Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.gui > #3888

Re: fontrendercontext wit

Show all headers | View raw

  To: comp.lang.java.gui
In article <48971a6d$1@news.uni-rostock.de>,
 Stefan Rybacki <noemail@noemail.foobar> wrote:

> Hi,
> 
> I'm trying to write my own tooltip UI. Hence I have to implement a 
> getPreferredSize method. I use the LineBreakMeasurer and TextLayout 
> and its getBounds method.
> But to create a TextLayout or LineBreakMeasurer I need a 
> FontRenderContext which is usually obtained from the graphics 
> context. Which unfortunatelly is not yet available at the time 
> getPreferredSize is called.
> So is there another way to get the tooltips graphics context or at 
> least its FontRenderContext?

Just make a new one

FontRenderContext frc = new FontRenderContext(null, false, false);

which uses the identity transform. Then get the logical size with

Font#getStringBounds(String, FontRenderContext);

Later at draw time, use it to construct a new TextLayout

layout = new TextLayout(String, Font, FontRenderContext);

MOve and fill the boundary with a nice, pale tool tip color, set the 
foreground to something with a high contrast, and call

layout.draw(Graphics2D, Float, Float);

-- 
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews

---
 * Synchronet * The Whitehouse BBS --- whitehouse.hulds.com --- check it out free usenet!
--- Synchronet 3.15a-Win32 NewsLink 1.92
Time Warp of the Future BBS - telnet://time.synchro.net:24

Back to comp.lang.java.gui | Previous | Next | Find similar | Unroll thread

Thread

Re: fontrendercontext wit "John B. Matthews" <john.b..matthews@THRWHITE.remove-dii-this> - 2011-04-27 15:47 +0000

csiph-web