我正在使用pdftron lib渲染和编辑pdf。我有一种情况，我必须获取注释的坐标并将其保存到db，如果形状被擦除，则从数据库中删除那些坐标。我已设法记录绘制坐标和已删除坐标，但绘制坐标和已删除坐标在此处不匹配。即使删除的坐标不匹配，即使lib成功删除了形状，我该如何从数据库中删除绘制的坐标。
我的提交方法
public void commitAnnotation() {
ArrayList<DrawPoints> points=new ArrayList<DrawPoints>();
try {
mPDFView.docLock(true);
pdftron.PDF.Rect rect = getShapeBBox();
if (rect != null) {
float sx = mPDFView.getScrollX();
float sy = mPDFView.getScrollY();
pdftron.PDF.Annots.Ink ink = pdftron.PDF.Annots.Ink.create(mPDFView.getDoc(), rect);
int pathIdx = 0;
ListIterator<LinkedList<PointF>> itrPaths = mStrokes.listIterator(0);
while (itrPaths.hasNext()) {
LinkedList<PointF> path = itrPaths.next();
ListIterator<PointF> itr = path.listIterator(0);
double[] pts = new double[2];
pdftron.PDF.Point p = new pdftron.PDF.Point();
int pointIdx = 0;
while (itr.hasNext()) {
PointF p_ = itr.next();
DrawPoints drawPoints=new DrawPoints();
pts = mPDFView.convScreenPtToPagePt(p_.x - sx, p_.y - sy, mPageForFreehandAnnot);
p.x = pts[0];
p.y = pts[1];
ink.setPoint(pathIdx, pointIdx++, p);
drawPoints.setPoint(p_);
drawPoints.setPathindex(pathIdx);
drawPoints.setPointindex(pointIdx);
points.add(drawPoints);
}
pathIdx++;
}
setStyle(ink);
ink.refreshAppearance();
Page page = mPDFView.getDoc().getPage(mPageForFreehandAnnot);
page.annotPushBack(ink);
mAnnot = ink;
mAnnotPageNum = mPageForFreehandAnnot;
buildAnnotBBox();
mPDFView.update(mAnnot, mAnnotPageNum); // Update the region where the annotation occupies.
}
mPaint.setStrokeJoin(oldStrokeJoin);
mPaint.setStrokeCap(oldStrokeCap);
} catch (Exception ex) {
mNextToolMode = ToolManager.e_pan;
} finally {
mPDFView.docUnlock();
mStrokePoints.clear();
mStrokes.clear();
}
if(mListener!=null){
mListener.getStrokePoints(points);
}else{
Log.e(TAG, " No Listener Registered ");
}
mPDFView.waitForRendering();
}
擦除片段
// Erase
double[] pt1points = mPDFView.convScreenPtToPagePt(mPrevPt.x, mPrevPt.y, mDownPageNum);
double[] pt2points = mPDFView.convScreenPtToPagePt(mCurrentPt.x, mCurrentPt.y, mDownPageNum);
Point pdfPt1 = new Point(pt1points[0], pt1points[1]);
Point pdfPt2 = new Point(pt2points[0], pt2points[1]);
try {
mPDFView.docLock(true);
Page page = mPDFView.getDoc().getPage(mDownPageNum);
int annot_num = page.getNumAnnots();
for (int i=annot_num-1;i>=0;--i) {
Annot annot = page.getAnnot(i);
if (!annot.isValid())
continue;
if (annot.getType() == Annot.e_Ink) {
Ink ink = new Ink(annot);
if (ink.erase(pdfPt1, pdfPt2, mEraserHalfThickness)) {
Log.i("Erased", "Erased onMove "+pdfPt1.x+" "+pdfPt1.y+" "+pdfPt2.x+" "+pdfPt2.y);
double[] pts = new double[2];
pts=mPDFView.convCanvasPtToPagePt(pdfPt1.x, pdfPt1.y, mDownPageNum);
for (int j = 0; j < pts.length; j++) {
Log.i("Erased ", "Erased converted pts "+pts[0]+" "+pts[1]);
}
// DrawPoints points=new DrawPoints();
if (!mInkList.contains(ink)) {
mInkList.add(ink);
mDoUpdate = true;
}
}
}
}
} catch (Exception ex) {
} finally {
mPDFView.docUnlock();
mPrevPt.x = mCurrentPt.x;
mPrevPt.y = mCurrentPt.y;
}
这是我的日志的样子：
03-06 14:53:04.947: E/Draw(1746): Draw Points x 1131.558 y 347.78265 pathIndex 0 pointIndex 1
03-06 14:53:04.947: E/Draw(1746): Draw Points x 1131.558 y 369.04636 pathIndex 0 pointIndex 2
03-06 14:53:04.947: E/Draw(1746): Draw Points x 1131.558 y 389.84354 pathIndex 0 pointIndex 3
03-06 14:53:04.951: E/Draw(1746): Draw Points x 1131.558 y 425.15198 pathIndex 0 pointIndex 4
03-06 14:53:04.951: E/Draw(1746): Draw Points x 1137.5557 y 475.53995 pathIndex 0 pointIndex 5
03-06 14:53:04.951: E/Draw(1746): Draw Points x 1137.5557 y 523.5142 pathIndex 0 pointIndex 6
03-06 14:53:04.955: E/Draw(1746): Draw Points x 1140.1648 y 553.43933 pathIndex 0 pointIndex 7
03-06 14:53:04.955: E/Draw(1746): Draw Points x 1143.5533 y 575.1314 pathIndex 0 pointIndex 8
03-06 14:53:04.955: E/Draw(1746): Draw Points x 1143.5533 y 585.5112 pathIndex 0 pointIndex 9
03-06 14:53:04.959: E/Draw(1746): Draw Points x 1143.5533 y 588.13245 pathIndex 0 pointIndex 10
03-06 14:53:04.959: E/Draw(1746): Draw Points x 1143.5533 y 589.7196 pathIndex 0 pointIndex 11
03-06 14:53:04.959: E/Draw(1746): Draw Points x 1143.5533 y 632.37 pathIndex 0 pointIndex 12
03-06 14:53:04.959: E/Draw(1746): Draw Points x 1137.4645 y 683.9676 pathIndex 0 pointIndex 13
03-06 14:53:04.963: E/Draw(1746): Draw Points x 1137.5557 y 708.979 pathIndex 0 pointIndex 14
03-06 14:53:04.963: E/Draw(1746): Draw Points x 1137.5557 y 711.25366 pathIndex 0 pointIndex 15
03-06 14:53:04.971: E/Draw(1746): Draw Points x 1137.5557 y 715.0531 pathIndex 0 pointIndex 16
03-06 14:53:29.295: I/Erased(1746): Erased onMove 197.8857521641508 607.0408325297578 199.44002904429334 593.6879611452792
03-06 14:53:29.311: I/Erased(1746): Erased onMove 199.44002904429334 593.6879611452792 199.44002904429334 589.8265169549495
03-06 14:53:29.327: I/Erased(1746): Erased onMove 199.44002904429334 589.8265169549495 200.99430592443588 585.3476263723171
03-06 14:53:29.351: I/Erased(1746): Erased onMove 200.99430592443588 585.3476263723171 200.99430592443588 583.0830710249556
03-06 14:53:29.379: I/Erased(1746): Erased onMove 200.99430592443588 583.0830710249556 200.99430592443588 581.9483495694424
03-06 14:53:29.511: I/Erased(1746): Erased onMove 200.99430592443588 581.9483495694424 200.99430592443588 576.6664117141074
03-06 14:53:29.527: I/Erased(1746): Erased onMove 200.99430592443588 576.6664117141074 202.54864607401095 572.73110046127
03-06 14:53:29.551: I/Erased(1746): Erased onMove 202.54864607401095 572.73110046127 202.54864607401095 568.2373890140615
03-06 14:53:29.563: I/Erased(1746): Erased onMove 202.54864607401095 568.2373890140615 202.54864607401095 563.1586725760926
03-06 14:53:29.587: I/Erased(1746): Erased onMove 202.54864607401095 563.1586725760926 204.10292295415348 560.3824098755857
03-06 14:53:29.619: I/Erased(1746): Erased onMove 204.10292295415348 560.3824098755857 204.10292295415348 554.1803288452473
03-06 14:53:29.639: I/Erased(1746): Erased onMove 204.10292295415348 554.1803288452473 204.10292295415348 550.7530078663927
03-06 14:53:29.667: I/Erased(1746): Erased onMove 204.10292295415348 550.7530078663927 204.70252736647586 546.8737375134407
03-06 14:53:29.679: I/Erased(1746): Erased onMove 204.70252736647586 546.8737375134407 205.65726310372855 545.2844568197372
03-06 14:53:29.699: I/Erased(1746): Erased onMove 205.65726310372855 545.2844568197372 205.65726310372855 542.818894485149
03-06 14:53:29.731: I/Erased(1746): Erased onMove 205.65726310372855 542.818894485149 205.65726310372855 537.4532037184695
03-06 14:53:29.755: I/Erased(1746): Erased onMove 205.65726310372855 537.4532037184695 205.65726310372855 534.3117340358978
03-06 14:53:29.775: I/Erased(1746): Erased onMove 205.65726310372855 534.3117340358978 205.65726310372855 531.5041846009924
03-06 14:53:29.803: I/Erased(1746): Erased onMove 205.65726310372855 531.5041846009924 205.65726310372855 526.8179600878776
03-06 14:53:29.815: I/Erased(1746): Erased onMove 205.65726310372855 526.8179600878776 205.65726310372855 524.163522679755
03-06 14:53:29.835: I/Erased(1746): Erased onMove 205.65726310372855 524.163522679755 205.65726310372855 521.9044401383096
03-06 14:53:29.871: I/Erased(1746): Erased onMove 205.65726310372855 521.9044401383096 205.65726310372855 516.5835283125208
03-06 14:53:29.895: I/Erased(1746): Erased onMove 205.65726310372855 516.5835283125208 205.65726310372855 511.1228068581439
03-06 14:53:29.923: I/Erased(1746): Erased onMove 205.65726310372855 511.1228068581439 205.65726310372855 509.33579337034837
03-06 14:53:29.947: I/Erased(1746): Erased onMove 205.65726310372855 509.33579337034837 205.65726310372855 502.5355314899201
03-06 14:53:29.971: I/Erased(1746): Erased onMove 205.65726310372855 502.5355314899201 205.65726310372855 499.1108203751584
03-06 14:53:29.991: I/Erased(1746): Erased onMove 205.65726310372855 499.1108203751584 205.65726310372855 495.58421383926714
03-06 14:53:30.019: I/Erased(1746): Erased onMove 205.65726310372855 495.58421383926714 205.65726310372855 489.60904862878675
03-06 14:53:30.031: I/Erased(1746): Erased onMove 205.65726310372855 489.60904862878675 205.65726310372855 485.9805783064822
03-06 14:53:30.071: I/Erased(1746): Erased onMove 205.65726310372855 485.9805783064822 205.65726310372855 480.81070643356
03-06 14:53:30.087: I/Erased(1746): Erased onMove 205.65726310372855 480.81070643356 205.65726310372855 478.3197888738754
03-06 14:53:30.115: I/Erased(1746): Erased onMove 205.65726310372855 478.3197888738754 205.65726310372855 473.6962801857806
03-06 14:53:30.127: I/Erased(1746): Erased onMove 205.65726310372855 473.6962801857806 205.65726310372855 470.0352577404266
03-06 14:53:30.155: I/Erased(1746): Erased onMove 205.65726310372855 470.0352577404266 205.65726310372855 468.72412528959234
03-06 14:53:30.187: I/Erased(1746): Erased onMove 205.65726310372855 468.72412528959234 205.65726310372855 463.74788951500426
03-06 14:53:30.215: I/Erased(1746): Erased onMove 205.65726310372855 463.74788951500426 205.65726310372855 459.25237488896795
03-06 14:53:30.235: I/Erased(1746): Erased onMove 205.65726310372855 459.25237488896795 205.65726310372855 456.2922195827403
03-06 14:53:30.251: I/Erased(1746): Erased onMove 205.65726310372855 456.2922195827403 205.65726310372855 452.85498112033275
03-06 14:53:30.279: I/Erased(1746): Erased onMove 205.65726310372855 452.85498112033275 205.65726310372855 451.0065646482427
03-06 14:53:30.303: I/Erased(1746): Erased onMove 205.65726310372855 451.0065646482427 205.65726310372855 445.2987127903066
03-06 14:53:30.327: I/Erased(1746): Erased onMove 205.65726310372855 445.2987127903066 205.65726310372855 439.7794671108165
03-06 14:53:30.355: I/Erased(1746): Erased onMove 205.65726310372855 439.7794671108165 204.10292295415348 435.30290167983037
03-06 14:53:30.375: I/Erased(1746): Erased onMove 204.10292295415348 435.30290167983037 204.10292295415348 431.77831976578085
03-06 14:53:30.403: I/Erased(1746): Erased onMove 204.10292295415348 431.77831976578085 204.10292295415348 427.22364822030573
03-06 14:53:30.439: I/Erased(1746): Erased onMove 204.10292295415348 427.22364822030573 204.10292295415348 424.5336850258036
03-06 14:53:30.463: I/Erased(1746): Erased onMove 204.10292295415348 424.5336850258036 204.10292295415348 422.06991005268503
03-06 14:53:30.543: I/Erased(1746): Erased onMove 204.10292295415348 422.06991005268503 204.10292295415348 420.3948518257953
03-06 14:53:30.811: I/Erased(1746): Erased onMove 204.10292295415348 420.3948518257953 206.43440154379988 411.2446050466984
03-06 14:53:30.827: I/Erased(1746): Erased onMove 206.43440154379988 411.2446050466984 205.65726310372855 409.66018028194344
03-06 14:53:30.847: I/Erased(1746): Erased onMove 205.65726310372855 409.66018028194344 205.65726310372855 404.82079628997155
03-06 14:53:30.879: I/Erased(1746): Erased onMove 205.65726310372855 404.82079628997155 205.65726310372855 402.87418565855637
最佳答案
您正在通过比较坐标来在Page上搜索注解，我认为使用UDID查找注解要简单得多，并且您不必处理从页面到屏幕的坐标转换，反之亦然。
使用此功能设置UDID
public void SetUniqueID(string data);
和
public Obj GetUniqueID()
查找注释功能可能如下所示：
IAnnot FindAnnotOnPageByUDID(int pageIndex, long annotId)
{
IAnnot result = null;
Page page = _doc.GetPage(pageIndex);
if (page != null && page.IsValid())
{
int num_annots = page.GetNumAnnots();
for (int i = 0; i < num_annots; ++i)
{
IAnnot annot = page.GetAnnot(i);
if (annot.IsValid())
{
var UniqueIdObj = annot.GetUniqueID();
if (UniqueIdObj != null)
{
var strUniqueId = UniqueIdObj.GetAsPDFText();
if (strUniqueId.Contains(annotId.ToString()))
{
result = annot;
break;
}
}
}
}
}
return result;
}
PdfTron文档也建议使用此方法。
只需跟踪注释集合的对象即可。
关于android - PDFTron墨水注释，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28901409/