CODEWITHSUNDEEP
c#wpfxamlwpf-controls
Vel
Vel

Reputation: 13

WPF- Why keyDown function in my project does not work?

I want to add to this game: https://www.mooict.com/wpf-c-tutorial-create-a-fun-balloon-popping-game-in-visual-studio/

A function ColorKeyIsDown() that is activated when some of keys: Y,R,B,G,O are pressed. So, if any of these keys is pressed, a specific balloon will be removed from the canvas. I made 5 possible tags for every newBalloon that is made, because ballonSkins integer value is from 1-5, every number declares a different background of the newBallon.

In ColorKeyIsDown() I want to identify the balloons by their tags, But it does not work.

How can I identify each different balloon(yellow/red/blue balloon)? Can I identify the balloon by it's background?

*In XAML:

 <Canvas Name="MyCanvas" Focusable="True" MouseLeftButtonDown="popBalloons" Background="White" KeyDown="ColorKeyIsDown">

    <Label Name="scoreLabel" FontSize="24" Content="Score: 0" Foreground="black" FontWeight="ExtraBold" Canvas.Top="527" />

</Canvas>

*In C# Code:

    private void ColorKeyIsDown(object sender, KeyEventArgs e)
    {
        if (gameisactive)
        {
            foreach(var x in MyCanvas.Children.OfType<Rectangle>())
            {
                switch (e.Key)
                {
                    case Key.Y:
                        if ((string)x.Tag == 3.ToString()) { MyCanvas.Children.Remove(x); score++; }
                        break;
                    case Key.R:
                        if ((string)x.Tag == 1.ToString()) { MyCanvas.Children.Remove(x); score++; }
                        break;
                    case Key.B:
                        if ((string)x.Tag == 5.ToString()) { MyCanvas.Children.Remove(x); score++; }
                        break;
                    case Key.G:
                        if ((string)x.Tag == 4.ToString()) { MyCanvas.Children.Remove(x); score++; }
                        break;
                    case Key.O:
                        if ((string)x.Tag == 2.ToString()) { MyCanvas.Children.Remove(x); score++; }
                        break;
                }
            }
        }
    }

*In C#- in gameEngine() function:

          // check which skin number is selected and change them to that number
            switch (balloonSkins)
            {
                case 1:
                    balloonImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/files/balloon1.png"));
                    break;
                case 2:
                    balloonImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/files/balloon2.png"));
                    break;
                case 3:
                    balloonImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/files/balloon3.png"));
                    break;
                case 4:
                    balloonImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/files/balloon4.png"));
                    break;
                case 5:
                    balloonImage.ImageSource = new BitmapImage(new Uri("pack://application:,,,/files/balloon5.png"));
                    break;
            }



            // make a new rectangle called new balloon
            // inside this it has a tag called bloon, height 70 pixels and width 50 pixels and balloon image as the background
            Rectangle newBalloon = new Rectangle
            {
                
                Tag = balloonSkins.ToString(),
                Height = 70,
                Width = 50,
                Fill=balloonImage
                
            };

Upvotes: 0

Views: 272

Answers (1)

Vel
Vel

Reputation: 13

Someone wrote that instead of doing the KeyDown event in Canvas, to do it in the window browser. solution: onkeydown event not working on canvas?

*I changed it, and it works!

Upvotes: 1

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