AfflictionNetworks/samskivert
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Would you believe more fiddling with text offsets and rounding and hairy

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business. Also added getLineCount().


git-svn-id: https://samskivert.googlecode.com/svn/trunk@784 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
mdb
2002-06-21 03:05:13 +00:00
parent 49e225ca47
commit 056e17c0bf
1 changed files with 41 additions and 16 deletions
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projects/samskivert/src/java/com/samskivert/swing/Label.java
+41 -16
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@@ -1,5 +1,5 @@
//
// $Id: Label.java,v 1.12 2002/06/20 23:44:32 mdb Exp $
// $Id: Label.java,v 1.13 2002/06/21 03:05:13 mdb Exp $
//
// samskivert library - useful routines for java programs
// Copyright (C) 2002 Michael Bayne
@@ -45,6 +45,7 @@ import javax.swing.SwingConstants;
import com.samskivert.Log;
import com.samskivert.util.StringUtil;
import com.samskivert.util.Tuple;
/**
* The label is a multipurpose text display mechanism that can display
@@ -176,6 +177,14 @@ public class Label implements SwingConstants
_constraints.height = targetHeight;
}
/**
* Returns the number of lines used by this label.
*/
public int getLineCount ()
{
return _layouts.length;
}
/**
* Returns our computed dimensions. Only valid after a call to {@link
* #layout}.
@@ -234,7 +243,7 @@ public class Label implements SwingConstants
_size.setSize(Math.round(bounds.getWidth()),
Math.round(getHeight(layout)));
layouts = new ArrayList();
layouts.add(layout);
layouts.add(new Tuple(layout, bounds));
}
// if we have an outline color, we need to be two pixels bigger in
@@ -245,8 +254,14 @@ public class Label implements SwingConstants
}
// create our layouts array
_layouts = new TextLayout[layouts.size()];
layouts.toArray(_layouts);
int lcount = layouts.size();
_layouts = new TextLayout[lcount];
_lbounds = new Rectangle2D[lcount];
for (int ii = 0; ii < lcount; ii++) {
Tuple tup = (Tuple)layouts.get(ii);
_layouts[ii] = (TextLayout)tup.left;
_lbounds[ii] = (Rectangle2D)tup.right;
}
}
/**
@@ -268,7 +283,7 @@ public class Label implements SwingConstants
Rectangle2D bounds = layout.getBounds();
width = Math.max(width, bounds.getWidth());
height += getHeight(layout);
layouts.add(layout);
layouts.add(new Tuple(layout, bounds));
}
// fill in the computed size; for some reason JDK1.3 on Linux
@@ -305,10 +320,10 @@ public class Label implements SwingConstants
// render our text
for (int i = 0; i < _layouts.length; i++) {
TextLayout layout = _layouts[i];
Rectangle2D lbounds = _lbounds[i];
y += layout.getAscent();
float dx = 0, extra = (float)
(_size.width - layout.getBounds().getWidth());
float dx = 0, extra = (float)(_size.width - lbounds.getWidth());
// if we're outlining, we really have two pixels less space
// than we think we do
if (_outlineColor != null) {
@@ -322,24 +337,31 @@ public class Label implements SwingConstants
case CENTER: dx = extra/2; break;
}
// we need to account both for our justification and for the
// fiddly business that TextLayouts do wherein they don't
// render where you ask them to render, but instead they
// render some number of pixels away, which is reported in the
// "position" part of their bounds
float rx = (float)(x + dx - lbounds.getX());
// render the outline using the hacky, but much nicer than
// using "real" outlines (via TextLayout.getOutline), method
if (_outlineColor != null) {
Color textColor = gfx.getColor();
gfx.setColor(_outlineColor);
layout.draw(gfx, x + dx - 1, y - 1);
layout.draw(gfx, x + dx - 1, y);
layout.draw(gfx, x + dx - 1, y + 1);
layout.draw(gfx, x + dx, y - 1);
layout.draw(gfx, x + dx, y + 1);
layout.draw(gfx, x + dx + 1, y - 1);
layout.draw(gfx, x + dx + 1, y);
layout.draw(gfx, x + dx + 1, y + 1);
layout.draw(gfx, rx - 1, y - 1);
layout.draw(gfx, rx - 1, y);
layout.draw(gfx, rx - 1, y + 1);
layout.draw(gfx, rx, y - 1);
layout.draw(gfx, rx, y + 1);
layout.draw(gfx, rx + 1, y - 1);
layout.draw(gfx, rx + 1, y);
layout.draw(gfx, rx + 1, y + 1);
gfx.setColor(textColor);
}
// and draw the text itself
layout.draw(gfx, x + dx, y);
layout.draw(gfx, rx, y);
y += layout.getDescent() + layout.getLeading();
}
@@ -389,6 +411,9 @@ public class Label implements SwingConstants
/** Formatted text layout instances that contain each line of text. */
protected TextLayout[] _layouts;
/** Formatted text layout instances that contain each line of text. */
protected Rectangle2D[] _lbounds;
/** The color in which to outline the text when rendering or null if
* the text should not be outlined. */
protected Color _outlineColor = null;