Mouse clicks C# XNA

Question

This has been bothering me for quite some time so here we go... I'm making a 2D game using XNA framework and part of the game needs the usage of mouse click funtions in UI. By using these textures as buttons it makes another window to pop up with more functions. Now the problem is when you create a button and use it, it will open another window with more buttons in it. Because these 2 buttons on different windows are at the same location, that one mouse click operates both buttons and makes the action of the last button instantly rather than having to click twice.

The real question is how do I use sprites as buttons rather than checking the position and checking if that possition is clicked?

Thanks in advance for any comments.

It would be extremely helpful to provide the minimum code to reproduce the issue and also explain what you have tried so far to resolve the issue. — user700390, Jun 01 '15 at 22:06
I'm new to this site, so here is part of the code. Pretty much explains everything. if (ms.X > sellRect.X + 85 && ms.X < sellRect.X + sellRect.Width - 20 && ms.Y > sellRect.Y + 25 && ms.Y < sellRect.Y + sellRect.Height - 10) { sellFrameIndex = 2; if (ms.LeftButton == ButtonState.Pressed) { drawSellOptions = false; drawOptions = false; } } — Roliss, Jun 01 '15 at 22:18
I looked google / youtube, everyone uses pretty much the same method. I just want to know how to fix it finally :) — Roliss, Jun 01 '15 at 22:23
Take a look at this question. The answer in their case was to add some additional variables to track the state of the application. You can apply a similar technique. http://stackoverflow.com/questions/15733298/xna-mouse-left-button-gets-executed-more-than-once-in-update — user700390, Jun 01 '15 at 22:27
user700390 i'm not sure if i didn't do it right or something but it doesn't seem to work the way in that link. Did add the old mouse state and updated frame before new mouse state, still all the buttons are pressed with one click. — Roliss, Jun 01 '15 at 23:06
It sounds like you just need to sop walking the control stack once you find the first control that contains the click. — Bradley Uffner, Jun 02 '15 at 15:31

Francis.Beauchamp · Answer 1 · 2015-06-02T15:29:06.207

You could use a state manager in which the proper UI live.

In your case, the first state would have your first buttons, lets call it FirstGameState. When you click on them, the state machine gets you to a another state, lets call it MenuState. You can implement your state manager in a way that allows you to decide who handle events and who doesn't. The only state that handles your click events would be the one flagged to do so. The rest would only draw and update the visual content but handle no user events.

Here is an example for you:

namespace States
{
    class StateManager
    {
        List<GameState> _states = new List<GameState>();
        List<GameState> _statesCopy = new List<GameState>();

        public Game Game                { get; private set; }
        public SpriteBatch SpriteBatch  { get; private set; }

        public StateManager(Game game, SpriteBatch sb)
        {
            Game = game;
            SpriteBatch = sb;
        }

        public void AddState(GameState state)
        {
            _states.Add(state);
        }

        public void RemoveState(GameState state)
        {
            _states.Remove(state);
        }

        public void Update(GameTime gameTime)
        {
            _statesCopy.Clear();
            foreach (GameState state in _states)
                if (state.RequireUpdate)
                    _statesCopy.Add(state);

            foreach (GameState state in _statesCopy)
                if (state.RequireUpdate)
                    state.Update(gameTime);
        }

        public void Draw()
        {
            foreach (GameState state in _states)
                state.Draw();
        }
    }
}

score 0 · Answer 2 · answered Jun 02 '15 at 15:26

I created a basic UI framework that has Windows with Controls on them. Windows are stacked by zOrder as are the controls on each window. There is a ScreenManager class that updates every tick that tracks the mouse. When it sees a button click it walks the window stack from top to bottom looking for the first window that contains the click coordinates. It then calls the OnClick sub of that window instance, which does the same thing for the controls on the window. Each method stops walking the control stack as soon as it finds the first control that contains the click coords.

Each unique window in my game is a subclass of that basic window class that creates child control instances and lays them out in the specific way for it's layout. Controls like buttons raise a clicked event that the window subclass handles to do the logic needed for that button.

Mouse clicks C# XNA

2 Answers2