252 lines
5.4 KiB
C
252 lines
5.4 KiB
C
/*
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* Caret functions
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*
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* Copyright 1993 David Metcalfe
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*/
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static char Copyright[] = "Copyright David Metcalfe, 1993";
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#include "windows.h"
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#include "stddebug.h"
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/* #define DEBUG_CARET */
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/* #undef DEBUG_CARET */
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#include "debug.h"
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typedef struct
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{
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HWND hwnd;
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short hidden;
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BOOL on;
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short x;
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short y;
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short width;
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short height;
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COLORREF color;
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HBITMAP bitmap;
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WORD timeout;
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WORD timerid;
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} CARET;
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static CARET Caret;
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static BOOL LockCaret;
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static WORD CARET_Callback(HWND hwnd, WORD msg, WORD timerid, LONG ctime);
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static void CARET_HideCaret();
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/*****************************************************************
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* CARET_Callback
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*/
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static WORD CARET_Callback(HWND hwnd, WORD msg, WORD timerid, LONG ctime)
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{
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HDC hdc;
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HBRUSH hBrush;
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HRGN rgn;
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dprintf_caret(stddeb,"CARET_Callback: id=%d: LockCaret=%d, hidden=%d, on=%d\n",
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timerid, LockCaret, Caret.hidden, Caret.on);
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if (!LockCaret && (!Caret.hidden || Caret.on))
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{
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Caret.on = (Caret.on ? FALSE : TRUE);
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hdc = GetDC(Caret.hwnd);
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if (Caret.bitmap == 0 || Caret.bitmap == 1)
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hBrush = CreateSolidBrush(Caret.color);
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else
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hBrush = CreatePatternBrush(Caret.bitmap);
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SelectObject(hdc, (HANDLE)hBrush);
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SetROP2(hdc, R2_XORPEN);
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rgn = CreateRectRgn(Caret.x, Caret.y,
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Caret.x + Caret.width,
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Caret.y + Caret.height);
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FillRgn(hdc, rgn, hBrush);
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DeleteObject((HANDLE)rgn);
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DeleteObject((HANDLE)hBrush);
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ReleaseDC(Caret.hwnd, hdc);
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}
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return 0;
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}
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/*****************************************************************
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* CARET_HideCaret
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*/
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static void CARET_HideCaret()
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{
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HDC hdc;
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HBRUSH hBrush;
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HRGN rgn;
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Caret.on = FALSE;
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hdc = GetDC(Caret.hwnd);
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if (Caret.bitmap == 0 || Caret.bitmap == 1)
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hBrush = CreateSolidBrush(Caret.color);
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else
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hBrush = CreatePatternBrush(Caret.bitmap);
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SelectObject(hdc, (HANDLE)hBrush);
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SetROP2(hdc, R2_XORPEN);
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rgn = CreateRectRgn(Caret.x, Caret.y,
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Caret.x + Caret.width,
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Caret.y + Caret.height);
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FillRgn(hdc, rgn, hBrush);
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DeleteObject((HANDLE)rgn);
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DeleteObject((HANDLE)hBrush);
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ReleaseDC(Caret.hwnd, hdc);
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}
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/*****************************************************************
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* CreateCaret (USER.163)
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*/
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void CreateCaret(HWND hwnd, HBITMAP bitmap, short width, short height)
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{
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if (!hwnd) return;
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/* if cursor already exists, destroy it */
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/* if (Caret.hwnd)
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DestroyCaret();
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*/
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if (bitmap && bitmap != 1)
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Caret.bitmap = bitmap;
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if (width)
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Caret.width = width;
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else
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Caret.width = GetSystemMetrics(SM_CXBORDER);
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if (height)
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Caret.height = height;
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else
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Caret.height = GetSystemMetrics(SM_CYBORDER);
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Caret.hwnd = hwnd;
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Caret.hidden = 1;
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Caret.on = FALSE;
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Caret.x = 0;
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Caret.y = 0;
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if (bitmap == 1)
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Caret.color = GetSysColor(COLOR_GRAYTEXT);
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else
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Caret.color = GetSysColor(COLOR_WINDOWTEXT);
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Caret.timeout = 750;
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LockCaret = FALSE;
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Caret.timerid = SetSystemTimer(NULL, 0, Caret.timeout, CARET_Callback);
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dprintf_caret(stddeb,"CreateCaret: hwnd=%d, timerid=%d\n",
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hwnd, Caret.timerid);
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}
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/*****************************************************************
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* DestroyCaret (USER.164)
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*/
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void DestroyCaret()
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{
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/* if (!Caret.hwnd) return;
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*/
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dprintf_caret(stddeb,"DestroyCaret: timerid=%d\n", Caret.timerid);
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KillSystemTimer(NULL, Caret.timerid);
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if (Caret.on)
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CARET_HideCaret();
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Caret.hwnd = 0; /* cursor marked as not existing */
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}
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/*****************************************************************
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* SetCaretPos (USER.165)
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*/
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void SetCaretPos(short x, short y)
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{
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if (!Caret.hwnd) return;
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dprintf_caret(stddeb,"SetCaretPos: x=%d, y=%d\n", x, y);
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LockCaret = TRUE;
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if (Caret.on)
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CARET_HideCaret();
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Caret.x = x;
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Caret.y = y;
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LockCaret = FALSE;
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}
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/*****************************************************************
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* HideCaret (USER.166)
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*/
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void HideCaret(HWND hwnd)
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{
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if (!Caret.hwnd) return;
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if (hwnd && (Caret.hwnd != hwnd)) return;
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LockCaret = TRUE;
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if (Caret.on)
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CARET_HideCaret();
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++Caret.hidden;
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LockCaret = FALSE;
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}
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/*****************************************************************
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* ShowCaret (USER.167)
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*/
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void ShowCaret(HWND hwnd)
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{
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if (!Caret.hwnd) return;
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if (hwnd && (Caret.hwnd != hwnd)) return;
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dprintf_caret(stddeb,"ShowCaret: hidden=%d\n", Caret.hidden);
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if (Caret.hidden)
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--Caret.hidden;
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}
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/*****************************************************************
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* SetCaretBlinkTime (USER.168)
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*/
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void SetCaretBlinkTime(WORD msecs)
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{
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if (!Caret.hwnd) return;
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KillSystemTimer(NULL, Caret.timerid);
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Caret.timeout = msecs;
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Caret.timerid = SetSystemTimer(NULL, 0, Caret.timeout, CARET_Callback);
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}
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/*****************************************************************
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* GetCaretBlinkTime (USER.169)
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*/
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WORD GetCaretBlinkTime()
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{
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if (!Caret.hwnd) return 0;
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return Caret.timeout;
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}
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/*****************************************************************
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* GetCaretPos (USER.183)
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*/
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void GetCaretPos(LPPOINT pt)
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{
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if (!Caret.hwnd || !pt) return;
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pt->x = Caret.x;
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pt->y = Caret.y;
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}
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