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!7

srecord MouseEvt(bool mouseDown, DoublePt p) {
  long time = sysNow();
}
  
module MiniVNC > DynImageSurface {
  bool enabled, usePossiblyBrokenVersion = true;
  S computerID;
  int width = 256;
  double videoInterval = 2.0, mouseInterval = 0.1;
  
  transient int discardEventsAfter = 10000;
  transient int dummyWidth = 100000;
  transient DoublePt mousePosition;
  transient bool sentMouseButton;
  transient L<MouseEvt> events = syncList();
  transient DoublePt sentMousePosition;

  S switchableFields() { ret "usePossiblyBrokenVersion videoInterval"; }
  
  start {
    doEvery(videoInterval, r grab);
    doEvery(mouseInterval, r moveMouse);
  }
  
  visualize {
    JComponent c = super.visualize();
    enableDoubleBuffering();
    imageSurfaceOnMouseMoveOrDrag_double(imageSurface, voidfunc(DoublePt p) { mousePosition = p });
    disableImageSurfaceSelector(imageSurface);
    addMouseListener(imageSurface, new MouseAdapter {
      public void mousePressed(MouseEvent evt) {
        if (!actuallyEnabled() || evt.getButton() != MouseEvent.BUTTON1) return;
        events.add(MouseEvt(true, imageSurface_doublePtFromEvent(imageSurface, evt)));
      }

      public void mouseReleased(MouseEvent evt) {
        if (!actuallyEnabled() || evt.getButton() != MouseEvent.BUTTON1) return;
        events.add(MouseEvt(false, imageSurface_doublePtFromEvent(imageSurface, evt)));
      }
    });

    ret northAndCenterWithMargins(vstackWithSpacing(
      centerAndEastWithMargins(
        withLabel("Computer to control:", dm_onlineComputerSelectorComboBox(dm_fieldLiveValue('computerID))), dm_fieldCheckBox('enabled)),
        jRightAlignedLine(jLabel("Resize to width (pixels):"), jMinWidth(100, jLiveValueIntTextField(dm_fieldLiveValue('width))))),
      c);
  }
  
  bool actuallyEnabled() {
    ret enabled && possibleComputerID(computerID) && dm_isVisible();
  }
  
  void grab enter {
    if (!actuallyEnabled()) ret;
    time "Get Screenshot" {
      setImage(dm_scaledDownScreenshotFromOtherMachine(computerID, width, +usePossiblyBrokenVersion));
    }
  }
  
  void moveMouse enter {
    if (!actuallyEnabled()) {
      sentMousePosition = null; sentMouseButton = false; ret;
    }
    LinkedList<MouseEvt> events = cloneAndClearAsLinkedList(this.events);
    
    final double scale = doubleRatio(dummyWidth, width);
    
    // drop old events (if network was down)
    bool sendMouseUp = false;
    while (nempty(events) && elapsedMS(first(events).time) >= discardEventsAfter) {
      if (!first(events).mouseDown) set sendMouseUp; // don't drop that
      popFirst(events);
    }
    if (sendMouseUp)
      dm_evalOnOtherMachine(computerID, "robot_leftMouseUp()");
      
    // send mouse click/release events      
    for (MouseEvt e : events) {
      dm_evalOnOtherMachine(computerID,
        "robot_leftMouseButtonPressOrRelease_scaled(" + e.mouseDown + ", " + scaleInt(e.p.x, scale) + ", " + scaleInt(e.p.y, scale) + ", " + dummyWidth + ")");
      sentMousePosition = e.p;
      sentMouseButton = e.mouseDown;
    }
      
    // send mouse position
    Pt p = mousePosition;
    if (neq(p, sentMousePosition)) {
      sentMousePosition = p;
      if (p != null) {
        time "Move Mouse On Other Machine" {
          dm_evalOnOtherMachine(computerID, "dm_moveMouseImmediate_direct_scaled(" + scaleInt(p.x, scale) + ", " + scaleInt(p.y, scale) + ", " + dummyWidth + ")");
        }
      }
    }
  }
}