mirror of
https://github.com/gyurix1968/guacamole-client.git
synced 2025-09-07 21:51:23 +00:00
Migrate to minify-maven-plugin and Google Closure Compiler.
This commit is contained in:
Michael Jumper
815
guacamole-common-js/src/main/webapp/modules/Mouse.js
Normal file
815
guacamole-common-js/src/main/webapp/modules/Mouse.js
Normal file
@@ -0,0 +1,815 @@
|
||||
/*
|
||||
* Copyright (C) 2013 Glyptodon LLC
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
var Guacamole = Guacamole || {};
|
||||
|
||||
/**
|
||||
* Provides cross-browser mouse events for a given element. The events of
|
||||
* the given element are automatically populated with handlers that translate
|
||||
* mouse events into a non-browser-specific event provided by the
|
||||
* Guacamole.Mouse instance.
|
||||
*
|
||||
* @constructor
|
||||
* @param {Element} element The Element to use to provide mouse events.
|
||||
*/
|
||||
Guacamole.Mouse = function(element) {
|
||||
|
||||
/**
|
||||
* Reference to this Guacamole.Mouse.
|
||||
* @private
|
||||
*/
|
||||
var guac_mouse = this;
|
||||
|
||||
/**
|
||||
* The number of mousemove events to require before re-enabling mouse
|
||||
* event handling after receiving a touch event.
|
||||
*/
|
||||
this.touchMouseThreshold = 3;
|
||||
|
||||
/**
|
||||
* The minimum amount of pixels scrolled required for a single scroll button
|
||||
* click.
|
||||
*/
|
||||
this.scrollThreshold = 120;
|
||||
|
||||
/**
|
||||
* The number of pixels to scroll per line.
|
||||
*/
|
||||
this.PIXELS_PER_LINE = 40;
|
||||
|
||||
/**
|
||||
* The number of pixels to scroll per page.
|
||||
*/
|
||||
this.PIXELS_PER_PAGE = 640;
|
||||
|
||||
/**
|
||||
* The current mouse state. The properties of this state are updated when
|
||||
* mouse events fire. This state object is also passed in as a parameter to
|
||||
* the handler of any mouse events.
|
||||
*
|
||||
* @type Guacamole.Mouse.State
|
||||
*/
|
||||
this.currentState = new Guacamole.Mouse.State(
|
||||
0, 0,
|
||||
false, false, false, false, false
|
||||
);
|
||||
|
||||
/**
|
||||
* Fired whenever the user presses a mouse button down over the element
|
||||
* associated with this Guacamole.Mouse.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousedown = null;
|
||||
|
||||
/**
|
||||
* Fired whenever the user releases a mouse button down over the element
|
||||
* associated with this Guacamole.Mouse.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmouseup = null;
|
||||
|
||||
/**
|
||||
* Fired whenever the user moves the mouse over the element associated with
|
||||
* this Guacamole.Mouse.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousemove = null;
|
||||
|
||||
/**
|
||||
* Counter of mouse events to ignore. This decremented by mousemove, and
|
||||
* while non-zero, mouse events will have no effect.
|
||||
* @private
|
||||
*/
|
||||
var ignore_mouse = 0;
|
||||
|
||||
/**
|
||||
* Cumulative scroll delta amount. This value is accumulated through scroll
|
||||
* events and results in scroll button clicks if it exceeds a certain
|
||||
* threshold.
|
||||
*/
|
||||
var scroll_delta = 0;
|
||||
|
||||
function cancelEvent(e) {
|
||||
e.stopPropagation();
|
||||
if (e.preventDefault) e.preventDefault();
|
||||
e.returnValue = false;
|
||||
}
|
||||
|
||||
// Block context menu so right-click gets sent properly
|
||||
element.addEventListener("contextmenu", function(e) {
|
||||
cancelEvent(e);
|
||||
}, false);
|
||||
|
||||
element.addEventListener("mousemove", function(e) {
|
||||
|
||||
cancelEvent(e);
|
||||
|
||||
// If ignoring events, decrement counter
|
||||
if (ignore_mouse) {
|
||||
ignore_mouse--;
|
||||
return;
|
||||
}
|
||||
|
||||
guac_mouse.currentState.fromClientPosition(element, e.clientX, e.clientY);
|
||||
|
||||
if (guac_mouse.onmousemove)
|
||||
guac_mouse.onmousemove(guac_mouse.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("mousedown", function(e) {
|
||||
|
||||
cancelEvent(e);
|
||||
|
||||
// Do not handle if ignoring events
|
||||
if (ignore_mouse)
|
||||
return;
|
||||
|
||||
switch (e.button) {
|
||||
case 0:
|
||||
guac_mouse.currentState.left = true;
|
||||
break;
|
||||
case 1:
|
||||
guac_mouse.currentState.middle = true;
|
||||
break;
|
||||
case 2:
|
||||
guac_mouse.currentState.right = true;
|
||||
break;
|
||||
}
|
||||
|
||||
if (guac_mouse.onmousedown)
|
||||
guac_mouse.onmousedown(guac_mouse.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("mouseup", function(e) {
|
||||
|
||||
cancelEvent(e);
|
||||
|
||||
// Do not handle if ignoring events
|
||||
if (ignore_mouse)
|
||||
return;
|
||||
|
||||
switch (e.button) {
|
||||
case 0:
|
||||
guac_mouse.currentState.left = false;
|
||||
break;
|
||||
case 1:
|
||||
guac_mouse.currentState.middle = false;
|
||||
break;
|
||||
case 2:
|
||||
guac_mouse.currentState.right = false;
|
||||
break;
|
||||
}
|
||||
|
||||
if (guac_mouse.onmouseup)
|
||||
guac_mouse.onmouseup(guac_mouse.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("mouseout", function(e) {
|
||||
|
||||
// Get parent of the element the mouse pointer is leaving
|
||||
if (!e) e = window.event;
|
||||
|
||||
// Check that mouseout is due to actually LEAVING the element
|
||||
var target = e.relatedTarget || e.toElement;
|
||||
while (target != null) {
|
||||
if (target === element)
|
||||
return;
|
||||
target = target.parentNode;
|
||||
}
|
||||
|
||||
cancelEvent(e);
|
||||
|
||||
// Release all buttons
|
||||
if (guac_mouse.currentState.left
|
||||
|| guac_mouse.currentState.middle
|
||||
|| guac_mouse.currentState.right) {
|
||||
|
||||
guac_mouse.currentState.left = false;
|
||||
guac_mouse.currentState.middle = false;
|
||||
guac_mouse.currentState.right = false;
|
||||
|
||||
if (guac_mouse.onmouseup)
|
||||
guac_mouse.onmouseup(guac_mouse.currentState);
|
||||
}
|
||||
|
||||
}, false);
|
||||
|
||||
// Override selection on mouse event element.
|
||||
element.addEventListener("selectstart", function(e) {
|
||||
cancelEvent(e);
|
||||
}, false);
|
||||
|
||||
// Ignore all pending mouse events when touch events are the apparent source
|
||||
function ignorePendingMouseEvents() { ignore_mouse = guac_mouse.touchMouseThreshold; }
|
||||
|
||||
element.addEventListener("touchmove", ignorePendingMouseEvents, false);
|
||||
element.addEventListener("touchstart", ignorePendingMouseEvents, false);
|
||||
element.addEventListener("touchend", ignorePendingMouseEvents, false);
|
||||
|
||||
// Scroll wheel support
|
||||
function mousewheel_handler(e) {
|
||||
|
||||
// Determine approximate scroll amount (in pixels)
|
||||
var delta = e.deltaY || -e.wheelDeltaY || -e.wheelDelta;
|
||||
|
||||
// If successfully retrieved scroll amount, convert to pixels if not
|
||||
// already in pixels
|
||||
if (delta) {
|
||||
|
||||
// Convert to pixels if delta was lines
|
||||
if (e.deltaMode === 1)
|
||||
delta = e.deltaY * guac_mouse.PIXELS_PER_LINE;
|
||||
|
||||
// Convert to pixels if delta was pages
|
||||
else if (e.deltaMode === 2)
|
||||
delta = e.deltaY * guac_mouse.PIXELS_PER_PAGE;
|
||||
|
||||
}
|
||||
|
||||
// Otherwise, assume legacy mousewheel event and line scrolling
|
||||
else
|
||||
delta = e.detail * guac_mouse.PIXELS_PER_LINE;
|
||||
|
||||
// Update overall delta
|
||||
scroll_delta += delta;
|
||||
|
||||
// Up
|
||||
while (scroll_delta <= -guac_mouse.scrollThreshold) {
|
||||
|
||||
if (guac_mouse.onmousedown) {
|
||||
guac_mouse.currentState.up = true;
|
||||
guac_mouse.onmousedown(guac_mouse.currentState);
|
||||
}
|
||||
|
||||
if (guac_mouse.onmouseup) {
|
||||
guac_mouse.currentState.up = false;
|
||||
guac_mouse.onmouseup(guac_mouse.currentState);
|
||||
}
|
||||
|
||||
scroll_delta += guac_mouse.scrollThreshold;
|
||||
|
||||
}
|
||||
|
||||
// Down
|
||||
while (scroll_delta >= guac_mouse.scrollThreshold) {
|
||||
|
||||
if (guac_mouse.onmousedown) {
|
||||
guac_mouse.currentState.down = true;
|
||||
guac_mouse.onmousedown(guac_mouse.currentState);
|
||||
}
|
||||
|
||||
if (guac_mouse.onmouseup) {
|
||||
guac_mouse.currentState.down = false;
|
||||
guac_mouse.onmouseup(guac_mouse.currentState);
|
||||
}
|
||||
|
||||
scroll_delta -= guac_mouse.scrollThreshold;
|
||||
|
||||
}
|
||||
|
||||
cancelEvent(e);
|
||||
|
||||
}
|
||||
|
||||
element.addEventListener('DOMMouseScroll', mousewheel_handler, false);
|
||||
element.addEventListener('mousewheel', mousewheel_handler, false);
|
||||
element.addEventListener('wheel', mousewheel_handler, false);
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* Simple container for properties describing the state of a mouse.
|
||||
*
|
||||
* @constructor
|
||||
* @param {Number} x The X position of the mouse pointer in pixels.
|
||||
* @param {Number} y The Y position of the mouse pointer in pixels.
|
||||
* @param {Boolean} left Whether the left mouse button is pressed.
|
||||
* @param {Boolean} middle Whether the middle mouse button is pressed.
|
||||
* @param {Boolean} right Whether the right mouse button is pressed.
|
||||
* @param {Boolean} up Whether the up mouse button is pressed (the fourth
|
||||
* button, usually part of a scroll wheel).
|
||||
* @param {Boolean} down Whether the down mouse button is pressed (the fifth
|
||||
* button, usually part of a scroll wheel).
|
||||
*/
|
||||
Guacamole.Mouse.State = function(x, y, left, middle, right, up, down) {
|
||||
|
||||
/**
|
||||
* Reference to this Guacamole.Mouse.State.
|
||||
* @private
|
||||
*/
|
||||
var guac_state = this;
|
||||
|
||||
/**
|
||||
* The current X position of the mouse pointer.
|
||||
* @type Number
|
||||
*/
|
||||
this.x = x;
|
||||
|
||||
/**
|
||||
* The current Y position of the mouse pointer.
|
||||
* @type Number
|
||||
*/
|
||||
this.y = y;
|
||||
|
||||
/**
|
||||
* Whether the left mouse button is currently pressed.
|
||||
* @type Boolean
|
||||
*/
|
||||
this.left = left;
|
||||
|
||||
/**
|
||||
* Whether the middle mouse button is currently pressed.
|
||||
* @type Boolean
|
||||
*/
|
||||
this.middle = middle
|
||||
|
||||
/**
|
||||
* Whether the right mouse button is currently pressed.
|
||||
* @type Boolean
|
||||
*/
|
||||
this.right = right;
|
||||
|
||||
/**
|
||||
* Whether the up mouse button is currently pressed. This is the fourth
|
||||
* mouse button, associated with upward scrolling of the mouse scroll
|
||||
* wheel.
|
||||
* @type Boolean
|
||||
*/
|
||||
this.up = up;
|
||||
|
||||
/**
|
||||
* Whether the down mouse button is currently pressed. This is the fifth
|
||||
* mouse button, associated with downward scrolling of the mouse scroll
|
||||
* wheel.
|
||||
* @type Boolean
|
||||
*/
|
||||
this.down = down;
|
||||
|
||||
/**
|
||||
* Updates the position represented within this state object by the given
|
||||
* element and clientX/clientY coordinates (commonly available within event
|
||||
* objects). Position is translated from clientX/clientY (relative to
|
||||
* viewport) to element-relative coordinates.
|
||||
*
|
||||
* @param {Element} element The element the coordinates should be relative
|
||||
* to.
|
||||
* @param {Number} clientX The X coordinate to translate, viewport-relative.
|
||||
* @param {Number} clientY The Y coordinate to translate, viewport-relative.
|
||||
*/
|
||||
this.fromClientPosition = function(element, clientX, clientY) {
|
||||
|
||||
guac_state.x = clientX - element.offsetLeft;
|
||||
guac_state.y = clientY - element.offsetTop;
|
||||
|
||||
// This is all JUST so we can get the mouse position within the element
|
||||
var parent = element.offsetParent;
|
||||
while (parent && !(parent === document.body)) {
|
||||
guac_state.x -= parent.offsetLeft - parent.scrollLeft;
|
||||
guac_state.y -= parent.offsetTop - parent.scrollTop;
|
||||
|
||||
parent = parent.offsetParent;
|
||||
}
|
||||
|
||||
// Element ultimately depends on positioning within document body,
|
||||
// take document scroll into account.
|
||||
if (parent) {
|
||||
var documentScrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;
|
||||
var documentScrollTop = document.body.scrollTop || document.documentElement.scrollTop;
|
||||
|
||||
guac_state.x -= parent.offsetLeft - documentScrollLeft;
|
||||
guac_state.y -= parent.offsetTop - documentScrollTop;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* Provides cross-browser relative touch event translation for a given element.
|
||||
*
|
||||
* Touch events are translated into mouse events as if the touches occurred
|
||||
* on a touchpad (drag to push the mouse pointer, tap to click).
|
||||
*
|
||||
* @constructor
|
||||
* @param {Element} element The Element to use to provide touch events.
|
||||
*/
|
||||
Guacamole.Mouse.Touchpad = function(element) {
|
||||
|
||||
/**
|
||||
* Reference to this Guacamole.Mouse.Touchpad.
|
||||
* @private
|
||||
*/
|
||||
var guac_touchpad = this;
|
||||
|
||||
/**
|
||||
* The distance a two-finger touch must move per scrollwheel event, in
|
||||
* pixels.
|
||||
*/
|
||||
this.scrollThreshold = 20 * (window.devicePixelRatio || 1);
|
||||
|
||||
/**
|
||||
* The maximum number of milliseconds to wait for a touch to end for the
|
||||
* gesture to be considered a click.
|
||||
*/
|
||||
this.clickTimingThreshold = 250;
|
||||
|
||||
/**
|
||||
* The maximum number of pixels to allow a touch to move for the gesture to
|
||||
* be considered a click.
|
||||
*/
|
||||
this.clickMoveThreshold = 10 * (window.devicePixelRatio || 1);
|
||||
|
||||
/**
|
||||
* The current mouse state. The properties of this state are updated when
|
||||
* mouse events fire. This state object is also passed in as a parameter to
|
||||
* the handler of any mouse events.
|
||||
*
|
||||
* @type Guacamole.Mouse.State
|
||||
*/
|
||||
this.currentState = new Guacamole.Mouse.State(
|
||||
0, 0,
|
||||
false, false, false, false, false
|
||||
);
|
||||
|
||||
/**
|
||||
* Fired whenever a mouse button is effectively pressed. This can happen
|
||||
* as part of a "click" gesture initiated by the user by tapping one
|
||||
* or more fingers over the touchpad element, as part of a "scroll"
|
||||
* gesture initiated by dragging two fingers up or down, etc.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousedown = null;
|
||||
|
||||
/**
|
||||
* Fired whenever a mouse button is effectively released. This can happen
|
||||
* as part of a "click" gesture initiated by the user by tapping one
|
||||
* or more fingers over the touchpad element, as part of a "scroll"
|
||||
* gesture initiated by dragging two fingers up or down, etc.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmouseup = null;
|
||||
|
||||
/**
|
||||
* Fired whenever the user moves the mouse by dragging their finger over
|
||||
* the touchpad element.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousemove = null;
|
||||
|
||||
var touch_count = 0;
|
||||
var last_touch_x = 0;
|
||||
var last_touch_y = 0;
|
||||
var last_touch_time = 0;
|
||||
var pixels_moved = 0;
|
||||
|
||||
var touch_buttons = {
|
||||
1: "left",
|
||||
2: "right",
|
||||
3: "middle"
|
||||
};
|
||||
|
||||
var gesture_in_progress = false;
|
||||
var click_release_timeout = null;
|
||||
|
||||
element.addEventListener("touchend", function(e) {
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// If we're handling a gesture AND this is the last touch
|
||||
if (gesture_in_progress && e.touches.length == 0) {
|
||||
|
||||
var time = new Date().getTime();
|
||||
|
||||
// Get corresponding mouse button
|
||||
var button = touch_buttons[touch_count];
|
||||
|
||||
// If mouse already down, release anad clear timeout
|
||||
if (guac_touchpad.currentState[button]) {
|
||||
|
||||
// Fire button up event
|
||||
guac_touchpad.currentState[button] = false;
|
||||
if (guac_touchpad.onmouseup)
|
||||
guac_touchpad.onmouseup(guac_touchpad.currentState);
|
||||
|
||||
// Clear timeout, if set
|
||||
if (click_release_timeout) {
|
||||
window.clearTimeout(click_release_timeout);
|
||||
click_release_timeout = null;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// If single tap detected (based on time and distance)
|
||||
if (time - last_touch_time <= guac_touchpad.clickTimingThreshold
|
||||
&& pixels_moved < guac_touchpad.clickMoveThreshold) {
|
||||
|
||||
// Fire button down event
|
||||
guac_touchpad.currentState[button] = true;
|
||||
if (guac_touchpad.onmousedown)
|
||||
guac_touchpad.onmousedown(guac_touchpad.currentState);
|
||||
|
||||
// Delay mouse up - mouse up should be canceled if
|
||||
// touchstart within timeout.
|
||||
click_release_timeout = window.setTimeout(function() {
|
||||
|
||||
// Fire button up event
|
||||
guac_touchpad.currentState[button] = false;
|
||||
if (guac_touchpad.onmouseup)
|
||||
guac_touchpad.onmouseup(guac_touchpad.currentState);
|
||||
|
||||
// Gesture now over
|
||||
gesture_in_progress = false;
|
||||
|
||||
}, guac_touchpad.clickTimingThreshold);
|
||||
|
||||
}
|
||||
|
||||
// If we're not waiting to see if this is a click, stop gesture
|
||||
if (!click_release_timeout)
|
||||
gesture_in_progress = false;
|
||||
|
||||
}
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("touchstart", function(e) {
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// Track number of touches, but no more than three
|
||||
touch_count = Math.min(e.touches.length, 3);
|
||||
|
||||
// Clear timeout, if set
|
||||
if (click_release_timeout) {
|
||||
window.clearTimeout(click_release_timeout);
|
||||
click_release_timeout = null;
|
||||
}
|
||||
|
||||
// Record initial touch location and time for touch movement
|
||||
// and tap gestures
|
||||
if (!gesture_in_progress) {
|
||||
|
||||
// Stop mouse events while touching
|
||||
gesture_in_progress = true;
|
||||
|
||||
// Record touch location and time
|
||||
var starting_touch = e.touches[0];
|
||||
last_touch_x = starting_touch.clientX;
|
||||
last_touch_y = starting_touch.clientY;
|
||||
last_touch_time = new Date().getTime();
|
||||
pixels_moved = 0;
|
||||
|
||||
}
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("touchmove", function(e) {
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// Get change in touch location
|
||||
var touch = e.touches[0];
|
||||
var delta_x = touch.clientX - last_touch_x;
|
||||
var delta_y = touch.clientY - last_touch_y;
|
||||
|
||||
// Track pixels moved
|
||||
pixels_moved += Math.abs(delta_x) + Math.abs(delta_y);
|
||||
|
||||
// If only one touch involved, this is mouse move
|
||||
if (touch_count == 1) {
|
||||
|
||||
// Calculate average velocity in Manhatten pixels per millisecond
|
||||
var velocity = pixels_moved / (new Date().getTime() - last_touch_time);
|
||||
|
||||
// Scale mouse movement relative to velocity
|
||||
var scale = 1 + velocity;
|
||||
|
||||
// Update mouse location
|
||||
guac_touchpad.currentState.x += delta_x*scale;
|
||||
guac_touchpad.currentState.y += delta_y*scale;
|
||||
|
||||
// Prevent mouse from leaving screen
|
||||
|
||||
if (guac_touchpad.currentState.x < 0)
|
||||
guac_touchpad.currentState.x = 0;
|
||||
else if (guac_touchpad.currentState.x >= element.offsetWidth)
|
||||
guac_touchpad.currentState.x = element.offsetWidth - 1;
|
||||
|
||||
if (guac_touchpad.currentState.y < 0)
|
||||
guac_touchpad.currentState.y = 0;
|
||||
else if (guac_touchpad.currentState.y >= element.offsetHeight)
|
||||
guac_touchpad.currentState.y = element.offsetHeight - 1;
|
||||
|
||||
// Fire movement event, if defined
|
||||
if (guac_touchpad.onmousemove)
|
||||
guac_touchpad.onmousemove(guac_touchpad.currentState);
|
||||
|
||||
// Update touch location
|
||||
last_touch_x = touch.clientX;
|
||||
last_touch_y = touch.clientY;
|
||||
|
||||
}
|
||||
|
||||
// Interpret two-finger swipe as scrollwheel
|
||||
else if (touch_count == 2) {
|
||||
|
||||
// If change in location passes threshold for scroll
|
||||
if (Math.abs(delta_y) >= guac_touchpad.scrollThreshold) {
|
||||
|
||||
// Decide button based on Y movement direction
|
||||
var button;
|
||||
if (delta_y > 0) button = "down";
|
||||
else button = "up";
|
||||
|
||||
// Fire button down event
|
||||
guac_touchpad.currentState[button] = true;
|
||||
if (guac_touchpad.onmousedown)
|
||||
guac_touchpad.onmousedown(guac_touchpad.currentState);
|
||||
|
||||
// Fire button up event
|
||||
guac_touchpad.currentState[button] = false;
|
||||
if (guac_touchpad.onmouseup)
|
||||
guac_touchpad.onmouseup(guac_touchpad.currentState);
|
||||
|
||||
// Only update touch location after a scroll has been
|
||||
// detected
|
||||
last_touch_x = touch.clientX;
|
||||
last_touch_y = touch.clientY;
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}, false);
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* Provides cross-browser absolute touch event translation for a given element.
|
||||
*
|
||||
* Touch events are translated into mouse events as if the touches occurred
|
||||
* on a touchscreen (tapping anywhere on the screen clicks at that point,
|
||||
* long-press to right-click).
|
||||
*
|
||||
* @constructor
|
||||
* @param {Element} element The Element to use to provide touch events.
|
||||
*/
|
||||
Guacamole.Mouse.Touchscreen = function(element) {
|
||||
|
||||
/**
|
||||
* Reference to this Guacamole.Mouse.Touchscreen.
|
||||
* @private
|
||||
*/
|
||||
var guac_touchscreen = this;
|
||||
|
||||
/**
|
||||
* The distance a two-finger touch must move per scrollwheel event, in
|
||||
* pixels.
|
||||
*/
|
||||
this.scrollThreshold = 20 * (window.devicePixelRatio || 1);
|
||||
|
||||
/**
|
||||
* The current mouse state. The properties of this state are updated when
|
||||
* mouse events fire. This state object is also passed in as a parameter to
|
||||
* the handler of any mouse events.
|
||||
*
|
||||
* @type Guacamole.Mouse.State
|
||||
*/
|
||||
this.currentState = new Guacamole.Mouse.State(
|
||||
0, 0,
|
||||
false, false, false, false, false
|
||||
);
|
||||
|
||||
/**
|
||||
* Fired whenever a mouse button is effectively pressed. This can happen
|
||||
* as part of a "mousedown" gesture initiated by the user by pressing one
|
||||
* finger over the touchscreen element, as part of a "scroll" gesture
|
||||
* initiated by dragging two fingers up or down, etc.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousedown = null;
|
||||
|
||||
/**
|
||||
* Fired whenever a mouse button is effectively released. This can happen
|
||||
* as part of a "mouseup" gesture initiated by the user by removing the
|
||||
* finger pressed against the touchscreen element, or as part of a "scroll"
|
||||
* gesture initiated by dragging two fingers up or down, etc.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmouseup = null;
|
||||
|
||||
/**
|
||||
* Fired whenever the user moves the mouse by dragging their finger over
|
||||
* the touchscreen element. Note that unlike Guacamole.Mouse.Touchpad,
|
||||
* dragging a finger over the touchscreen element will always cause
|
||||
* the mouse button to be effectively down, as if clicking-and-dragging.
|
||||
*
|
||||
* @event
|
||||
* @param {Guacamole.Mouse.State} state The current mouse state.
|
||||
*/
|
||||
this.onmousemove = null;
|
||||
|
||||
element.addEventListener("touchend", function(e) {
|
||||
|
||||
// Ignore if more than one touch
|
||||
if (e.touches.length + e.changedTouches.length != 1)
|
||||
return;
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// Release button
|
||||
guac_touchscreen.currentState.left = false;
|
||||
|
||||
// Fire release event when the last touch is released, if event defined
|
||||
if (e.touches.length == 0 && guac_touchscreen.onmouseup)
|
||||
guac_touchscreen.onmouseup(guac_touchscreen.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("touchstart", function(e) {
|
||||
|
||||
// Ignore if more than one touch
|
||||
if (e.touches.length != 1)
|
||||
return;
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// Get touch
|
||||
var touch = e.touches[0];
|
||||
|
||||
// Update state
|
||||
guac_touchscreen.currentState.left = true;
|
||||
guac_touchscreen.currentState.fromClientPosition(element, touch.clientX, touch.clientY);
|
||||
|
||||
// Fire press event, if defined
|
||||
if (guac_touchscreen.onmousedown)
|
||||
guac_touchscreen.onmousedown(guac_touchscreen.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
element.addEventListener("touchmove", function(e) {
|
||||
|
||||
// Ignore if more than one touch
|
||||
if (e.touches.length != 1)
|
||||
return;
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
|
||||
// Get touch
|
||||
var touch = e.touches[0];
|
||||
|
||||
// Update state
|
||||
guac_touchscreen.currentState.fromClientPosition(element, touch.clientX, touch.clientY);
|
||||
|
||||
// Fire movement event, if defined
|
||||
if (guac_touchscreen.onmousemove)
|
||||
guac_touchscreen.onmousemove(guac_touchscreen.currentState);
|
||||
|
||||
}, false);
|
||||
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user