Make parallel lines

And make TODO for P2P

Canvas.cpp

@@ -1,21 +1,43 @@
 #include "Canvas.h"
+
 void Canvas::changeMode(Mode _mode)
 {
 	mode = _mode;
 }
 
+// TODO
+Line* Canvas::findAt(QPointF& pos)
+{
+	for (Line* line : lines) {
+		if (line->contains(pos)) {
+			return line;
+		}
+	}
+	return nullptr;
+}
+
+LinePair Canvas::makeOrderedPair(Line* l1, Line* l2)
+{
+	return (l1 < l2) ? std::make_pair(l1, l2) : std::make_pair(l2, l1);
+}
+
+bool Canvas::areAlreadyParallel(Line* l1, Line* l2)
+{
+	return parallelPairs.count(makeOrderedPair(l1, l2)) > 0;
+}
+
 void Canvas::mousePressEvent(QMouseEvent* event)
 {
 	QPointF scene = event->pos();
 
 	#ifdef _DEBUG
 		qDebug() << "Scene point in" << scene.x() << scene.y();
-	changeMode(DrawingLine);
 	#endif
 	
-	if (mode == DrawingLine) {
+	if (mode == Mode::DrawingLine) {
 		if (!current_line) {
 			current_line = new Line();
+			current_line->set_tag(obj_count);
 			double* x1 = new double(scene.x());
 			double* y1 = new double(scene.y());
 
@@ -25,6 +47,9 @@ void Canvas::mousePressEvent(QMouseEvent* event)
 			params.push_back(x1);
 			params.push_back(y1);
 
+			points.push_back(Point(x1, y1, obj_count));
+			points.push_back(Point(x2, y2, obj_count));
+
 			current_line->p1.x = x1;
 			current_line->p1.y = y1;
 			current_line->p2.x = x2;
@@ -39,25 +64,83 @@ void Canvas::mousePressEvent(QMouseEvent* event)
 
 			lines.append(current_line);
 			current_line = nullptr;
+			mode = Mode::None;
+			obj_count++;
+			update();
+			return;
+		}	
 	}
 
-//#ifdef _DEBUG
-//		if (lines.size()) {
-//			qDebug() << "Line coords" << lines[lines.size() - 1]->p1.get_X() <<
-//				lines[lines.size() - 1]->p1.get_Y() <<
-//				lines[lines.size() - 1]->p2.get_X() <<
-//				lines[lines.size() - 1]->p2.get_Y();
-//			changeMode(None);
-//		}
-//#endif		
+	else if (mode == Mode::Parallel) {
+		static Line* first = nullptr;
+		Line* found = findAt(scene);
 
+		if (!found) {
+			first = nullptr;
+			return;
 		}
 
+		if (!first) {
+			first = found;
+			return;
+		}
+
+		if (found == first){
+			first = nullptr;
+			return;
+		}
+
+		if (!areAlreadyParallel(found, first)) {
+			sys.addConstraintParallel(*found, *first, constraints_count++);
+			parallelPairs.insert(makeOrderedPair(found, first));
+			first = nullptr;
+			mode = Mode::None;
+		}
+
+		else {
+			
+		#ifdef _DEBUG
+			qDebug() << "Line" << first << "and" << found << "are parallel. Abort!";
+		#endif
+			QMessageBox::information(this,
+				QString("Wrong"),
+				QString("Parallel lines can not be more parallel!"),
+				QMessageBox::Ok
+			);
+			first = nullptr;
+			return;
+		}
+
+		update();
+	}
+}
+
+void Canvas::paintEvent(QPaintEvent*)
+{
+	QPainter p(this);
+	p.setRenderHint(QPainter::Antialiasing);
+	if (!params.empty()) {
+		int res = sys.solve(params);
+		if (res == SolveStatus::Success) {
+			sys.applySolution();
+		}
+		else {
+		#ifdef _DEBUG
+			qDebug() << "INVAILD LAST CONSTRAINT. REMOVE HIM";
+		#endif
+			sys.removeConstraint(sys.get_last_constraint());
+		}
+	}
+	for (Line* line : lines) {
+		line->draw(p);
+	}
+	return;
 }
 
 Canvas::Canvas(QWidget *parent)
 	: QWidget(parent)
 {
+	sys = System();
 	current_line = nullptr;
 	setMouseTracking(true);
 	setBackgroundRole(QPalette::Base);
@@ -76,6 +159,7 @@ Canvas::~Canvas()
 
 	lines.clear();
 	params.clear();
+	points.clear();
 
 	if (current_line) 
 		delete current_line;

Canvas.h

@@ -2,33 +2,65 @@
 
 #include <QWidget>
 #include <QMouseEvent>
+#include <QPointF>
+#include <QMessageBox>
+
 #ifdef _DEBUG
 #include <QDebug>
 #endif
 
+// GCS — ãåîìåòðè÷åñêèé ñîëâåð èç FreeCAD
 #include "GCS/Geo.h"
+#include "GCS/GCS.h"
 using namespace GCS;
 
-enum Mode {
-	None,
-	DrawingLine
+enum class Mode : int
+{
+    None = 0,
+    DrawingLine = 1,
+    Parallel = 2
 };
 
+// Óäîáíûé òèï äëÿ õðàíåíèÿ ïàðû ïàðàëëåëüíûõ ëèíèé (ïîðÿäîê íå âàæåí)
+using LinePair = std::pair<Line*, Line*>;
+
+// ===================================================================
+// Îñíîâíîé êëàññ õîëñòà
+// ===================================================================
 
 class Canvas : public QWidget
 {
     Q_OBJECT
-private:
-	void changeMode(Mode);
-	Mode mode = Mode::None;
-	QVector<Line*> lines;
-	QVector<Point> points;
-	QVector<double*> params;
-	Line* current_line;
-protected:
-	void mousePressEvent(QMouseEvent*) override;
-public:
-	Canvas(QWidget *parent);
-	~Canvas();
-};
 
+public:
+    explicit Canvas(QWidget* parent = nullptr);
+    ~Canvas() override;
+
+    void changeMode(Mode newMode);
+
+protected:
+    void mousePressEvent(QMouseEvent* event) override;
+    void paintEvent(QPaintEvent* event) override;
+
+private:
+    // ====================== Ïîèñê è âûáîð ======================
+    Line* findAt(QPointF&);                    // èùåò ëèíèþ ïîä êóðñîðîì
+
+    // ====================== Ïàðàëëåëüíîñòü ======================
+    LinePair makeOrderedPair(Line* l1, Line* l2);
+    bool areAlreadyParallel(Line* l1, Line* l2);           // ïðîâåðêà íà äóáëèêàò
+
+    // ====================== Äàííûå ñöåíû ======================
+    System               sys;                     // ãåîìåòðè÷åñêèé ñîëâåð
+    QVector<Line*>       lines;                   // çàâåðø¸ííûå ëèíèè
+    QVector<Point>       points;                  // âñå òî÷êè (äëÿ óäîáíîãî äîñòóïà)
+    std::vector<double*> params;                  // âñå ïàðàìåòðû, ïåðåäàâàåìûå â ñîëâåð
+
+    std::set<LinePair> parallelPairs;           // óæå çàïàðàëëåëåííûå ïàðû (çàùèòà îò äóáëåé)
+
+    Line* current_line{ nullptr };
+    Mode mode{ Mode::None };
+
+    int obj_count{ 0 };            // òåã äëÿ íîâûõ îáúåêòîâ
+    int constraints_count{ 0 };    // òåã äëÿ íîâûõ îãðàíè÷åíèé
+};

DRAWer_2_0.cpp

@@ -14,5 +14,18 @@ DRAWer_2_0::~DRAWer_2_0()
 void DRAWer_2_0::on_pushButton_clicked()
 {
     ui.label->setText(QString::number(counter++));
+    ui.widget->changeMode(Mode::DrawingLine);
+}
+
+
+void DRAWer_2_0::on_pushButton_2_clicked()
+{  
+    ui.widget->changeMode(Mode::Parallel);
+}
+
+
+void DRAWer_2_0::on_pushButton_3_clicked()
+{
+    return;
 }
 

DRAWer_2_0.h

@@ -14,6 +14,10 @@ public:
 private slots:
     void on_pushButton_clicked();
 
+    void on_pushButton_2_clicked();
+
+    void on_pushButton_3_clicked();
+
 private:
     Ui::DRAWer_2_0Class ui;
     int counter;

GCS/GCS.h

@@ -250,6 +250,9 @@ public:
     void clearByTag(int tagId, bool is_fixed_point = false);
     int addConstraint(Constraint* constr);
     void removeConstraint(Constraint* constr);
+    Constraint* get_last_constraint() {
+        return clist[clist.size() - 1];
+    }
 
     // basic constraints
     int addConstraintFixed(Point& p, int tagId = 0, bool driving = true);

GCS/Geo.cpp

@@ -143,6 +143,33 @@ Line::Line(Point _p1, Point _p2, int _tag) {
     tag = _tag;
 }
 
+void Line::set_tag(int _tag) {
+    tag = _tag;
+    p1.set_tag(_tag);
+    p2.set_tag(_tag);
+}
+
+// TODO
+bool Line::contains(QPointF pos, qreal tol) const
+{
+    double x1 = *p1.x, y1 = *p1.y;
+    double x2 = *p2.x, y2 = *p2.y;
+
+    double A = y1 - y2;
+    double B = x2 - x1;
+    double C = x1 * y2 - x2 * y1;
+    
+    try {
+        double distance = abs(A * pos.x() + B * pos.y() + C) / sqrt(A * A + B * B);
+        return distance < tol;
+    }
+    catch (...) {
+        return false;
+    }
+    
+    
+}
+
 DeriVector2 Line::CalculateNormal(const Point& p, const double* derivparam) const
 {
     (void)p;

GCS/Geo.h

@@ -227,11 +227,8 @@ public:
     Line* Copy() override;
 
     void draw(QPainter& p, bool highlight = false);
-    void set_tag(int _tag) {
-        tag = _tag;
-        p1.set_tag(_tag);
-        p2.set_tag(_tag);
-    }
+    void set_tag(int);
+    bool contains(QPointF, qreal tol = 10.0) const;
 };
 
 class Circle: public Curve