(ev)
| 1381 | } |
| 1382 | |
| 1383 | _handleWheel(ev) { |
| 1384 | if (this._rfbConnectionState !== 'connected') { return; } |
| 1385 | if (this._viewOnly) { return; } // View only, skip mouse events |
| 1386 | |
| 1387 | ev.stopPropagation(); |
| 1388 | ev.preventDefault(); |
| 1389 | |
| 1390 | let pos = clientToElement(ev.clientX, ev.clientY, |
| 1391 | this._canvas); |
| 1392 | |
| 1393 | let bmask = RFB._convertButtonMask(ev.buttons); |
| 1394 | let dX = ev.deltaX; |
| 1395 | let dY = ev.deltaY; |
| 1396 | |
| 1397 | // Pixel units unless it's non-zero. |
| 1398 | // Note that if deltamode is line or page won't matter since we aren't |
| 1399 | // sending the mouse wheel delta to the server anyway. |
| 1400 | // The difference between pixel and line can be important however since |
| 1401 | // we have a threshold that can be smaller than the line height. |
| 1402 | if (ev.deltaMode !== 0) { |
| 1403 | dX *= WHEEL_LINE_HEIGHT; |
| 1404 | dY *= WHEEL_LINE_HEIGHT; |
| 1405 | } |
| 1406 | |
| 1407 | // Mouse wheel events are sent in steps over VNC. This means that the VNC |
| 1408 | // protocol can't handle a wheel event with specific distance or speed. |
| 1409 | // Therefor, if we get a lot of small mouse wheel events we combine them. |
| 1410 | this._accumulatedWheelDeltaX += dX; |
| 1411 | this._accumulatedWheelDeltaY += dY; |
| 1412 | |
| 1413 | |
| 1414 | // Generate a mouse wheel step event when the accumulated delta |
| 1415 | // for one of the axes is large enough. |
| 1416 | if (Math.abs(this._accumulatedWheelDeltaX) >= WHEEL_STEP) { |
| 1417 | if (this._accumulatedWheelDeltaX < 0) { |
| 1418 | this._handleMouseButton(pos.x, pos.y, bmask | 1 << 5); |
| 1419 | this._handleMouseButton(pos.x, pos.y, bmask); |
| 1420 | } else if (this._accumulatedWheelDeltaX > 0) { |
| 1421 | this._handleMouseButton(pos.x, pos.y, bmask | 1 << 6); |
| 1422 | this._handleMouseButton(pos.x, pos.y, bmask); |
| 1423 | } |
| 1424 | |
| 1425 | this._accumulatedWheelDeltaX = 0; |
| 1426 | } |
| 1427 | if (Math.abs(this._accumulatedWheelDeltaY) >= WHEEL_STEP) { |
| 1428 | if (this._accumulatedWheelDeltaY < 0) { |
| 1429 | this._handleMouseButton(pos.x, pos.y, bmask | 1 << 3); |
| 1430 | this._handleMouseButton(pos.x, pos.y, bmask); |
| 1431 | } else if (this._accumulatedWheelDeltaY > 0) { |
| 1432 | this._handleMouseButton(pos.x, pos.y, bmask | 1 << 4); |
| 1433 | this._handleMouseButton(pos.x, pos.y, bmask); |
| 1434 | } |
| 1435 | |
| 1436 | this._accumulatedWheelDeltaY = 0; |
| 1437 | } |
| 1438 | } |
| 1439 | |
| 1440 | _fakeMouseMove(ev, elementX, elementY) { |
nothing calls this directly
no test coverage detected