From b9943a460a5543258ba2759ecd8d74dec55f5d04 Mon Sep 17 00:00:00 2001
From: peri4 <peri4ko@yandex.ru>
Date: Fri, 22 Oct 2021 21:23:01 +0300
Subject: [PATCH] graphic free trace mode

---
 libs/graphic/graphic.cpp | 48 +++++++++++++++++++++++++++++++++++-----
 libs/graphic/graphic.h   |  2 +-
 libs/graphic/graphic.ui  | 14 ++++++++++++
 3 files changed, 57 insertions(+), 7 deletions(-)

diff --git a/libs/graphic/graphic.cpp b/libs/graphic/graphic.cpp
index 8c6096c..8c120ce 100644
--- a/libs/graphic/graphic.cpp
+++ b/libs/graphic/graphic.cpp
@@ -104,14 +104,17 @@ Graphic::Graphic(QWidget * parent): QFrame(parent), canvas(0), line_x_min(this),
 #endif
 	QActionGroup * agroup = new QActionGroup(this);
 	agroup->addAction(ui->graphic_actionGuidesFree  );
+	agroup->addAction(ui->graphic_actionGuidesTrace );
 	agroup->addAction(ui->graphic_actionGuidesTraceX);
 	agroup->addAction(ui->graphic_actionGuidesTraceY);
-	ui->graphic_actionGuidesFree  ->setProperty("_value", (int)Free  );
-	ui->graphic_actionGuidesTraceX->setProperty("_value", (int)TraceX);
-	ui->graphic_actionGuidesTraceY->setProperty("_value", (int)TraceY);
+	ui->graphic_actionGuidesFree  ->setProperty("_value", (int)Free   );
+	ui->graphic_actionGuidesTrace ->setProperty("_value", (int)TraceXY);
+	ui->graphic_actionGuidesTraceX->setProperty("_value", (int)TraceX );
+	ui->graphic_actionGuidesTraceY->setProperty("_value", (int)TraceY );
 	ui->graphic_actionGuidesFree->setChecked(true);
 	connect(agroup, SIGNAL(triggered(QAction*)), this, SLOT(actionGuidesTriggered(QAction*)));
 	ui->graphic_checkGuides  ->addAction(ui->graphic_actionGuidesFree  );
+	ui->graphic_checkGuides  ->addAction(ui->graphic_actionGuidesTrace );
 	ui->graphic_checkGuides  ->addAction(ui->graphic_actionGuidesTraceX);
 	ui->graphic_checkGuides  ->addAction(ui->graphic_actionGuidesTraceY);
 	ui->graphic_buttonAutofit->addAction(ui->graphic_actionExpandX);
@@ -1365,7 +1368,7 @@ void Graphic::drawGuides() {
 	QPointF rpos = canvas2real(apos);
 	QString str;
 	str = pointCoords(rpos) + fp_size;
-	auto trace_func = [&](bool on_x, double cursor) {
+	auto trace_axis_func = [&](bool on_x, double cursor) {
 		if (curTrace >= 0 && curTrace < graphics.size()) {
 			if (graphics[curTrace].visible) {
 				QPolygonF & pol(pause_ ? graphics[curTrace].polyline_pause : graphics[curTrace].polyline);
@@ -1388,12 +1391,45 @@ void Graphic::drawGuides() {
 			}
 		}
 	};
+	auto trace_free_func = [&](QPointF cursor) {
+		double min_dist = -1;
+		int gr = -1, mag_dist = fontHeight(this) * 2;
+		QPointF point, scale = getScale(), dp;
+		for (int g = 0; g < graphics.size(); ++g) {
+			if (graphics[g].visible) {
+				QPolygonF & pol(pause_ ? graphics[g].polyline_pause : graphics[g].polyline);
+				double dist = 0.;
+				for (int i = 0; i < pol.size(); ++i) {
+					point = pol[i];
+					if (!selrect.contains(point)) continue;
+					dp = point - cursor;
+					dp = QPointF(dp.x() * scale.x(), dp.y() * scale.y());
+					if (dp.manhattanLength() <= mag_dist) {
+						dist = QVector2D(dp).lengthSquared();
+						if (min_dist > dist || min_dist < 0) {
+							min_dist = dist;
+							gr = g;
+							rpos = point;
+						}
+					}
+				}
+			}
+			if (gr >= 0) {
+				apos = real2canvas(rpos).toPoint();
+				str = graphics[gr].name + ": " + pointCoords(rpos) + fp_size;
+				emit graphicTraceEvent(curTrace, point);
+			}
+		}
+	};
 	switch (floating_axis_type) {
+	case TraceXY:
+		trace_free_func(rpos);
+		break;
 	case TraceX:
-		trace_func(true, rpos.x());
+		trace_axis_func(true, rpos.x());
 		break;
 	case TraceY:
-		trace_func(false, rpos.y());
+		trace_axis_func(false, rpos.y());
 		break;
 	default: break;
 	}
diff --git a/libs/graphic/graphic.h b/libs/graphic/graphic.h
index 7145380..009375a 100644
--- a/libs/graphic/graphic.h
+++ b/libs/graphic/graphic.h
@@ -148,7 +148,7 @@ public:
 	enum Alignment {Left, Right};
 	enum Graduation {Auto, Fixed};
 	enum AxisType {Numeric, DateTime};
-	enum FloatingAxisType {Free, TraceX, TraceY};
+	enum FloatingAxisType {Free, TraceXY, TraceX, TraceY};
 	Q_DECLARE_FLAGS(Buttons, Button)
 
 	QString caption() const;
diff --git a/libs/graphic/graphic.ui b/libs/graphic/graphic.ui
index db27bb1..9bb67c8 100644
--- a/libs/graphic/graphic.ui
+++ b/libs/graphic/graphic.ui
@@ -463,6 +463,17 @@
     <string>Only expand Y</string>
    </property>
   </action>
+  <action name="graphic_actionGuidesTrace">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Free trace</string>
+   </property>
+   <property name="toolTip">
+    <string>Free trace</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>
@@ -475,6 +486,9 @@
   <include location="../application/qad_application.qrc"/>
   <include location="../blockview/qad_blockview.qrc"/>
   <include location="qad_graphic.qrc"/>
+  <include location="../application/qad_application.qrc"/>
+  <include location="../blockview/qad_blockview.qrc"/>
+  <include location="qad_graphic.qrc"/>
  </resources>
  <connections/>
 </ui>