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How to Change the Size of Tooltip

Posted by Hiren Soni Articles | Windows Controls C# August 16, 2010
In this article you will leanr how to change the Size or Font Type of Text of Tooltip Control.
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Here I will show how to change the size of tooltip:

ToolTip.gif

Here I can see tooltip control text size is bigger than the normal text

Here is code:

public partial class Form1 : Form
    {
        string buttontooltip = "ToolTip Message Here";
        public Form1()
        {
            InitializeComponent();
            toolTip1.SetToolTip(button1, buttontooltip);
            toolTip1.OwnerDraw = true;
            toolTip1.Draw += new DrawToolTipEventHandler(toolTip1_Draw);
            toolTip1.Popup += new PopupEventHandler(toolTip1_Popup);
        }

        void toolTip1_Popup(object sender, PopupEventArgs e)
        {
 
            // on popip set the size of tool tip
           e.ToolTipSize = TextRenderer.MeasureText(buttontooltip, new Font("Arial", 16.0f));
        }

        void toolTip1_Draw(object sender, DrawToolTipEventArgs e)
        {      
                Font f = new Font("Arial", 16.0f);
                e.DrawBackground();
                e.DrawBorder();
                buttontooltip = e.ToolTipText;
                e.Graphics.DrawString(e.ToolTipText, f, Brushes.Black, new PointF(2, 2));    
        }

    }

Draw event raised when tooltip is drawn.

The DrawToolTipEventArgs class contains all the information needed to paint the ToolTip, including the ToolTip text, the Rectangle, and the Graphics object on which the drawing should be done.

With the Draw event,we can also customize the appearance of the ToolTip.

void toolTip1_Draw(object sender, DrawToolTipEventArgs e)
        {      
                Font f = new Font("Arial", 16.0f);
                e.DrawBackground();
                e.DrawBorder();
                e.Graphics.DrawString(e.ToolTipText, f, Brushes.Black, new PointF(2, 2));    
        }
    }


Here if you want to select another font. You can easily do by this way:

Just change statement

Font f = new Font("Arial", 16.0f);

By this one:

Font f = new Font("Verdana", 16.0f);

Then it will print font in verdant.

ToolTip.Popup Event

Occurs before a ToolTip is initially displayed.

In this event. We set the size of popup balloon tooltip text and font size that we have assigned.

e.ToolTipSize = TextRenderer.MeasureText(buttontooltip, new Font("Arial", 16.0f));

This line of code, measure text from tooltip text and from the font.

Hope you understand it!!!

Thank you,
 

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