diff options
Diffstat (limited to 'tk8.6/generic/ttk/ttkTrack.c')
| -rw-r--r-- | tk8.6/generic/ttk/ttkTrack.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/tk8.6/generic/ttk/ttkTrack.c b/tk8.6/generic/ttk/ttkTrack.c deleted file mode 100644 index 396b073..0000000 --- a/tk8.6/generic/ttk/ttkTrack.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (c) 2004, Joe English - * - * TtkTrackElementState() -- helper routine for widgets - * like scrollbars in which individual elements may - * be active or pressed instead of the widget as a whole. - * - * Usage: - * TtkTrackElementState(&recordPtr->core); - * - * Registers an event handler on the widget that tracks pointer - * events and updates the state of the element under the - * mouse cursor. - * - * The "active" element is the one under the mouse cursor, - * and is normally set to the ACTIVE state unless another element - * is currently being pressed. - * - * The active element becomes "pressed" on <ButtonPress> events, - * and remains "active" and "pressed" until the corresponding - * <ButtonRelease> event. - * - * TODO: Handle "chords" properly (e.g., <B1-ButtonPress-2>) - */ - -#include <tk.h> -#include "ttkTheme.h" -#include "ttkWidget.h" - -typedef struct { - WidgetCore *corePtr; /* widget to track */ - Ttk_Layout tracking; /* current layout being tracked */ - Ttk_Element activeElement; /* element under the mouse cursor */ - Ttk_Element pressedElement; /* currently pressed element */ -} ElementStateTracker; - -/* - * ActivateElement(es, node) -- - * Make 'node' the active element if non-NULL. - * Deactivates the currently active element if different. - * - * The active element has TTK_STATE_ACTIVE set _unless_ - * another element is 'pressed' - */ -static void ActivateElement(ElementStateTracker *es, Ttk_Element element) -{ - if (es->activeElement == element) { - /* No change */ - return; - } - - if (!es->pressedElement) { - if (es->activeElement) { - /* Deactivate old element */ - Ttk_ChangeElementState(es->activeElement, 0,TTK_STATE_ACTIVE); - } - if (element) { - /* Activate new element */ - Ttk_ChangeElementState(element, TTK_STATE_ACTIVE,0); - } - TtkRedisplayWidget(es->corePtr); - } - - es->activeElement = element; -} - -/* ReleaseElement -- - * Releases the currently pressed element, if any. - */ -static void ReleaseElement(ElementStateTracker *es) -{ - if (!es->pressedElement) - return; - - Ttk_ChangeElementState( - es->pressedElement, 0,TTK_STATE_PRESSED|TTK_STATE_ACTIVE); - es->pressedElement = 0; - - /* Reactivate element under the mouse cursor: - */ - if (es->activeElement) - Ttk_ChangeElementState(es->activeElement, TTK_STATE_ACTIVE,0); - - TtkRedisplayWidget(es->corePtr); -} - -/* PressElement -- - * Presses the specified element. - */ -static void PressElement(ElementStateTracker *es, Ttk_Element element) -{ - if (es->pressedElement) { - ReleaseElement(es); - } - - if (element) { - Ttk_ChangeElementState( - element, TTK_STATE_PRESSED|TTK_STATE_ACTIVE, 0); - } - - es->pressedElement = element; - TtkRedisplayWidget(es->corePtr); -} - -/* ElementStateEventProc -- - * Event handler for tracking element states. - */ - -static const unsigned ElementStateMask = - ButtonPressMask - | ButtonReleaseMask - | PointerMotionMask - | LeaveWindowMask - | EnterWindowMask - | StructureNotifyMask - ; - -static void -ElementStateEventProc(ClientData clientData, XEvent *ev) -{ - ElementStateTracker *es = clientData; - Ttk_Layout layout = es->corePtr->layout; - Ttk_Element element; - - /* Guard against dangling pointers [#2431428] - */ - if (es->tracking != layout) { - es->pressedElement = es->activeElement = 0; - es->tracking = layout; - } - - switch (ev->type) - { - case MotionNotify : - element = Ttk_IdentifyElement( - layout, ev->xmotion.x, ev->xmotion.y); - ActivateElement(es, element); - break; - case LeaveNotify: - ActivateElement(es, 0); - if (ev->xcrossing.mode == NotifyGrab) - PressElement(es, 0); - break; - case EnterNotify: - element = Ttk_IdentifyElement( - layout, ev->xcrossing.x, ev->xcrossing.y); - ActivateElement(es, element); - break; - case ButtonPress: - element = Ttk_IdentifyElement( - layout, ev->xbutton.x, ev->xbutton.y); - if (element) - PressElement(es, element); - break; - case ButtonRelease: - ReleaseElement(es); - break; - case DestroyNotify: - /* Unregister this event handler and free client data. - */ - Tk_DeleteEventHandler(es->corePtr->tkwin, - ElementStateMask, ElementStateEventProc, es); - ckfree(clientData); - break; - } -} - -/* - * TtkTrackElementState -- - * Register an event handler to manage the 'pressed' - * and 'active' states of individual widget elements. - */ - -void TtkTrackElementState(WidgetCore *corePtr) -{ - ElementStateTracker *es = ckalloc(sizeof(*es)); - es->corePtr = corePtr; - es->tracking = 0; - es->activeElement = es->pressedElement = 0; - Tk_CreateEventHandler(corePtr->tkwin, - ElementStateMask,ElementStateEventProc,es); -} - |