我正在使用pdftron lib来渲染和编辑pdf。我有一个场景，我必须获取注释的坐标并将其保存到db，如果形状被删除，则从数据库中删除这些坐标。我已经记录了两个绘制的坐标和擦除坐标但绘制的坐标和擦除的坐标在这里不匹配。如果擦除的坐标不匹配，我怎么想从我的数据库中删除绘制的坐标，即使lib成功删除了形状。
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;
}
这就是我的日志的样子：
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
答案 0 :(得分：1)
您通过比较坐标来搜索页面注释，我认为使用UDID查找注释要简单得多，并且您不必在页面之间处理坐标转换，反之亦然。
使用此功能设置UDID
public void SetUniqueID(string data);
和
public Obj GetUniqueID()
查找注释函数可能如下所示：
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文档也推荐这种方法。
只需跟踪注释集合的udids即可。
答案 1 :(得分：0)
首先传递鼠标坐标（pdfPt [1 | 2]），当然这与墨点不符。
此外，在擦除时，PDFNet可能会创建/修改/删除其他周围的点。例如，当擦除两个墨点之间的中点时。
您应该做的是在擦除后从Annotation重新加载整个Ink列表，并替换数据库中的内容。这将为您节省很多麻烦，并将保护您免受我们库中未来可能的实施更改。