tkwinbutton.c

linux系统下的音频通信

/* 
 * tkWinButton.c --
 *
 *	This file implements the Windows specific portion of the button
 *	widgets.
 *
 * Copyright (c) 1996 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * SCCS: @(#) tkWinButton.c 1.12 97/09/02 13:18:27
 */

#define OEMRESOURCE
#include "tkWinInt.h"
#include "tkButton.h"

/*
 * These macros define the base style flags for the different button types.
 */

#define LABEL_STYLE (BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define PUSH_STYLE (BS_OWNERDRAW | BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define CHECK_STYLE (BS_OWNERDRAW | BS_CHECKBOX | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define RADIO_STYLE (BS_OWNERDRAW | BS_RADIOBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)

static DWORD buttonStyles[] = {
    LABEL_STYLE, PUSH_STYLE, CHECK_STYLE, RADIO_STYLE
};

/*
 * Declaration of Windows specific button structure.
 */

typedef struct WinButton {
    TkButton info;		/* Generic button info. */
    WNDPROC oldProc;		/* Old window procedure. */
    HWND hwnd;			/* Current window handle. */
    Pixmap pixmap;		/* Bitmap for rendering the button. */
    DWORD style;		/* Window style flags. */
} WinButton;


/*
 * The following macro reverses the order of RGB bytes to convert
 * between RGBQUAD and COLORREF values.
 */

#define FlipColor(rgb) (RGB(GetBValue(rgb),GetGValue(rgb),GetRValue(rgb)))

/*
 * The following enumeration defines the meaning of the palette entries
 * in the "buttons" image used to draw checkbox and radiobutton indicators.
 */

enum {
    PAL_CHECK = 0,
    PAL_TOP_OUTER = 1,
    PAL_BOTTOM_OUTER = 2,
    PAL_BOTTOM_INNER = 3,
    PAL_INTERIOR = 4,
    PAL_TOP_INNER = 5,
    PAL_BACKGROUND = 6
};

/*
 * Set to non-zero if this module is initialized.
 */

static int initialized = 0;

/*
 * Variables for the cached information about the boxes bitmap.
 */

static BITMAPINFOHEADER *boxesPtr = NULL;   /* Information about the bitmap. */
static DWORD *boxesPalette = NULL;	    /* Pointer to color palette. */
static LPSTR boxesBits = NULL;		    /* Pointer to bitmap data. */
static DWORD boxHeight = 0, boxWidth = 0;    /* Size of each sub-image. */

/*
 * This variable holds the default border width for a button in string
 * form for use in a Tk_ConfigSpec.
 */

static char defWidth[8];

/*
 * Declarations for functions defined in this file.
 */

static int		ButtonBindProc _ANSI_ARGS_((ClientData clientData,
			    Tcl_Interp *interp, XEvent *eventPtr,
			    Tk_Window tkwin, KeySym keySym));
static LRESULT CALLBACK	ButtonProc _ANSI_ARGS_((HWND hwnd, UINT message,
			    WPARAM wParam, LPARAM lParam));
static DWORD		ComputeStyle _ANSI_ARGS_((WinButton* butPtr));
static Window		CreateProc _ANSI_ARGS_((Tk_Window tkwin,
			    Window parent, ClientData instanceData));
static void		InitBoxes _ANSI_ARGS_((void));
static void		UpdateButtonDefaults _ANSI_ARGS_((void));

/*
 * The class procedure table for the button widgets.
 */

TkClassProcs tkpButtonProcs = { 
    CreateProc,			/* createProc. */
    TkButtonWorldChanged,	/* geometryProc. */
    NULL			/* modalProc. */ 
};


/*
 *----------------------------------------------------------------------
 *
 * InitBoxes --
 *
 *	This function load the Tk 3d button bitmap.  "buttons" is a 16 
 *	color bitmap that is laid out such that the top row contains 
 *	the 4 checkbox images, and the bottom row contains the radio 
 *	button images. Note that the bitmap is stored in bottom-up 
 *	format.  Also, the first seven palette entries are used to 
 *	identify the different parts of the bitmaps so we can do the 
 *	appropriate color mappings based on the current button colors.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Loads the "buttons" resource.
 *
 *----------------------------------------------------------------------
 */

static void
InitBoxes()
{
    /*
     * For DLLs like Tk, the HINSTANCE is the same as the HMODULE.
     */

    HMODULE module = (HINSTANCE) Tk_GetHINSTANCE();
    HRSRC hrsrc;
    HGLOBAL hblk;
    LPBITMAPINFOHEADER newBitmap;
    DWORD size;

    hrsrc = FindResource(module, "buttons", RT_BITMAP);
    if (hrsrc) {
	hblk = LoadResource(module, hrsrc);
	boxesPtr = (LPBITMAPINFOHEADER)LockResource(hblk);
    }

    /*
     * Copy the DIBitmap into writable memory.
     */

    if (boxesPtr != NULL && !(boxesPtr->biWidth % 4)
	    && !(boxesPtr->biHeight % 2)) {
	size = boxesPtr->biSize + (1 << boxesPtr->biBitCount) * sizeof(RGBQUAD)
	    + boxesPtr->biSizeImage;
	newBitmap = (LPBITMAPINFOHEADER) ckalloc(size);
	memcpy(newBitmap, boxesPtr, size);
	boxesPtr = newBitmap;
	boxWidth = boxesPtr->biWidth / 4;
	boxHeight = boxesPtr->biHeight / 2;
	boxesPalette = (DWORD*) (((LPSTR)boxesPtr) + boxesPtr->biSize);
	boxesBits = ((LPSTR)boxesPalette)
	    + ((1 << boxesPtr->biBitCount) * sizeof(RGBQUAD));
    } else {
	boxesPtr = NULL;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * UpdateButtonDefaults --
 *
 *	This function retrieves the current system defaults for
 *	the button widgets.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Updates the configuration defaults for buttons.
 *
 *----------------------------------------------------------------------
 */

void
UpdateButtonDefaults()
{
    Tk_ConfigSpec *specPtr;
    int width = GetSystemMetrics(SM_CXEDGE);

    if (width == 0) {
	width = 1;
    }
    sprintf(defWidth, "%d", width);
    for (specPtr = tkpButtonConfigSpecs; specPtr->type != TK_CONFIG_END;
	    specPtr++) {
	if (specPtr->offset == Tk_Offset(TkButton, borderWidth)) {
	    specPtr->defValue = defWidth;
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpCreateButton --
 *
 *	Allocate a new TkButton structure.
 *
 * Results:
 *	Returns a newly allocated TkButton structure.
 *
 * Side effects:
 *	Registers an event handler for the widget.
 *
 *----------------------------------------------------------------------
 */

TkButton *
TkpCreateButton(tkwin)
    Tk_Window tkwin;
{
    WinButton *butPtr;

    if (!initialized) {
	UpdateButtonDefaults();
	initialized = 1;
    }

    butPtr = (WinButton *)ckalloc(sizeof(WinButton));
    butPtr->hwnd = NULL;
    return (TkButton *) butPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * CreateProc --
 *
 *	This function creates a new Button control, subclasses
 *	the instance, and generates a new Window object.
 *
 * Results:
 *	Returns the newly allocated Window object, or None on failure.
 *
 * Side effects:
 *	Causes a new Button control to come into existence.
 *
 *----------------------------------------------------------------------
 */

static Window
CreateProc(tkwin, parentWin, instanceData)
    Tk_Window tkwin;		/* Token for window. */
    Window parentWin;		/* Parent of new window. */
    ClientData instanceData;	/* Button instance data. */
{
    Window window;
    HWND parent;
    char *class;
    WinButton *butPtr = (WinButton *)instanceData;

    parent = Tk_GetHWND(parentWin);
    if (butPtr->info.type == TYPE_LABEL) {
	class = "STATIC";
	butPtr->style = SS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
    } else {
	class = "BUTTON";
	butPtr->style = BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
    }
    butPtr->hwnd = CreateWindow(class, NULL, butPtr->style,
	    Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin),
	    parent, NULL, Tk_GetHINSTANCE(), NULL);
    SetWindowPos(butPtr->hwnd, HWND_TOP, 0, 0, 0, 0,
		    SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
    butPtr->oldProc = (WNDPROC)SetWindowLong(butPtr->hwnd, GWL_WNDPROC,
	    (DWORD) ButtonProc);

    window = Tk_AttachHWND(tkwin, butPtr->hwnd);
    return window;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpDestroyButton --
 *
 *	Free data structures associated with the button control.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Restores the default control state.
 *
 *----------------------------------------------------------------------
 */

void
TkpDestroyButton(butPtr)
    TkButton *butPtr;
{
    WinButton *winButPtr = (WinButton *)butPtr;
    HWND hwnd = winButPtr->hwnd;
    if (hwnd) {
	SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) winButPtr->oldProc);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpDisplayButton --
 *
 *	This procedure is invoked to display a button widget.  It is
 *	normally invoked as an idle handler.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Information appears on the screen.  The REDRAW_PENDING flag
 *	is cleared.
 *
 *----------------------------------------------------------------------
 */

void
TkpDisplayButton(clientData)
    ClientData clientData;	/* Information about widget. */
{
    TkWinDCState state;
    HDC dc;
    register TkButton *butPtr = (TkButton *) clientData;
    GC gc;
    Tk_3DBorder border;
    Pixmap pixmap;
    int x = 0;			/* Initialization only needed to stop
				 * compiler warning. */
    int y, relief;
    register Tk_Window tkwin = butPtr->tkwin;
    int width, height;
    int defaultWidth;		/* Width of default ring. */
    int offset;			/* 0 means this is a label widget.  1 means
				 * it is a flavor of button, so we offset
				 * the text to make the button appear to
				 * move up and down as the relief changes. */

    butPtr->flags &= ~REDRAW_PENDING;
    if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
	return;
    }

    border = butPtr->normalBorder;
    if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
	gc = butPtr->disabledGC;
    } else if ((butPtr->state == tkActiveUid)
	    && !Tk_StrictMotif(butPtr->tkwin)) {
	gc = butPtr->activeTextGC;
	border = butPtr->activeBorder;
    } else {
	gc = butPtr->normalTextGC;
    }
    if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid)
	    && (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
	border = butPtr->selectBorder;
    }

    /*
     * Override the relief specified for the button if this is a
     * checkbutton or radiobutton and there's no indicator.
     */

    relief = butPtr->relief;
    if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
	relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
		: TK_RELIEF_RAISED;
    }

    /*
     * Compute width of default ring and offset for pushed buttons.
     */

    if (butPtr->type == TYPE_BUTTON) {
	defaultWidth = ((butPtr->defaultState == tkActiveUid)
		? butPtr->highlightWidth : 0);
	offset = 1;
    } else {
	defaultWidth = 0;
	if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
	    offset = 1;
	} else {
	    offset = 0;
	}
    }

    /*