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Add "touchpad mode" with pinch-zoom for mobile view. #1835

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62 changes: 62 additions & 0 deletions app/images/touchpad.svg
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Could we make this icon a bit smaller? It seems larger than the other toolbar icons:

trackpad button size

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11 changes: 10 additions & 1 deletion app/styles/base.css
Original file line number Diff line number Diff line change
Expand Up @@ -345,7 +345,10 @@ html {
padding: 0 10px;
}

#noVNC_control_bar > .noVNC_scroll > * {
/* Do not apply margin to #noVNC_mobilebuttons div. There is now
more than one button inside it, so we'll apply margins directly
to the buttons in another rule. */
#noVNC_control_bar > .noVNC_scroll > *:not(#noVNC_mobile_buttons) {
display: block;
margin: 10px auto;
}
Expand Down Expand Up @@ -553,6 +556,12 @@ html {
:root:not(.noVNC_connected) #noVNC_mobile_buttons {
display: none;
}

#noVNC_mobile_buttons > .noVNC_button {
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If you make this selector more specific, you can avoid the *:not(#noVNC_mobile_buttons) above.

I think #noVNC_control_bar > .noVNC_scroll > #noVNC_mobile_buttons > .noVNC_button { should work.

display: block;
margin: 10px auto;
}

@media not all and (any-pointer: coarse) {
/* FIXME: The button for the virtual keyboard is the only button in this
group of "mobile buttons". It is bad to assume that no touch
Expand Down
85 changes: 75 additions & 10 deletions app/ui.js
Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,7 @@ const UI = {
});

// Adapt the interface for touch screen devices
if (isTouchDevice) {
if (isTouchDevice()) {
// Remove the address bar
setTimeout(() => window.scrollTo(0, 1), 100);
}
Expand Down Expand Up @@ -232,6 +232,9 @@ const UI = {
document.getElementById("noVNC_view_drag_button")
.addEventListener('click', UI.toggleViewDrag);

document.getElementById("noVNC_touchpad_button")
.addEventListener('click', UI.toggleTouchpadMode);

document.getElementById("noVNC_control_bar_handle")
.addEventListener('mousedown', UI.controlbarHandleMouseDown);
document.getElementById("noVNC_control_bar_handle")
Expand Down Expand Up @@ -461,6 +464,12 @@ const UI = {
.classList.remove('noVNC_open');
},

/**
* @param {string} text
* @param { "normal" | "info" | "warn" | "warning" | "error" } statusType
* @param {number} time
* @returns
*/
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This seems a bit out of place, we don't have these types of docstrings anywhere else.

showStatus(text, statusType, time) {
const statusElem = document.getElementById('noVNC_status');

Expand Down Expand Up @@ -1061,8 +1070,10 @@ const UI = {
UI.rfb.qualityLevel = parseInt(UI.getSetting('quality'));
UI.rfb.compressionLevel = parseInt(UI.getSetting('compression'));
UI.rfb.showDotCursor = UI.getSetting('show_dot');
UI.rfb.touchpadMode = WebUtil.readSetting('touchpad_mode', 'false') === 'true';
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Doesn't UI.getSetting() work for you?

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Should we default to touchpad_mode on very small screens?


UI.updateViewOnly(); // requires UI.rfb
UI.updateTouchpadMode();
},

disconnect() {
Expand Down Expand Up @@ -1116,6 +1127,12 @@ const UI = {

// Do this last because it can only be used on rendered elements
UI.rfb.focus();

// In touchpad mode, we want the cursor centered in the
// viewport at the start so we can see it.
if (UI.rfb.touchpadMode) {
UI.rfb.centerCursorInViewport();
}
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How come you went this route instead of centering the viewport on where the cursor already is?

},

disconnectFinished(e) {
Expand Down Expand Up @@ -1345,7 +1362,7 @@ const UI = {
// Can't be clipping if viewport is scaled to fit
UI.forceSetting('view_clip', false);
UI.rfb.clipViewport = false;
} else if (brokenScrollbars) {
} else if (brokenScrollbars || UI.rfb.touchpadMode) {
UI.forceSetting('view_clip', true);
UI.rfb.clipViewport = true;
} else {
Expand All @@ -1369,13 +1386,18 @@ const UI = {

UI.rfb.dragViewport = !UI.rfb.dragViewport;
UI.updateViewDrag();
UI.updateTouchpadMode();
},

updateViewDrag() {
if (!UI.connected) return;

const viewDragButton = document.getElementById('noVNC_view_drag_button');

if (UI.rfb.dragViewport) {
UI.rfb.touchpadMode = false;
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Good that you remembered adding this!

}

if ((!UI.rfb.clipViewport || !UI.rfb.clippingViewport) &&
UI.rfb.dragViewport) {
// We are no longer clipping the viewport. Make sure
Expand Down Expand Up @@ -1429,7 +1451,7 @@ const UI = {
* ------v------*/

showVirtualKeyboard() {
if (!isTouchDevice) return;
if (!isTouchDevice()) return;

const input = document.getElementById('noVNC_keyboardinput');

Expand All @@ -1447,7 +1469,7 @@ const UI = {
},

hideVirtualKeyboard() {
if (!isTouchDevice) return;
if (!isTouchDevice()) return;

const input = document.getElementById('noVNC_keyboardinput');

Expand Down Expand Up @@ -1586,11 +1608,52 @@ const UI = {
}
},

/* ------^-------
* /KEYBOARD
* ==============
* EXTRA KEYS
* ------v------*/
/* ------^-------
* /KEYBOARD
* ==============
* TOUCHPAD
* ------v------*/

toggleTouchpadMode() {
if (!UI.rfb) return;

UI.rfb.touchpadMode = !UI.rfb.touchpadMode;
WebUtil.writeSetting('touchpad_mode', UI.rfb.touchpadMode);
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UI.saveSetting()?

UI.updateTouchpadMode();
UI.updateViewDrag();
},

updateTouchpadMode() {
if (UI.rfb.touchpadMode) {
UI.rfb.dragViewport = false;

UI.forceSetting('resize', 'off');
UI.forceSetting('view_clip', true);
UI.forceSetting('show_dot', true);

UI.rfb.clipViewport = true;
UI.rfb.scaleViewport = false;
UI.rfb.resizeSession = false;
UI.rfb.showDotCursor = true;
} else {
UI.enableSetting('resize');
UI.enableSetting('view_clip');
UI.enableSetting('show_dot');
}

const touchpadButton = document.getElementById('noVNC_touchpad_button');
if (UI.rfb.touchpadMode) {
touchpadButton.classList.add("noVNC_selected");
} else {
touchpadButton.classList.remove("noVNC_selected");
}
},

/* ------^-------
* /TOUCHPAD
* ==============
* EXTRA KEYS
* ------v------*/

openExtraKeys() {
UI.closeAllPanels();
Expand Down Expand Up @@ -1704,12 +1767,14 @@ const UI = {
.classList.add('noVNC_hidden');
document.getElementById('noVNC_clipboard_button')
.classList.add('noVNC_hidden');
document.getElementById('noVNC_clipboard_button')
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This should say noVNC_touchpad_button I believe.

.classList.add('noVNC_hidden');
} else {
document.getElementById('noVNC_keyboard_button')
.classList.remove('noVNC_hidden');
document.getElementById('noVNC_toggle_extra_keys_button')
.classList.remove('noVNC_hidden');
document.getElementById('noVNC_clipboard_button')
document.getElementById('noVNC_touchpad_button')
.classList.remove('noVNC_hidden');
}
},
Expand Down
34 changes: 34 additions & 0 deletions core/display.js
Original file line number Diff line number Diff line change
Expand Up @@ -87,8 +87,38 @@ export default class Display {
return this._fbHeight;
}

get viewportLocation() {
return this._viewportLoc;
}

// ===== PUBLIC METHODS =====

/**
* Attempt to move the viewport by the specified amounts
* and returns the amount of actual position change.
* @param {number} moveByX
* @param {number} moveByY
* @return {{ x: number, y: number }}
*/
viewportTryMoveBy(moveByX, moveByY) {
if (moveByX === 0 && moveByY === 0) {
return {
x: 0,
y: 0
};
}

const vpX = this._viewportLoc.x;
const vpY = this._viewportLoc.y;

this.viewportChangePos(moveByX, moveByY);

return {
x: this._viewportLoc.x - vpX,
y: this._viewportLoc.y - vpY
};
}

viewportChangePos(deltaX, deltaY) {
const vp = this._viewportLoc;
deltaX = Math.floor(deltaX);
Expand Down Expand Up @@ -433,6 +463,10 @@ export default class Display {
this._rescale(scaleRatio);
}

rescale(factor) {
this._rescale(factor);
}

// ===== PRIVATE METHODS =====

_rescale(factor) {
Expand Down
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