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8044301: BasicTreeUI: "revisit when Java2D is ready"

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Reviewed-by: alexsch, pchelko
This commit is contained in:
Andrei Eremeev 2014-07-17 15:30:13 +04:00
parent faa69ed489
commit 7bd14b7bc3
1 changed files with 40 additions and 15 deletions
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55
jdk/src/share/classes/javax/swing/plaf/basic/BasicTreeUI.java
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@ -1863,32 +1863,57 @@ public class BasicTreeUI extends TreeUI
y - icon.getIconHeight() / 2);
}
// This method is slow -- revisit when Java2D is ready.
// assumes x1 <= x2
protected void drawDashedHorizontalLine(Graphics g, int y, int x1, int x2){
/**
* Draws a horizontal dashed line. It is assumed {@code x1} &lt;= {@code x2}.
* If {@code x1} is greater than {@code x2}, the method draws nothing.
*
* @param g an instance of {@code Graphics}
* @param y an Y coordinate
* @param x1 an X1 coordinate
* @param x2 an X2 coordinate
*/
protected void drawDashedHorizontalLine(Graphics g, int y, int x1, int x2) {
// Drawing only even coordinates helps join line segments so they
// appear as one line. This can be defeated by translating the
// Graphics by an odd amount.
x1 += (x1 % 2);
for (int x = x1; x <= x2; x+=2) {
g.drawLine(x, y, x, y);
}
drawDashedLine(g, y, x1, x2, false);
}
// This method is slow -- revisit when Java2D is ready.
// assumes y1 <= y2
/**
* Draws a vertical dashed line. It is assumed {@code y1} &lt;= {@code y2}.
* If {@code y1} is greater than {@code y2}, the method draws nothing.
*
* @param g an instance of {@code Graphics}
* @param x an X coordinate
* @param y1 an Y1 coordinate
* @param y2 an Y2 coordinate
*/
protected void drawDashedVerticalLine(Graphics g, int x, int y1, int y2) {
// Drawing only even coordinates helps join line segments so they
// appear as one line. This can be defeated by translating the
// Graphics by an odd amount.
y1 += (y1 % 2);
for (int y = y1; y <= y2; y+=2) {
g.drawLine(x, y, x, y);
}
drawDashedLine(g, x, y1, y2, true);
}
private void drawDashedLine(Graphics g, int v, int v1, int v2, boolean isVertical) {
if (v1 >= v2) {
return;
}
v1 += (v1 % 2);
Graphics2D g2d = (Graphics2D) g;
Stroke oldStroke = g2d.getStroke();
BasicStroke dashedStroke = new BasicStroke(1, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_ROUND, 0, new float[]{1}, 0);
g2d.setStroke(dashedStroke);
if (isVertical) {
g2d.drawLine(v, v1, v, v2);
} else {
g2d.drawLine(v1, v, v2, v);
}
g2d.setStroke(oldStroke);
}
//
// Various local methods
//