Tk Source Code

/*
 * The zmouse.h file includes the definition for WM_MOUSEWHEEL.
 */

#include <zmouse.h>

/*
 * WM_MOUSEHWHEEL is normally defined by Winuser.h for Vista/2008 or later,
 * but is also usable on 2000/XP if IntelliPoint drivers are installed.
 */

#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E
#endif

/*
 * imm.h is needed by HandleIMEComposition
 */

#include <imm.h>
#ifdef _MSC_VER
#   pragma comment (lib, "imm32.lib")

 */

typedef struct ThreadSpecificData {
    TkDisplay *winDisplay;	/* TkDisplay structure that represents Windows
				 * screen. */
    int updatingClipboard;	/* If 1, we are updating the clipboard. */
    int surrogateBuffer;	/* Buffer for first of surrogate pair. */
    DWORD vWheelTickPrev;	/* For high resolution wheels (vertical). */
    DWORD hWheelTickPrev;	/* For high resolution wheels (horizontal). */
    short vWheelAcc;		/* For high resolution wheels (vertical). */
    short hWheelAcc;		/* For high resolution wheels (horizontal). */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Forward declarations of functions used in this file.
 */

    const char *display_name)
{
    Screen *screen;
    TkWinDrawable *twdPtr;
    Display *display;
    ThreadSpecificData *tsdPtr =
	    Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
    DWORD initialWheelTick;

    if (tsdPtr->winDisplay != NULL) {
	if (!strcmp(tsdPtr->winDisplay->display->display_name, display_name)) {
	    return tsdPtr->winDisplay;
	} else {
	    return NULL;
	}

    TkWinDisplayChanged(display);

    tsdPtr->winDisplay = ckalloc(sizeof(TkDisplay));
    ZeroMemory(tsdPtr->winDisplay, sizeof(TkDisplay));
    tsdPtr->winDisplay->display = display;
    tsdPtr->updatingClipboard = FALSE;
    initialWheelTick = GetTickCount();
    tsdPtr->vWheelTickPrev = initialWheelTick;
    tsdPtr->hWheelTickPrev = initialWheelTick;
    tsdPtr->vWheelAcc = 0;
    tsdPtr->hWheelAcc = 0;

    /*
     * Key map info must be available immediately, because of "send event".
     */
    TkpInitKeymapInfo(tsdPtr->winDisplay);

    return tsdPtr->winDisplay;

    case WM_KILLFOCUS:
    case WM_DESTROYCLIPBOARD:
    case WM_UNICHAR:
    case WM_CHAR:
    case WM_SYSKEYUP:
    case WM_KEYUP:
    case WM_MOUSEWHEEL:
    case WM_MOUSEHWHEEL:
	GenerateXEvent(hwnd, message, wParam, lParam);
	return 1;
    case WM_MENUCHAR:
	GenerateXEvent(hwnd, message, wParam, lParam);

	/*
	 * MNC_CLOSE is the only one that looks right. This is a hack.

    LPARAM lParam)
{
    XEvent event;
    TkWindow *winPtr;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
	    Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if ((message == WM_MOUSEWHEEL) || (message == WM_MOUSEHWHEEL)) {
	union {LPARAM lParam; POINTS point;} root;
	POINT pos;
	root.lParam = lParam;

	/*
	 * Redirect mousewheel events to the window containing the cursor.
	 * That feels much less strange to users, and is how all the other

	event.type = SelectionClear;
	event.xselectionclear.selection =
		Tk_InternAtom((Tk_Window)winPtr, "CLIPBOARD");
	event.xselectionclear.time = TkpGetMS();
	break;

    case WM_MOUSEWHEEL:
    case WM_MOUSEHWHEEL:
    case WM_CHAR:
    case WM_UNICHAR:
    case WM_SYSKEYDOWN:
    case WM_SYSKEYUP:
    case WM_KEYDOWN:
    case WM_KEYUP: {
	unsigned int state = GetState(message, wParam, lParam);

	/*
	 * Now set up event specific fields.
	 */

	switch (message) {
	case WM_MOUSEWHEEL: {
	    /*
	     * Support for high resolution wheels (vertical).
	     */

	    DWORD wheelTick = GetTickCount();

	    if (wheelTick - tsdPtr->vWheelTickPrev < 1500) {
		tsdPtr->vWheelAcc += (short) HIWORD(wParam);
	    } else {
		tsdPtr->vWheelAcc = (short) HIWORD(wParam);
	    }
	    tsdPtr->vWheelTickPrev = wheelTick;
	    if (abs(tsdPtr->vWheelAcc) < WHEEL_DELTA) {
		return;
	    }

	    /*
	     * We have invented a new X event type to handle this event. It
	     * still uses the KeyPress struct. However, the keycode field has
	     * been overloaded to hold the zDelta of the wheel. Set nbytes to
	     * 0 to prevent conversion of the keycode to a keysym in
	     * TkpGetString. [Bug 1118340].
	     */

	    event.type = MouseWheelEvent;
	    event.xany.send_event = -1;
	    event.xkey.nbytes = 0;
	    event.xkey.keycode = tsdPtr->vWheelAcc / WHEEL_DELTA * WHEEL_DELTA;
	    tsdPtr->vWheelAcc = tsdPtr->vWheelAcc % WHEEL_DELTA;
	    break;
	}
	case WM_MOUSEHWHEEL: {
	    /*
	     * Support for high resolution wheels (horizontal).
	     */

	    DWORD wheelTick = GetTickCount();

	    if (wheelTick - tsdPtr->hWheelTickPrev < 1500) {
		tsdPtr->hWheelAcc -= (short) HIWORD(wParam);
	    } else {
		tsdPtr->hWheelAcc = -((short) HIWORD(wParam));
	    }
	    tsdPtr->hWheelTickPrev = wheelTick;
	    if (abs(tsdPtr->hWheelAcc) < WHEEL_DELTA) {
		return;
	    }

	    /*
	     * We have invented a new X event type to handle this event. It
	     * still uses the KeyPress struct. However, the keycode field has
	     * been overloaded to hold the zDelta of the wheel. Set nbytes to
	     * 0 to prevent conversion of the keycode to a keysym in
	     * TkpGetString. [Bug 1118340].
	     */

	    event.type = MouseWheelEvent;
	    event.xany.send_event = -1;
	    event.xkey.nbytes = 0;
	    event.xkey.state |= ShiftMask;
	    event.xkey.keycode = tsdPtr->hWheelAcc / WHEEL_DELTA * WHEEL_DELTA;
	    tsdPtr->hWheelAcc = tsdPtr->hWheelAcc % WHEEL_DELTA;
	    break;
	}
	case WM_SYSKEYDOWN:
	case WM_KEYDOWN:
	    /*
	     * Check for translated characters in the event queue. Setting
	     * xany.send_event to -1 indicates to the Windows implementation