Questions on UI for WinForms Forum

3 answers

176 views

[Solved] TPF, simple control and layout implementation

Hi,
I'm getting into TPF based control development and I'm finding a lot of difficulties to understand the behind logic maybe because there is not enough documentation and examples on that.

I'm trying to make a control that arrange in a stacklayout many radlabelelement as the Rows property value of my control; the height of any child element should be control.Size.Height/control.Rows, so I got my child to have same height.

This is the way I implement it, could you please help me on that?

MyControl:

    
                public class MyControl : RadControl 
        
                { 
        
                    MyElementPanel elementPanel; 
        
                    public MyControl() 
        
                    { 
        
                        this.UseNewLayoutSystem = true; 
        
                        this.AutoSize = true; 
        
                    } 
        
                    protected override void CreateChildItems(RadElement parent) 
        
                    { 
        
                        elementPanel = new MyElementPanel(); 
        
                        this.RootElement.Children.Add(elementPanel); 
        
                        base.CreateChildItems(parent); 
        
                    } 
        
                    public int Rows 
        
                    { 
        
                        get 
        
                        { 
        
                            return this.elementPanel.Rows; 
        
                        } 
        
                        set 
        
                        { 
        
                            this.elementPanel.Rows = value; 
        
                        } 
        
                    } 
        
                }

MyElement:

    
                public class MyElementPanel : RadItem 
        
                { 
        
                    StackLayoutPanel layout; 
        
                    public static RadProperty RowsProperty = RadProperty.Register( 
        
                        "Rows", 
        
                        typeof(int), 
        
                        typeof(MyElementPanel), 
        
                        new RadElementPropertyMetadata(2, ElementPropertyOptions.AffectsLayout)); 
        
                    public int Rows 
        
                    { 
        
                        get 
        
                        { 
        
                            return (int)this.GetValue(RowsProperty); 
        
                        } 
        
                        set 
        
                        { 
        
                            this.SetValue(RowsProperty, value); 
        
                        } 
        
                    } 
        
                    protected override void CreateChildElements() 
        
                    { 
        
                        var border = new BorderPrimitive(); 
        
                        Children.Add(border); 
        
                        var background = new FillPrimitive(); 
        
                        Children.Add(background); 
        
                        layout = new StackLayoutPanel(); 
        
                        layout.Orientation = System.Windows.Forms.Orientation.Vertical; 
        
                        this.Children.Add(layout); 
        
                        var rows = this.Rows; 
        
                        int rowHeight = (int)this.Size.Height / rows; 
        
                        for (int i = 0; i < rows; i++) 
        
                        { 
        
                            var child = new RadLabelElement(); 
        
                            child.Text = (i + 1).ToString(); 
        
                            child.Margin = new System.Windows.Forms.Padding(1); 
        
                            child.Children[2].AutoSize = false; 
        
                            child.Children[2].Size = new Size(20, rowHeight); 
        
                            child.BorderVisible = true; 
        
                            layout.Children.Add(child); 
        
                        } 
        
                        base.CreateChildElements(); 
        
                    } 
        
                    protected override void OnPropertyChanged(RadPropertyChangedEventArgs e) 
        
                    { 
        
                        if (e.Property == StorageRackElement.RowsProperty) 
        
                        { 
        
                            var rows = (int)e.NewValue; 
        
                            int rowHeight = (int)this.Size.Height / rows; 
        
                            layout.Children.Clear(); 
        
                            for (int i = 0; i < rows; i++) 
        
                            { 
        
                                var child = new RadLabelElement(); 
        
                                child.Text = (i + 1).ToString(); 
        
                                child.Margin = new System.Windows.Forms.Padding(1); 
        
                                child.Children[2].AutoSize = false; 
        
                                child.Children[2].Size = new Size(20, rowHeight); 
        
                                child.BorderVisible = true; 
        
                                layout.Children.Add(child); 
        
                            } 
        
                        } 
        
                        if (e.Property == StorageRackElement.BoundsProperty) 
        
                        { 
        
                            int rowHeight = (int)this.Size.Height / this.Rows; 
        
                            foreach(var child in layout.Children) 
        
                                child.Children[2].Size = new Size(20, rowHeight); 
        
                        } 
        
                        base.OnPropertyChanged(e); 
        
                    } 
        
                }

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