282 lines
8.1 KiB
C
282 lines
8.1 KiB
C
/*
|
|
* Copyright 2013 Stephen Fryatt <stevef@netsurf-browser.org>
|
|
*
|
|
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
|
*
|
|
* NetSurf is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/** \file
|
|
* Mouse dragging and tracking support implementation.
|
|
*
|
|
* Two different functions are provided:-
|
|
*
|
|
* 1. Wimp_DragBox support, allowing clients to start a drag and specify
|
|
* callbacks to be used
|
|
*
|
|
* - on Null Polls while the drag is active,
|
|
* - when the drag terminates with Event_DragEnd, and
|
|
* - when the drag terminates with Escape being pressed.
|
|
*
|
|
* 2. Mouse tracking support, allowing clients to track the mouse while it
|
|
* remains in the current window and specify callbacks to be used
|
|
*
|
|
* - on Null Polls while the pointer is in the window, and
|
|
* - when the pointer leaves the window.
|
|
*/
|
|
|
|
#include "oslib/wimp.h"
|
|
|
|
#include "riscos/mouse.h"
|
|
#include "utils/log.h"
|
|
#include "utils/utils.h"
|
|
|
|
/* Data for the wimp drag handler. */
|
|
|
|
static void (*ro_mouse_drag_end_callback)(wimp_dragged *dragged, void *data)
|
|
= NULL;
|
|
static void (*ro_mouse_drag_track_callback)(wimp_pointer *pointer, void *data)
|
|
= NULL;
|
|
static void (*ro_mouse_drag_cancel_callback)(void *data) = NULL;
|
|
static void *ro_mouse_drag_data = NULL;
|
|
|
|
static bool ro_mouse_ignore_leaving_event = false;
|
|
|
|
/* Data for the wimp poll handler. */
|
|
|
|
static void (*ro_mouse_poll_end_callback)(wimp_leaving *leaving, void *data)
|
|
= NULL;
|
|
static void (*ro_mouse_poll_track_callback)(wimp_pointer *pointer, void *data)
|
|
= NULL;
|
|
static void *ro_mouse_poll_data = NULL;
|
|
|
|
|
|
/**
|
|
* Process Null polls for any drags and mouse trackers that are currently
|
|
* active.
|
|
*/
|
|
|
|
void ro_mouse_poll(void)
|
|
{
|
|
wimp_pointer pointer;
|
|
os_error *error;
|
|
|
|
/* If no trackers are active, just exit. */
|
|
|
|
if (ro_mouse_drag_track_callback == NULL &&
|
|
ro_mouse_poll_track_callback == NULL)
|
|
return;
|
|
|
|
error = xwimp_get_pointer_info(&pointer);
|
|
if (error) {
|
|
LOG(("xwimp_get_pointer_info: 0x%x: %s",
|
|
error->errnum, error->errmess));
|
|
warn_user("WimpError", error->errmess);
|
|
return;
|
|
}
|
|
|
|
/* Process the drag tracker, if one is active. */
|
|
|
|
if (ro_mouse_drag_track_callback != NULL)
|
|
ro_mouse_drag_track_callback(&pointer, ro_mouse_drag_data);
|
|
|
|
/* Process the window tracker, if one is active. */
|
|
|
|
if (ro_mouse_poll_track_callback != NULL)
|
|
ro_mouse_poll_track_callback(&pointer, ro_mouse_poll_data);
|
|
}
|
|
|
|
|
|
/**
|
|
* Start a drag, providing a function to be called when the Wimp_DragEnd event
|
|
* is received and optionally a tracking function to be called on null polls
|
|
* in between times.
|
|
*
|
|
* \param *drag_end Callback for when the drag terminates, or NULL for none.
|
|
* \param *drag_track Callback for mouse tracking during the drag, or NULL for
|
|
* none.
|
|
* \param *drag_cancel Callback for cancelling the drag, or NULL if the drag
|
|
* can't be cancelled.
|
|
* \param *data Data to be passed to the callback functions, or NULL.
|
|
*/
|
|
|
|
void ro_mouse_drag_start(void (*drag_end)(wimp_dragged *dragged, void *data),
|
|
void (*drag_track)(wimp_pointer *pointer, void *data),
|
|
void (*drag_cancel)(void *data), void *data)
|
|
{
|
|
/* A drag should never be started when one is already in progress. */
|
|
|
|
assert(ro_mouse_drag_end_callback == NULL &&
|
|
ro_mouse_drag_track_callback == NULL &&
|
|
ro_mouse_drag_cancel_callback == NULL &&
|
|
ro_mouse_drag_data == NULL);
|
|
|
|
ro_mouse_drag_end_callback = drag_end;
|
|
ro_mouse_drag_track_callback = drag_track;
|
|
ro_mouse_drag_cancel_callback = drag_cancel;
|
|
ro_mouse_drag_data = data;
|
|
|
|
/* The Wimp sends a PointerLeaving event when Wimp_DragBox is called,
|
|
* so we mask out the next event that will come our way.
|
|
*/
|
|
|
|
ro_mouse_ignore_leaving_event = true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Process Wimp_DragEnd events by terminating an active drag track and passing
|
|
* the details on to any registered event handler.
|
|
*
|
|
* \param *dragged The Wimp_DragEnd data block.
|
|
*/
|
|
|
|
void ro_mouse_drag_end(wimp_dragged *dragged)
|
|
{
|
|
if (ro_mouse_drag_end_callback != NULL)
|
|
ro_mouse_drag_end_callback(dragged, ro_mouse_drag_data);
|
|
else
|
|
warn_user("WimpError", "No callback");
|
|
|
|
/* Wimp_DragEnd is a one-shot event, so clear the data ready for
|
|
* another claimant.
|
|
*/
|
|
|
|
ro_mouse_drag_end_callback = NULL;
|
|
ro_mouse_drag_track_callback = NULL;
|
|
ro_mouse_drag_cancel_callback = NULL;
|
|
ro_mouse_drag_data = NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* Start tracking the mouse in a window, providing a function to be called on
|
|
* null polls and optionally one to be called when it leaves the window.
|
|
*
|
|
* \param *poll_end Callback for when the pointer leaves the window, or
|
|
* NULL for none. Claimants can receive *leaving==NULL if
|
|
* a new tracker is started before a PointerLeaving event
|
|
* is received.
|
|
* \param *poll_track Callback for mouse tracking while the pointer remains
|
|
* in the window, or NULL for none.
|
|
* \param *data Data to be passed to the callback functions, or NULL.
|
|
*/
|
|
|
|
void ro_mouse_track_start(void (*poll_end)(wimp_leaving *leaving, void *data),
|
|
void (*poll_track)(wimp_pointer *pointer, void *data),
|
|
void *data)
|
|
{
|
|
/* It should never be possible for the mouse to be in two windows
|
|
* at the same time! However, some third-party extensions to RISC OS
|
|
* appear to make this possible (MouseAxess being one), so in the
|
|
* event that there's still a claimant we tidy them up first and then
|
|
* log the fact in case there are any unexpected consequences.
|
|
*
|
|
* NB: The Poll End callback will get called with *leaving == NULL in
|
|
* this situation, as there's no PointerLeaving event to pass on.
|
|
*/
|
|
|
|
if (ro_mouse_poll_end_callback != NULL ||
|
|
ro_mouse_poll_track_callback != NULL ||
|
|
ro_mouse_poll_data != NULL) {
|
|
if (ro_mouse_poll_end_callback != NULL &&
|
|
ro_mouse_ignore_leaving_event == false)
|
|
ro_mouse_poll_end_callback(NULL, ro_mouse_poll_data);
|
|
|
|
LOG(("Unexpected mouse track termination."));
|
|
|
|
ro_mouse_ignore_leaving_event = false;
|
|
ro_mouse_poll_end_callback = NULL;
|
|
ro_mouse_poll_track_callback = NULL;
|
|
ro_mouse_poll_data = NULL;
|
|
}
|
|
|
|
/* Now record details of the new claimant. */
|
|
|
|
ro_mouse_poll_end_callback = poll_end;
|
|
ro_mouse_poll_track_callback = poll_track;
|
|
ro_mouse_poll_data = data;
|
|
}
|
|
|
|
|
|
/**
|
|
* Process Wimp_PointerLeaving events by terminating an active mouse track and
|
|
* passing the details on to any registered event handler.
|
|
*
|
|
* If the ignore mask is set, we don't pass the event on to the client as it
|
|
* is assumed that it's a result of starting a Wimp_DragBox operation.
|
|
*
|
|
* \param *leaving The Wimp_PointerLeaving data block.
|
|
*/
|
|
|
|
void ro_mouse_pointer_leaving_window(wimp_leaving *leaving)
|
|
{
|
|
if (ro_mouse_poll_end_callback != NULL &&
|
|
ro_mouse_ignore_leaving_event == false)
|
|
ro_mouse_poll_end_callback(leaving, ro_mouse_poll_data);
|
|
|
|
ro_mouse_ignore_leaving_event = false;
|
|
|
|
/* Poll tracking is a one-shot event, so clear the data ready for
|
|
* another claimant.
|
|
*/
|
|
|
|
ro_mouse_poll_end_callback = NULL;
|
|
ro_mouse_poll_track_callback = NULL;
|
|
ro_mouse_poll_data = NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* Kill any tracking events if the data pointers match the supplied pointer.
|
|
*
|
|
* \param *data The data of the client to be killed.
|
|
*/
|
|
|
|
void ro_mouse_kill(void *data)
|
|
{
|
|
if (data == ro_mouse_drag_data) {
|
|
ro_mouse_drag_end_callback = NULL;
|
|
ro_mouse_drag_track_callback = NULL;
|
|
ro_mouse_drag_cancel_callback = NULL;
|
|
ro_mouse_drag_data = NULL;
|
|
}
|
|
|
|
if (data == ro_mouse_poll_data) {
|
|
ro_mouse_poll_end_callback = NULL;
|
|
ro_mouse_poll_track_callback = NULL;
|
|
ro_mouse_poll_data = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return the desired polling interval to allow the mouse tracking to be
|
|
* carried out.
|
|
*
|
|
* \return Desired poll interval (0 for none required).
|
|
*/
|
|
|
|
os_t ro_mouse_poll_interval(void)
|
|
{
|
|
if (ro_mouse_drag_track_callback != NULL)
|
|
return 4;
|
|
|
|
if (ro_mouse_poll_track_callback != NULL)
|
|
return 10;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|