No verticle boundation for the overlay

[GauravAppdidGithub]

positionGravity: PositionGravity.auto,
alignment: OverlayAlignment.centerLeft,

I have given positionGravity & alignment as mentioned therefore the overlay is sticking either on the left or right of the screen but it is possible to drag it away from the viewport if dragged enough vertically.

How to restrict this behavior or give overlay a verticle bound?

[joanneast]

I have same question too.

More, I found when I set 'alignment: OverlayAlignment.center' and 'positionGravity: PositionGravity.auto', the overlay will sticking on center or out-of-screen.

Could this situation been solved by anyway?

[joanneast]

Hi X-SLAYER, recently I've been trying to solve these issues. Currently, I've made some adjustments that seem to work, but my experience in coding isn't extensive. Even though I've done my best, these might just be temporary solutions. Hope they can be of some help, I also want to hear feedback on this work:

public TrayAnimationTimerTask() {
            super();

            int left = 0;
            int right = szWindow.x - flutterView.getWidth();
            int top = 0 + mStatusBarHeight;
            int bottom = szWindow.y - mNavigationBarHeight - flutterView.getHeight() / 4;

            int regulateOffsetX = (szWindow.x - flutterView.getWidth()) / 2;
            int regulateOffsetY = szWindow.y / 2;

            // Solve the offset issue with including Gravity.CENTER setting
            if (WindowSetup.gravity == (Gravity.TOP)
                    || WindowSetup.gravity == (Gravity.CENTER)
                    || WindowSetup.gravity == (Gravity.BOTTOM)) {
                left = left - regulateOffsetX;
                right = right - regulateOffsetX;
            }
            if (WindowSetup.gravity == (Gravity.LEFT | Gravity.CENTER)
                    || WindowSetup.gravity == (Gravity.CENTER)
                    || WindowSetup.gravity == (Gravity.RIGHT | Gravity.CENTER)) {
                top = top - regulateOffsetY;
                bottom = bottom - regulateOffsetY;
            }

            // Solve the slight offset issue with including Gravity.BOTTOM setting
            if ((WindowSetup.gravity & Gravity.BOTTOM) == Gravity.BOTTOM) {
                top = top - flutterView.getHeight() / 2;
                bottom = bottom - flutterView.getHeight() / 2;
            }

            switch (WindowSetup.positionGravity) {
                case "auto":
                    mDestX = (params.x + (flutterView.getWidth() / 2)) <= right / 2 ? left : right;
                    break;
                case "left":
                    mDestX = left;
                    break;
                case "right":
                    mDestX = right;
                    break;
                default:
                    mDestX = params.x;
                    mDestY = params.y;
                    break;
            }
            mDestY = lastYPosition;

            // Solve the problem of floating window being able to move out of the viewport
            mDestX = Math.max(left, Math.min(mDestX, right));
            mDestY = Math.max(top, Math.min(mDestY, bottom));
            return;
        }

Note: Some algorithms are adjusted based on my personal preference for visual effects. Feel free to modify them as you see fit.

[joanneast]

Additionally, I'd like to ask about the principle behind params.y = -statusBarHeightPx() in onStartCommand(). Is it more accurate to use a positive number, or am I overlooking some considerations?

WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                WindowSetup.width == -1999 ? -1 : WindowSetup.width,
                WindowSetup.height != -1999 ? WindowSetup.height : screenHeight(),
                0,
                -statusBarHeightPx(),
                Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY : WindowManager.LayoutParams.TYPE_PHONE,
                WindowSetup.flag | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
                        | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
                        | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR
                        | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                PixelFormat.TRANSLUCENT
        );