How to prevent two labels created in run-time from intersecting with each other? (C# WPF)












1















I have a canvas, which, upon a click on the left button of the mouse, has a label created on it in the clicking point. This is the xaml code:



public partial class MainWindow : Window
{
int num = 1;
List <Label> countries = new List<Label>();
public MainWindow()
{
InitializeComponent();
}

private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var point = Mouse.GetPosition(Canvas);
Label label = new Label() { Width = 100, Height = 100 };
Canvas.Children.Add(label);
Canvas.SetLeft(label, point.X);
Canvas.SetTop(label, point.Y);
label.Focus();
num++;
countries.Add(label);
}
}


I would like to make it so two different labels would not be able to intersect with each other. The idea is that if the user tries to create a label in a location which would cause it to intersect with another existing label, a message box would pop and tell him to choose another location.



Unfortunately I did not succeed in implementing this. If anyone could help, I would be very glad.
Help will be much appreciated :)










share|improve this question



























    1















    I have a canvas, which, upon a click on the left button of the mouse, has a label created on it in the clicking point. This is the xaml code:



    public partial class MainWindow : Window
    {
    int num = 1;
    List <Label> countries = new List<Label>();
    public MainWindow()
    {
    InitializeComponent();
    }

    private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
    var point = Mouse.GetPosition(Canvas);
    Label label = new Label() { Width = 100, Height = 100 };
    Canvas.Children.Add(label);
    Canvas.SetLeft(label, point.X);
    Canvas.SetTop(label, point.Y);
    label.Focus();
    num++;
    countries.Add(label);
    }
    }


    I would like to make it so two different labels would not be able to intersect with each other. The idea is that if the user tries to create a label in a location which would cause it to intersect with another existing label, a message box would pop and tell him to choose another location.



    Unfortunately I did not succeed in implementing this. If anyone could help, I would be very glad.
    Help will be much appreciated :)










    share|improve this question

























      1












      1








      1








      I have a canvas, which, upon a click on the left button of the mouse, has a label created on it in the clicking point. This is the xaml code:



      public partial class MainWindow : Window
      {
      int num = 1;
      List <Label> countries = new List<Label>();
      public MainWindow()
      {
      InitializeComponent();
      }

      private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
      {
      var point = Mouse.GetPosition(Canvas);
      Label label = new Label() { Width = 100, Height = 100 };
      Canvas.Children.Add(label);
      Canvas.SetLeft(label, point.X);
      Canvas.SetTop(label, point.Y);
      label.Focus();
      num++;
      countries.Add(label);
      }
      }


      I would like to make it so two different labels would not be able to intersect with each other. The idea is that if the user tries to create a label in a location which would cause it to intersect with another existing label, a message box would pop and tell him to choose another location.



      Unfortunately I did not succeed in implementing this. If anyone could help, I would be very glad.
      Help will be much appreciated :)










      share|improve this question














      I have a canvas, which, upon a click on the left button of the mouse, has a label created on it in the clicking point. This is the xaml code:



      public partial class MainWindow : Window
      {
      int num = 1;
      List <Label> countries = new List<Label>();
      public MainWindow()
      {
      InitializeComponent();
      }

      private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
      {
      var point = Mouse.GetPosition(Canvas);
      Label label = new Label() { Width = 100, Height = 100 };
      Canvas.Children.Add(label);
      Canvas.SetLeft(label, point.X);
      Canvas.SetTop(label, point.Y);
      label.Focus();
      num++;
      countries.Add(label);
      }
      }


      I would like to make it so two different labels would not be able to intersect with each other. The idea is that if the user tries to create a label in a location which would cause it to intersect with another existing label, a message box would pop and tell him to choose another location.



      Unfortunately I did not succeed in implementing this. If anyone could help, I would be very glad.
      Help will be much appreciated :)







      c# wpf xaml user-interface label






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      share|improve this question










      asked Nov 12 '18 at 15:03









      BlablaBlabla

      334




      334
























          1 Answer
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          Try this:



           private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
          {
          var point = Mouse.GetPosition(canvas);
          Rect newrect = new Rect(point.X, point.Y, 100, 100);
          Boolean isIntersects = false;
          foreach (Control control in canvas.Children)
          {
          if (control is Label)
          {
          Rect oldrect = new Rect(Canvas.GetLeft(control), Canvas.GetTop(control), control.Width, control.Height);
          if (newrect.IntersectsWith(oldrect))
          {
          MessageBox.Show("Oops. Intersecting...");
          isIntersects = true;
          break;
          }
          }
          }
          if (isIntersects == false)
          {
          Label label = new Label() { Width = 100, Height = 100 };
          label.Content = "This is a label:)";
          label.Background = new SolidColorBrush(Colors.Yellow);
          canvas.Children.Add(label);
          Canvas.SetLeft(label, point.X);
          Canvas.SetTop(label, point.Y);
          }
          }





          share|improve this answer























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            active

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            0














            Try this:



             private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
            {
            var point = Mouse.GetPosition(canvas);
            Rect newrect = new Rect(point.X, point.Y, 100, 100);
            Boolean isIntersects = false;
            foreach (Control control in canvas.Children)
            {
            if (control is Label)
            {
            Rect oldrect = new Rect(Canvas.GetLeft(control), Canvas.GetTop(control), control.Width, control.Height);
            if (newrect.IntersectsWith(oldrect))
            {
            MessageBox.Show("Oops. Intersecting...");
            isIntersects = true;
            break;
            }
            }
            }
            if (isIntersects == false)
            {
            Label label = new Label() { Width = 100, Height = 100 };
            label.Content = "This is a label:)";
            label.Background = new SolidColorBrush(Colors.Yellow);
            canvas.Children.Add(label);
            Canvas.SetLeft(label, point.X);
            Canvas.SetTop(label, point.Y);
            }
            }





            share|improve this answer




























              0














              Try this:



               private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
              {
              var point = Mouse.GetPosition(canvas);
              Rect newrect = new Rect(point.X, point.Y, 100, 100);
              Boolean isIntersects = false;
              foreach (Control control in canvas.Children)
              {
              if (control is Label)
              {
              Rect oldrect = new Rect(Canvas.GetLeft(control), Canvas.GetTop(control), control.Width, control.Height);
              if (newrect.IntersectsWith(oldrect))
              {
              MessageBox.Show("Oops. Intersecting...");
              isIntersects = true;
              break;
              }
              }
              }
              if (isIntersects == false)
              {
              Label label = new Label() { Width = 100, Height = 100 };
              label.Content = "This is a label:)";
              label.Background = new SolidColorBrush(Colors.Yellow);
              canvas.Children.Add(label);
              Canvas.SetLeft(label, point.X);
              Canvas.SetTop(label, point.Y);
              }
              }





              share|improve this answer


























                0












                0








                0







                Try this:



                 private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
                {
                var point = Mouse.GetPosition(canvas);
                Rect newrect = new Rect(point.X, point.Y, 100, 100);
                Boolean isIntersects = false;
                foreach (Control control in canvas.Children)
                {
                if (control is Label)
                {
                Rect oldrect = new Rect(Canvas.GetLeft(control), Canvas.GetTop(control), control.Width, control.Height);
                if (newrect.IntersectsWith(oldrect))
                {
                MessageBox.Show("Oops. Intersecting...");
                isIntersects = true;
                break;
                }
                }
                }
                if (isIntersects == false)
                {
                Label label = new Label() { Width = 100, Height = 100 };
                label.Content = "This is a label:)";
                label.Background = new SolidColorBrush(Colors.Yellow);
                canvas.Children.Add(label);
                Canvas.SetLeft(label, point.X);
                Canvas.SetTop(label, point.Y);
                }
                }





                share|improve this answer













                Try this:



                 private void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
                {
                var point = Mouse.GetPosition(canvas);
                Rect newrect = new Rect(point.X, point.Y, 100, 100);
                Boolean isIntersects = false;
                foreach (Control control in canvas.Children)
                {
                if (control is Label)
                {
                Rect oldrect = new Rect(Canvas.GetLeft(control), Canvas.GetTop(control), control.Width, control.Height);
                if (newrect.IntersectsWith(oldrect))
                {
                MessageBox.Show("Oops. Intersecting...");
                isIntersects = true;
                break;
                }
                }
                }
                if (isIntersects == false)
                {
                Label label = new Label() { Width = 100, Height = 100 };
                label.Content = "This is a label:)";
                label.Background = new SolidColorBrush(Colors.Yellow);
                canvas.Children.Add(label);
                Canvas.SetLeft(label, point.X);
                Canvas.SetTop(label, point.Y);
                }
                }






                share|improve this answer












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                share|improve this answer










                answered Nov 13 '18 at 22:38









                HYAHYA

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