save correct color to db

use different pointer for highlighter

lib/canvas/my_painter.dart

@@ -40,7 +40,8 @@ class MyPainter extends CustomPainter {
   void paint(Canvas canvas, Size size) {
     var paint = Paint()
       ..color = Colors.blue
-      ..strokeCap = StrokeCap.square;
+      ..strokeCap = StrokeCap.square
+      ..isAntiAlias = true;
 
     // clipping canvas to reqired size
     canvas.clipRect(Offset.zero & size);
@@ -59,8 +60,24 @@ class MyPainter extends CustomPainter {
         Offset pt2 = stroke.points[i + 1].point;
         pt2 = _translatept(pt2, size);
 
-        canvas.drawLine(
-            pt1, pt2, paint..strokeWidth = stroke.points[i].thickness * zoom);
+        final zoomedthickness = stroke.points[i].thickness * zoom;
+
+        // only temporary solution to differ from highlighter and pen
+        if (stroke.color.opacity != 1.0) {
+          final off = Offset(zoomedthickness / 2, zoomedthickness / 2);
+          canvas.drawPath(
+              Path()
+                ..moveTo((pt1 - off).dx, (pt1 - off).dy)
+                ..lineTo((pt1 + off).dx, (pt1 + off).dy)
+                ..lineTo((pt2 + off).dx, (pt2 + off).dy)
+                ..lineTo((pt2 - off).dx, (pt2 - off).dy)
+                ..lineTo((pt1 - off).dx, (pt1 - off).dy),
+              paint
+                ..style = PaintingStyle.fill
+                ..strokeWidth = 0);
+        } else {
+          canvas.drawLine(pt1, pt2, paint..strokeWidth = zoomedthickness);
+        }
       }
     }
   }

lib/canvas/paint_controller.dart

@@ -62,19 +62,20 @@ class PaintController extends ChangeNotifier {
       if (activePen == Pen.eraser || activePen == Pen.selector) return;
 
       int strokeid = strokes.isNotEmpty ? strokes.last.id + 1 : 0;
-      strokes.add(Stroke.fromPoints(
-          [Point(offset, _calcTiltedWidth(3.0, e.tilt))],
-          strokeid,
-          activePen == Pen.pen
+      final color = activePen == Pen.pen
           ? const Color(0xFF444444)
-              : Colors.yellow.withOpacity(.5)));
-      file.addStroke(strokeid);
+          : Colors.yellow.withOpacity(.3);
+      strokes.add(Stroke.fromPoints(
+          [Point(offset, _calcTiltedWidth(3.0, e.tilt))], strokeid, color));
+      file.addStroke(strokeid, color);
       notifyListeners();
     }
   }
 
   void pointUpEvent(PointerUpEvent e) {
     if (activePen == Pen.eraser) return;
+
+    // pointerupevent doesn't deliver correct event button
     if (_allowedToDraw(e.kind, 1)) {
       final lastStroke = strokes.last;
       if (lastStroke.points.length <= 1) {
@@ -122,20 +123,24 @@ class PaintController extends ChangeNotifier {
           }
           break;
         case Pen.pen:
-        case Pen.highlighter:
           final pts = strokes.last.points;
+          // avoid duplicates
           if (pts.last.point == offset) return;
 
-          double newWidth = _calcTiltedWidth(5.0, event.tilt);
+          double newWidth = _calcTiltedWidth(4.0, event.tilt);
           if (pts.length > 1) {
             newWidth = _calcAngleDependentWidth(pts.last,
                 pts[pts.length - (pts.length > 5 ? 5 : pts.length)], newWidth);
           }
 
-          Point p = Point(offset, newWidth);
-          strokes.last.addPoint(p);
-          // // todo do a batch commit per stroke
-          // file.addPoint(strokes.last.id, p);
+          strokes.last.addPoint(Point(offset, newWidth));
+          break;
+        case Pen.highlighter:
+          final pts = strokes.last.points;
+          // avoid duplicates
+          if (pts.last.point == offset) return;
+
+          strokes.last.addPoint(Point(offset, 15.0));
           break;
         case Pen.selector:
           // TODO: Handle this case.

lib/export/export_pdf.dart

@@ -47,9 +47,9 @@ void exportPDF(List<Stroke> strokes, String name) async {
 
   const PdfPageFormat a4 = PdfPageFormat(_a4width, _a4height);
 
-  pdf.addPage(pw.MultiPage(
+  pdf.addPage(pw.Page(
     pageFormat: a4,
-    build: (context) => [_StrokePDFPaint(strokes)],
+    build: (context) => _StrokePDFPaint(strokes),
   ));
 
   final path = await getSavePath();

lib/savesystem/line_loader.dart

@@ -5,9 +5,13 @@ import 'note_file.dart';
 
 extension LineLoading on NoteFile {
   Future<List<Stroke>> loadStrokes() async {
-    final query = await db().query('points',
-        orderBy: 'strokeid',
-        columns: ['x', 'y', 'thickness', 'strokeid', 'id']);
+    const sql = '''
+SELECT x, y, thickness, strokeid, points.id, s.color
+from points
+         JOIN strokes s on s.id = strokeid
+ORDER BY strokeid
+''';
+    final query = await db().rawQuery(sql);
     int strokeid = -1;
     List<Stroke> strokes = [];
 
@@ -15,7 +19,7 @@ extension LineLoading on NoteFile {
       final int csid = i['strokeid'] as int;
       if (csid != strokeid) {
         strokeid = csid;
-        strokes.add(Stroke(strokeid, Colors.green));
+        strokes.add(Stroke(strokeid, Color(i['color'] as int)));
       }
       final Point p = Point(
           Offset(i['x'] as double, i['y'] as double), i['thickness'] as double);
@@ -26,11 +30,12 @@ extension LineLoading on NoteFile {
   }
 
   // create new stroke in file and return strokeid
-  Future<void> addStroke(int newStrokeId) async {
+  Future<void> addStroke(int newStrokeId, Color color) async {
     await db().insert(
-        'strokes', {'color': 0xffffff, 'elevation': 0, 'id': newStrokeId});
+        'strokes', {'color': color.value, 'elevation': 0, 'id': newStrokeId});
   }
 
+  // add one point to a stroke in db
   Future<void> addPoint(int strokeid, Point p) async {
     await db().insert('points', {
       'x': p.point.dx,
@@ -40,6 +45,7 @@ extension LineLoading on NoteFile {
     });
   }
 
+  // add list of points to a stroke in db
   Future<void> addPoints(int strokeid, List<Point> pts) async {
     final batch = db().batch();
     for (final p in pts) {