Chris Salch
18 years ago
committed by
Peter Hutterer
parent
c1f7f8c3d2
commit
a9d72b40fb
5 changed files with 334 additions and 2 deletions
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/*
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* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany. |
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* Copyright 1993 by David Dawes <dawes@xfree86.org> |
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* Copyright 2002 by SuSE Linux AG, Author: Egbert Eich |
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* Copyright 1994-2002 by The XFree86 Project, Inc. |
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* Copyright 2002 by Paul Elliott |
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* (Ported from xf86-input-mouse, above copyrights taken from there) |
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* Copyright 2008 by Chris Salch |
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* |
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* Permission to use, copy, modify, distribute, and sell this software |
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* and its documentation for any purpose is hereby granted without |
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* fee, provided that the above copyright notice appear in all copies |
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* and that both that copyright notice and this permission notice |
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* appear in supporting documentation, and that the name of the authors |
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* not be used in advertising or publicity pertaining to distribution of the |
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* software without specific, written prior permission. The authors make no |
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* representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied |
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* warranty. |
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* |
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* THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN |
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* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS |
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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* |
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*/ |
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/* Mouse wheel emulation code. */ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "evdev.h" |
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#define MSE_MAXBUTTONS 32 |
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#define WHEEL_NOT_CONFIGURED 0 |
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/* Local Funciton Prototypes */ |
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static BOOL EvdevWheelEmuHandleButtonMap(InputInfoPtr pInfo, WheelAxisPtr pAxis, char *axis_name); |
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static void EvdevWheelEmuInertia(InputInfoPtr pInfo, WheelAxisPtr axis, int value); |
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/* Filter mouse button events */ |
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BOOL |
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EvdevWheelEmuFilterButton(InputInfoPtr pInfo, unsigned int button, int value) |
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{ |
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EvdevPtr pEvdev = (EvdevPtr)pInfo->private; |
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/* Has wheel emulation been configured to be enabled? */ |
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if (!pEvdev->emulateWheel.enabled) |
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return FALSE; |
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/* Check for EmulateWheelButton */ |
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if (pEvdev->emulateWheel.button == button) { |
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pEvdev->emulateWheel.button_state = value; |
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return TRUE; |
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} |
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/* Don't care about this event */ |
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return FALSE; |
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} |
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/* Filter mouse wheel events */ |
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BOOL |
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EvdevWheelEmuFilterMotion(InputInfoPtr pInfo, struct input_event *pEv) |
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{ |
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EvdevPtr pEvdev = (EvdevPtr)pInfo->private; |
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WheelAxisPtr pAxis = NULL; |
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int value = pEv->value; |
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/* Has wheel emulation been configured to be enabled? */ |
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if (!pEvdev->emulateWheel.enabled) |
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return FALSE; |
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/* Handle our motion events if the emuWheel button is pressed*/ |
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if (pEvdev->emulateWheel.button_state) { |
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/* We don't want to intercept real mouse wheel events */ |
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switch(pEv->code) { |
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case REL_X: |
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pAxis = &(pEvdev->emulateWheel.X); |
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break; |
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case REL_Y: |
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pAxis = &(pEvdev->emulateWheel.Y); |
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break; |
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default: |
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break; |
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} |
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/* If we found REL_X or REL_Y, emulate a mouse wheel */ |
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if (pAxis) |
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EvdevWheelEmuInertia(pInfo, pAxis, value); |
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/* Eat motion events while emulateWheel button pressed. */ |
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return TRUE; |
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} |
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return FALSE; |
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} |
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/* Simulate inertia for our emulated mouse wheel */ |
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static void |
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EvdevWheelEmuInertia(InputInfoPtr pInfo, WheelAxisPtr axis, int value) |
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{ |
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EvdevPtr pEvdev = (EvdevPtr)pInfo->private; |
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int button; |
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int inertia; |
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/* if this axis has not been configured, just eat the motion */ |
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if (!axis->up_button) |
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return; |
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axis->traveled_distance += value; |
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if (axis->traveled_distance < 0) { |
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button = axis->up_button; |
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inertia = -pEvdev->emulateWheel.inertia; |
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} else { |
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button = axis->down_button; |
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inertia = pEvdev->emulateWheel.inertia; |
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} |
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/* Produce button press events for wheel motion */ |
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while(abs(axis->traveled_distance) > pEvdev->emulateWheel.inertia) { |
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axis->traveled_distance -= inertia; |
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xf86PostButtonEvent(pInfo->dev, 0, button, 1, 0, 0); |
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xf86PostButtonEvent(pInfo->dev, 0, button, 0, 0, 0); |
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} |
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} |
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/* Handle button mapping here to avoid code duplication,
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returns true if a button mapping was found. */ |
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static BOOL |
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EvdevWheelEmuHandleButtonMap(InputInfoPtr pInfo, WheelAxisPtr pAxis, char* axis_name) |
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{ |
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EvdevPtr pEvdev = (EvdevPtr)pInfo->private; |
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char *option_string; |
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pAxis->up_button = WHEEL_NOT_CONFIGURED; |
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/* Check to see if there is configuration for this axis */ |
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option_string = xf86SetStrOption(pInfo->options, axis_name, NULL); |
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if (option_string) { |
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int up_button = 0; |
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int down_button = 0; |
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char *msg = NULL; |
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if ((sscanf(option_string, "%d %d", &up_button, &down_button) == 2) && |
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((up_button > 0) && (up_button <= MSE_MAXBUTTONS)) && |
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((down_button > 0) && (down_button <= MSE_MAXBUTTONS))) { |
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/* Use xstrdup to allocate a string for us */ |
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msg = xstrdup("buttons XX and YY"); |
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if (msg) |
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sprintf(msg, "buttons %d and %d", up_button, down_button); |
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pAxis->up_button = up_button; |
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pAxis->down_button = down_button; |
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/* Update the number of buttons if needed */ |
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if (up_button > pEvdev->buttons) pEvdev->buttons = up_button; |
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if (down_button > pEvdev->buttons) pEvdev->buttons = down_button; |
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} else { |
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xf86Msg(X_WARNING, "%s: Invalid %s value:\"%s\"\n", |
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pInfo->name, axis_name, option_string); |
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} |
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/* Clean up and log what happened */ |
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if (msg) { |
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xf86Msg(X_CONFIG, "%s: %s: %s\n",pInfo->name, axis_name, msg); |
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xfree(msg); |
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return TRUE; |
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} |
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} |
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return FALSE; |
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} |
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/* Setup the basic configuration options used by mouse wheel emulation */ |
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void |
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EvdevWheelEmuPreInit(InputInfoPtr pInfo) |
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{ |
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EvdevPtr pEvdev = (EvdevPtr)pInfo->private; |
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pEvdev->emulateWheel.enabled = FALSE; |
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if (xf86SetBoolOption(pInfo->options, "EmulateWheel", FALSE)) { |
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int wheelButton; |
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int inertia; |
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pEvdev->emulateWheel.enabled = TRUE; |
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wheelButton = xf86SetIntOption(pInfo->options, |
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"EmulateWheelButton", 4); |
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if ((wheelButton < 0) || (wheelButton > MSE_MAXBUTTONS)) { |
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xf86Msg(X_WARNING, "%s: Invalid EmulateWheelButton value: %d\n", |
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pInfo->name, wheelButton); |
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xf86Msg(X_WARNING, "%s: Wheel emulation disabled.\n", pInfo->name); |
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pEvdev->emulateWheel.enabled = FALSE; |
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return; |
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} |
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pEvdev->emulateWheel.button = wheelButton; |
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inertia = xf86SetIntOption(pInfo->options, "EmulateWheelInertia", 10); |
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if (inertia <= 0) { |
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xf86Msg(X_WARNING, "%s: Invalid EmulateWheelInertia value: %d\n", |
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pInfo->name, inertia); |
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xf86Msg(X_WARNING, "%s: Using built-in inertia value.\n", |
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pInfo->name); |
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inertia = 10; |
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} |
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pEvdev->emulateWheel.inertia = inertia; |
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/* Configure the Y axis or default it */ |
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if (!EvdevWheelEmuHandleButtonMap(pInfo, &(pEvdev->emulateWheel.Y), |
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"YAxisMapping")) { |
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/* Default the Y axis to sane values */ |
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pEvdev->emulateWheel.Y.up_button = 4; |
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pEvdev->emulateWheel.Y.down_button = 5; |
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/* Simpler to check just the largest value in this case */ |
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/* XXX: we should post this to the server */ |
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if (5 > pEvdev->buttons) |
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pEvdev->buttons = 5; |
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/* Display default Configuration */ |
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xf86Msg(X_CONFIG, "%s: YAxisMapping: buttons %d and %d\n", |
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pInfo->name, pEvdev->emulateWheel.Y.up_button, |
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pEvdev->emulateWheel.Y.down_button); |
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} |
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/* This axis should default to an unconfigured state as most people
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are not going to expect a Horizontal wheel. */ |
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EvdevWheelEmuHandleButtonMap(pInfo, &(pEvdev->emulateWheel.X), |
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"XAxisMapping"); |
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/* Used by the inertia code */ |
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pEvdev->emulateWheel.X.traveled_distance = 0; |
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pEvdev->emulateWheel.Y.traveled_distance = 0; |
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xf86Msg(X_CONFIG, "%s: EmulateWheelButton: %d, EmulateWheelInertia: %d\n", |
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pInfo->name, pEvdev->emulateWheel.button, inertia); |
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} |
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} |
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