[
https://issues.apache.org/jira/browse/PDFBOX-3353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16144666#comment-16144666
]
chitgoks edited comment on PDFBOX-3353 at 8/29/17 2:35 AM:
-----------------------------------------------------------
The arrows that you created lacks a sharper tip to make it look like the line
dimension arrow point in Acrobat.
for line arrows, here is my code in case you are interested (same as acrobat).
{code:java}
double arrowMeasureAngle = Math.atan2(ym2 - ym1, xm2 - xm1);
int arrowMeasureLength = 10;
int distanceMeasure = 1;
// Draw start arrow head.
float[] lineMeasureProp = lengthenEndLine(xm2, ym2, xm1, ym1,
-distanceMeasure);
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm1 + arrowMeasureLength *
Math.cos(arrowMeasureAngle - Math.PI / 6)),
(float) (ym1 + arrowMeasureLength *
Math.sin(arrowMeasureAngle - Math.PI / 6)));
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm1 + arrowMeasureLength *
Math.cos(arrowMeasureAngle + Math.PI / 6)),
(float) (ym1 + arrowMeasureLength *
Math.sin(arrowMeasureAngle + Math.PI / 6)));
// Draw end arrow head.
lineMeasureProp =lengthenEndLine(xm1, ym1, xm2, ym2,
-distanceMeasure);
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm2 - arrowMeasureLength *
Math.cos(arrowMeasureAngle - Math.PI / 6)),
(float) (ym2 - arrowMeasureLength *
Math.sin(arrowMeasureAngle - Math.PI / 6)));
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm2 - arrowMeasureLength *
Math.cos(arrowMeasureAngle + Math.PI / 6)),
(float) (ym2 - arrowMeasureLength *
Math.sin(arrowMeasureAngle + Math.PI / 6)));
cs.stroke();
{code}
This is before you rotate the matrix.
It uses this custom code to shorten or lengthen the line segment
{code:java}
public static float[] lengthenEndLine(float startX, float startY, float endX,
float endY, int distance) {
float dx = endX - startX;
float dy = endY - startY;
// Vertical line
if (dx == 0) {
if (endY < startY)
endY -= distance;
else
endY += distance;
}
// Horizontal line
else if (dy == 0) {
if (endX < startX)
endX -= distance;
else
endX += distance;
}
// Diagonal
else {
float length = (float) Math.sqrt(dx * dx + dy * dy);
float scale = (length + distance) / length;
dx *= scale;
dy *= scale;
endX = startX + dx;
endY = startY + dy;
}
return new float[] { startX, startY, endX, endY };
}
{code}
im not good at math or geometry so the code looks like a hack.
arrow length 10 is same as in Acrobat. the angle is a little bit fat although
not noticeable.
was (Author: chitgoks):
The arrows that you created lacks a sharper tip to make it look like the line
dimension arrow point in Acrobat.
for line arrows, here is my code in case you are interested (same as acrobat).
{code:java}
double arrowMeasureAngle = Math.atan2(ym2 - ym1, xm2 - xm1);
int arrowMeasureLength = 10;
int distanceMeasure = 1;
// Draw start arrow head.
float[] lineMeasureProp = lengthenEndLine(xm2, ym2, xm1, ym1,
-distanceMeasure);
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm1 + arrowMeasureLength *
Math.cos(arrowMeasureAngle - Math.PI / 6)),
(float) (ym1 + arrowMeasureLength *
Math.sin(arrowMeasureAngle - Math.PI / 6)));
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm1 + arrowMeasureLength *
Math.cos(arrowMeasureAngle + Math.PI / 6)),
(float) (ym1 + arrowMeasureLength *
Math.sin(arrowMeasureAngle + Math.PI / 6)));
// Draw end arrow head.
lineMeasureProp =lengthenEndLine(xm1, ym1, xm2, ym2,
-distanceMeasure);
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm2 - arrowMeasureLength *
Math.cos(arrowMeasureAngle - Math.PI / 6)),
(float) (ym2 - arrowMeasureLength *
Math.sin(arrowMeasureAngle - Math.PI / 6)));
cs.moveTo(lineMeasureProp[2], lineMeasureProp[3]);
cs.lineTo((float) (xm2 - arrowMeasureLength *
Math.cos(arrowMeasureAngle + Math.PI / 6)),
(float) (ym2 - arrowMeasureLength *
Math.sin(arrowMeasureAngle + Math.PI / 6)));
cs.stroke();
{code}
This is before you rotate the matrix.
It uses this custom code to shorten the line segment
{code:java}
public static float[] lengthenEndLine(float startX, float startY, float endX,
float endY, int distance) {
float dx = endX - startX;
float dy = endY - startY;
// Vertical line
if (dx == 0) {
if (endY < startY)
endY -= distance;
else
endY += distance;
}
// Horizontal line
else if (dy == 0) {
if (endX < startX)
endX -= distance;
else
endX += distance;
}
// Diagonal
else {
float length = (float) Math.sqrt(dx * dx + dy * dy);
float scale = (length + distance) / length;
dx *= scale;
dy *= scale;
endX = startX + dx;
endY = startY + dy;
}
return new float[] { startX, startY, endX, endY };
}
{code}
im not good at math or geometry so the code looks like a hack.
arrow length 10 is same as in Acrobat. the angle is a little bit fat although
not noticeable.
> Create appearance streams for annotations
> -----------------------------------------
>
> Key: PDFBOX-3353
> URL: https://issues.apache.org/jira/browse/PDFBOX-3353
> Project: PDFBox
> Issue Type: Task
> Components: PDModel, Rendering
> Affects Versions: 1.8.12, 2.0.0, 2.0.1, 2.0.2, 3.0.0
> Reporter: Tilman Hausherr
> Labels: Annotations
> Attachments: line_dimension_appearance_stream-noAP.pdf,
> line_dimension_appearance_stream.pdf,
> PDFBOX-3353-highlight-noAP-001796-p1.pdf, PDFBOX-3353-highlight-noAP.pdf,
> ShowAnnotation-4.java, showAnnotation.java, SquareAnnotations.pdf,
> text_markup_ap_test.pdf
>
>
> Create appearance streams for annotations when missing.
> I'll start by replacing current code for Ink and Link annotations.
> Good example PDFs:
> http://www.pdfill.com/example/pdf_commenting_new.pdf
> https://github.com/mozilla/pdf.js/issues/6810
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org
For additional commands, e-mail: dev-h...@pdfbox.apache.org
