USEDEFAULT, CW_USEDEFAULT, 800, 300,
|
|
NULL, NULL, hInst, NULL
|
|
);
|
|
|
|
if (hWnd)
|
|
{
|
|
ShowWindow(hWnd, nCmdShow);
|
|
UpdateWindow(hWnd);
|
|
|
|
MSG msg;
|
|
while (GetMessage(&msg, NULL, 0, 0))
|
|
{
|
|
TranslateMessage(&msg);
|
|
DispatchMessage(&msg);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
//-------------------------------------------------------------------------
|
|
|
|
|
|
HWND hTrackBar = NULL;
|
|
HFONT hTTFont = NULL;
|
|
double scale = 0.0;
|
|
LPCSTR pText = TEXT("The Scaled Text!");
|
|
|
|
LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam,
|
|
LPARAM lParam)
|
|
{
|
|
switch (msg)
|
|
{
|
|
case WM_CREATE:
|
|
{
|
|
INITCOMMONCONTROLSEX icx;
|
|
icx.dwSize = sizeof(INITCOMMONCONTROLSEX);
|
|
icx.dwICC = ICC_BAR_CLASSES;
|
|
|
|
InitCommonControlsEx(&icx);
|
|
|
|
hTrackBar =
|
|
CreateWindow(
|
|
TRACKBAR_CLASS, "",
|
|
TBS_HORZ | TBS_BOTH | TBS_AUTOTICKS |
|
|
TBS_FIXEDLENGTH | TBS_ENABLESELRANGE |
|
|
WS_CHILD | WS_VISIBLE,
|
|
10, 260, 375, 40,
|
|
hWnd, NULL, hInst, NULL
|
|
);
|
|
|
|
assert(hTrackBar != NULL);
|
|
SNDMSG(hTrackBar, TBM_SETTHUMBLENGTH, 20, 0);
|
|
SNDMSG(hTrackBar, TBM_SETRANGEMAX, TRUE, 100);
|
|
|
|
// create the TrueType (scalable) font
|
|
HDC hDC = GetDC(hWnd);
|
|
try
|
|
{
|
|
// see Chapter 4 for the definition of MakeFont
|
|
hTTFont = font::MakeFont(hDC, "Impact", 72);
|
|
if (!hTTFont) throw;
|
|
}
|
|
catch (...)
|
|
{
|
|
ReleaseDC(hWnd, hDC);
|
|
}
|
|
ReleaseDC(hWnd, hDC);
|
|
break;
|
|
}
|
|
case WM_HSCROLL:
|
|
{
|
|
if (reinterpret_cast<HWND>(lParam) == hTrackBar)
|
|
{
|
|
//
|
|
// adjust the scaling factor according to
|
|
// the position of the trackbar's slider
|
|
//
|
|
scale = static_cast<double>(
|
|
(SNDMSG(hTrackBar, TBM_GETPOS, 0, 0) + 1) / 50.0
|
|
);
|
|
InvalidateRect(hWnd, NULL, true);
|
|
}
|
|
break;
|
|
}
|
|
case WM_ERASEBKGND:
|
|
{
|
|
LRESULT res = DefWindowProc(hWnd, msg, wParam, lParam);
|
|
|
|
HDC hDC = reinterpret_cast<HDC>(wParam);
|
|
HFONT hOldFont = static_cast<HFONT>(
|
|
SelectObject(hDC, hTTFont)
|
|
);
|
|
try
|
|
{
|
|
SetBkMode(hDC, TRANSPARENT);
|
|
|
|
// open a path bracket
|
|
if (!BeginPath(hDC)) throw;
|
|
|
|
// record the text to the path
|
|
TextOut(hDC, 10, 10, pText, lstrlen(pText));
|
|
|
|
// close the path bracket and
|
|
// select the path into hDC
|
|
EndPath(hDC);
|
|
|
|
// determine the number of endpoints in the path
|
|
const int num_points = GetPath(hDC, NULL, NULL, 0);
|
|
if (num_points > 0)
|
|
{
|
|
// make room for the POINTs and vertex types
|
|
POINT* pPEnds = new POINT[num_points];
|
|
unsigned char* pTypes = new unsigned char[num_points];
|
|
try
|
|
{
|
|
// get the path's description
|
|
int num_got = GetPath(hDC, pPEnds, pTypes, num_points);
|
|
if (num_got > 0)
|
|
{
|
|
// start a new path bracket
|
|
if (!BeginPath(hDC)) throw;
|
|
|
|
// scale each point in the description
|
|
int iPoint;
|
|
for (iPoint = 0; iPoint < num_got; ++iPoint)
|
|
{
|
|
pPEnds[iPoint].x = static_cast<LONG>(
|
|
scale * pPEnds[iPoint].x + 0.5
|
|
);
|
|
pPEnds[iPoint].y = static_cast<LONG>(
|
|
scale * pPEnds[iPoint].y + 0.5
|
|
);
|
|
}
|
|
|
|
for (iPoint = 0; iPoint < num_points; ++iPoint)
|
|
{
|
|
// handle the MoveToEx case
|
|
if (pTypes[iPoint] == PT_MOVETO)
|
|
{
|
|
MoveToEx(
|
|
hDC, pPEnds[iPoint].x, pPEnds[iPoint].y, NULL
|
|
);
|
|
}
|
|
// handle the LineTo case
|
|
else if (
|
|
pTypes[iPoint] == PT_LINETO ||
|
|
pTypes[iPoint] == (PT_LINETO | PT_CLOSEFIGURE)
|
|
)
|
|
{
|
|
LineTo(hDC, pPEnds[iPoint].x, pPEnds[iPoint].y);
|
|
}
|
|
// handle the PolyBezierTo case
|
|
else if (
|
|
pTypes[iPoint] == PT_BEZIERTO ||
|
|
pTypes[iPoint] == (PT_BEZIERTO | PT_CLOSEFIGURE)
|
|
)
|
|
{
|
|
PolyBezierTo(hDC, pPEnds + iPoint, 3);
|
|
iPoint += 2;
|
|
}
|
|
}
|
|
|
|
// close the new path bracket
|
|
EndPath(hDC);
|
|
|
|
// stroke and fill the new path
|
|
StrokeAndFillPath(hDC);
|
|
}
|
|
}
|
|
catch (...)
|
|
{
|
|
// clean up
|
|
delete [] pTypes;
|
|
delete [] pPEnds;
|
|
throw;
|
|
}
|
|
// clean up
|
|
delete [] pTypes;
|
|
delete [] pPEnds;
|
|
}
|
|
// ...
|
|
}
|
|
catch (...)
|
|
{
|
|
SelectObject(hDC, hOldFont);
|
|
}
|
|
SelectObject(hDC, hOldFont);
|
|
return res;
|
|
}
|
|
case WM_SIZE:
|
|
{
|
|
MoveWindow(
|
|
hTrackBar,
|
|
0, HIWORD(lParam) - 40, LOWORD(lParam), 40,
|
|
false
|
|
);
|
|
break;
|
|
}
|
|
case WM_DESTROY:
|
|
{
|
|
// clean up
|
|
DeleteObject(hTTFont);
|
|
PostQuitMessage(0);
|
|
break;
|
|
}
|
|
}
|
|
return DefWindowProc(hWnd, msg, wParam, lParam);
|
|
}
|
|
//-------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|