Стиль и направление текста

main.cpp

@@ -11,7 +11,7 @@ int main(int argc, char *argv[])
      * (int w = 640, int h = 480, int x = -1, int y = -1, QWidget *parent = nullptr)
      * В случае отрицательного значения x или y, окно создаётся в центре экрана.
      */
-    QTSGraph w(800, 600);
+    QTSGraph w(600, 600);
 
     w.show();
     return a.exec();
@@ -22,9 +22,17 @@ void QTSGraph::PaintBox()
     // Начало рисования
 
     SetColor(clGreen);
-    Line(0, 0, 800, 600);
+    Line(0, 0, 600, 600);
     SetColor(0xFF0000);
-    Line(800, 0, 0, 600);
+    Line(600, 0, 0, 600);
+    Rectangle(0,0,600,600);
+    SetColor(clBlue);
+    SetTextStyle(0, 45, 10);
+    OutTextXY(30, 30, "Hello world!");
+    SetTextStyle(1, 0, 20);
+    OutTextXY(210, 50, "Hello world!");
+    SetTextStyle(2, 0, 30);
+    OutTextXY(160, 550, "Hello world!");
 
     // Конец рисования
 }

qtsgraph.cpp

@@ -66,6 +66,7 @@ QTSGraph::QTSGraph(int w, int h, int x, int y, QWidget *parent)
     Canvas.fill(Qt::white);
     QRgb DefaultColor = 0x00000000;
     Pen = QPen(QBrush(QColor(DefaultColor)), 1);
+    Font = QFont();
     Brush = QBrush(QColor(DefaultColor),Qt::NoBrush);
     ResetInterval = 1000;
     ResetTimer = new QTimer();
@@ -102,7 +103,20 @@ void QTSGraph::OutTextXY(int x, int y, std::string caption)
 {
     QPainter painter(&Canvas);
     painter.setPen(Pen);
+    painter.setFont(Font);
+    double r, b, sa, ca, sb, cb, xn, yn;
+    b = TextDirection*3.14159/180;
+    r = sqrt(x * x + y * y);
+    sa = y / r;
+    ca = x / r;
+    sb = sin(b);
+    cb = cos(b);
+    xn = r * (ca * cb - sa * sb);
+    yn = r * (sa * cb + sb * ca);
+    painter.translate(x - xn, y - yn);
+    painter.rotate(TextDirection);
     painter.drawText(x, y, QString::fromStdString(caption));
+    //painter.rotate(-TextDirection);
     update();
 }
 
@@ -157,6 +171,17 @@ void QTSGraph::SetPenWidth(int PenWidth)
     Pen.setWidth(PenWidth);
 }
 
+void QTSGraph::SetTextStyle(int idFont, int Direction, int CharSize)
+{
+    QString f;
+    if(idFont == 0) f = "serif";
+    else if(idFont == 1) f = "sans";
+    else if(idFont == 3) f = "mono";
+    TextDirection = Direction;
+    Font.setFamily(f);
+    Font.setPointSize(CharSize);
+}
+
 void QTSGraph::Line(int x1, int y1, int x2, int y2)
 {
     QPainter painter(&Canvas);

qtsgraph.h

@@ -50,6 +50,7 @@ along with Vesi.  If not, see <http://www.gnu.org/licenses/>.
 #include <QTime>
 #include <string>
 #include <QDebug>
+#include <math.h>
 
 #define clRed       0x00FF0000
 #define clGreen     0x0000FF00
@@ -110,26 +111,36 @@ public:
         5 - DashDotDotLine
      */
     void SetPenWidth(int PenWidth);
+    void SetTextStyle(int idFont, int Direction, int CharSize);
+    /*
+        0 - serif
+        1 - sans
+        2 - mono
+     */
 
 private slots:
-    void slotStartTimer();
     void slotResetTimer();
+    void slotStartTimer();
 
 private:
-    QPixmap Canvas;
-    QTimer *StartTimer;
-    QTimer *ResetTimer;
     bool EventMouseClicked = false;
     bool EventKeyPressed = false;
     int IDPressedKey = -1;
-    void PaintBox();
+    int ResetInterval;
+    int TextDirection = 0;
+
     QBrush Brush;
+    QPixmap Canvas;
+    QFont Font;
     QPen Pen;
-    int ResetInterval;
+    QTimer *ResetTimer;
+    QTimer *StartTimer;
+
+    void PaintBox();
 
 protected:
-    void paintEvent(QPaintEvent *event) override;
-    void mousePressEvent(QMouseEvent *event) override;
-    void keyPressEvent(QKeyEvent *event)  override;
     void closeEvent(QCloseEvent *event) override;
+    void keyPressEvent(QKeyEvent *event)  override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void paintEvent(QPaintEvent *event) override;
 };