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Want consistent font size irrespective of zoom (Read 4700 times)

Anshul Senior Member Offline I love YaBB 1G - SP1! Posts: 316 Joined: Apr 3^rd, 2009	Want consistent font size irrespective of zoom Jan 5^th, 2011 at 7:44am	Print Post
	Hi, If diagram's zoom factor is >=100, we want that node's text should not get increase with the diagram zoom factor i.e. node should be zoomed but not its text. Also, if node's text is trimmed at 100 zoom factor than we want if we increase the zoom factor, text size should appear the same and it should display some more text which was previously trimmed. Let know how can we achieve this? We are sending a sample in which we are performing zoom by mouse wheel but text font is increasing with the diagram zoom factor and also, at higher zoom factor we are not able to see trimmed text. Regards, Anshul


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Want consistent font size irrespective of zoom Reply #1 - Jan 5^th, 2011 at 11:07am	Print Post
	This should do the trick: Code private void diagram_ZoomFactorChanged(object sender, EventArgs e) { foreach (DiagramItem item in diagram.Items) item.FontSize *= lastZoom / diagram.ZoomFactor; lastZoom = diagram.ZoomFactor; } private double lastZoom = 100; I hope that helps, Stoyan


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Bala Full Member Offline I love YaBB 1G - SP1! Posts: 156 Joined: Apr 21^st, 2009	Re: Want consistent font size irrespective of zoom Reply #2 - Jan 7^th, 2011 at 10:45am	Print Post
	Hi Stoyan, Thanks for the reply. It has resolved our issue except a small one. We have set TextAllignment to Right. When text is larger enough that it is coming in two line than text is right alligned for both the line, we want text alligment as right for first line line only and for second line text should be left alligned. Please let know your suggestion. Regards, Bala


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Want consistent font size irrespective of zoom Reply #3 - Jan 7^th, 2011 at 1:52pm	Print Post
	Hi, Indeed TextAlignment affects all lines. If you need one line to be right-aligned and the second line left-aligned, you won't be able to use the built-in text rendering but will have to custom-draw the text. Stoyan


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Bala Full Member Offline I love YaBB 1G - SP1! Posts: 156 Joined: Apr 21^st, 2009	Re: Want consistent font size irrespective of zoom Reply #4 - Jan 7^th, 2011 at 2:19pm	Print Post
	How we can do that in our custom shaped node?


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Want consistent font size irrespective of zoom Reply #5 - Jan 8^th, 2011 at 8:59am	Print Post
	Here you can find a simple text renderer that outputs the first line right-aligned and the rest of them left-aligned: http://mindfusion.eu/_samples/Draw2AlignedText.cs You can use the Draw2AlignedText method like this to show the text on the left of a node: Code private void diagram_DrawNode(object sender, DrawNodeEventArgs e) { var node = e.Node; var localRect = new Rect(-150, 0, 150, e.Node.Bounds.Height); Draw2AlignedText(e.Graphics, node.Text, localRect, node); } I hope that helps, Stoyan


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Bala Full Member Offline I love YaBB 1G - SP1! Posts: 156 Joined: Apr 21^st, 2009	Re: Want consistent font size irrespective of zoom Reply #6 - Jan 10^th, 2011 at 7:04am	Print Post
	Hi Stoyan, I am calling node.Repaint(false); from ZoomFactorChange event handler but Diagram_DrawNode() is not getting called. Can you please let know how to fire DrawNode event explicitly? Regards, Bala


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Want consistent font size irrespective of zoom Reply #7 - Jan 10^th, 2011 at 7:12am	Print Post
	Hi, Have you set the node.CustomDraw property? Stoyan


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Bala Full Member Offline I love YaBB 1G - SP1! Posts: 156 Joined: Apr 21^st, 2009	Re: Want consistent font size irrespective of zoom Reply #8 - Jan 10^th, 2011 at 8:47am	Print Post
	No, I have not set node.CustomDraw property.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Want consistent font size irrespective of zoom Reply #9 - Jan 10^th, 2011 at 11:00am	Print Post
	DrawNode is raised only if CustomDraw is different from None. For example set it to Additional to get the standard drawing of ShapeNodes done before raising the event. In that case also set TextBrush = Transparent to stop the default text rendering.


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