Beispiel #1
0
            bool OnTouchOrHoverEvent(MotionEvent e, bool isTouch)
            {
                MotionEventButtonState buttonState    = e.ButtonState;
                MotionEventButtonState pressedButtons = buttonState & ~mOldButtonState;

                mOldButtonState = buttonState;

                if ((pressedButtons & MotionEventButtonState.Secondary) != 0)
                {
                    // Advance color when the right mouse button or first stylus button
                    // is pressed.
                    AdvanceColor();
                }

                PaintMode mode;

                if ((buttonState & MotionEventButtonState.Tertiary) != 0)
                {
                    // Splat paint when the middle mouse button or second stylus button is pressed.
                    mode = PaintMode.Splat;
                }
                else if (isTouch || (buttonState & MotionEventButtonState.Primary) != 0)
                {
                    // Draw paint when touching or if the primary button is pressed.
                    mode = PaintMode.Draw;
                }
                else
                {
                    // Otherwise, do not paint anything.
                    return(false);
                }

                MotionEventActions action = e.ActionMasked;

                if (action == MotionEventActions.Down || action == MotionEventActions.Move ||
                    action == MotionEventActions.HoverMove)
                {
                    int N = e.HistorySize;
                    int P = e.PointerCount;
                    for (int i = 0; i < N; i++)
                    {
                        for (int j = 0; j < P; j++)
                        {
                            Paint(GetPaintModeForTool(e.GetToolType(j), mode),
                                  e.GetHistoricalX(j, i),
                                  e.GetHistoricalY(j, i),
                                  e.GetHistoricalPressure(j, i),
                                  e.GetHistoricalTouchMajor(j, i),
                                  e.GetHistoricalTouchMinor(j, i),
                                  e.GetHistoricalOrientation(j, i),
                                  e.GetHistoricalAxisValue(Axis.Distance, j, i),
                                  e.GetHistoricalAxisValue(Axis.Tilt, j, i));
                        }
                    }
                    for (int j = 0; j < P; j++)
                    {
                        Paint(GetPaintModeForTool(e.GetToolType(j), mode),
                              e.GetX(j),
                              e.GetY(j),
                              e.GetPressure(j),
                              e.GetTouchMajor(j),
                              e.GetTouchMinor(j),
                              e.GetOrientation(j),
                              e.GetAxisValue(Axis.Distance, j),
                              e.GetAxisValue(Axis.Tilt, j));
                    }
                    mCurX = e.GetX();
                    mCurY = e.GetY();
                }
                return(true);
            }