Added ability to manipulate Text objects.

[architektonas] / src / painter.cpp

diff --git a/src/painter.cpp b/src/painter.cpp
index 5bd5ae412eb7681f78d133e7f170b4bb4e733da5..df1d7d5d1c548a6cfe8014300485362d6f02bce8 100644 (file)
--- a/src/painter.cpp
+++ b/src/painter.cpp
@@ -17,12 +17,6 @@
 #include "mathconstants.h"
 
 
-// Set class variable defaults
-//Vector Painter::origin(-10.0, -10.0);
-//double Painter::zoom = 1.0;
-//Vector Painter::screenSize(200.0, 200.0);
-
-
 Painter::Painter(QPainter * p/*= NULL*/): painter(p)
 {
 }
@@ -148,9 +142,9 @@ void Painter::DrawAngledText(Vector center, double angle, QString text, double s
        float yOffset = -12.0 * Global::zoom * size;
 
        // Fix text so it isn't upside down...
-       if ((angle > PI * 0.5) && (angle < PI * 1.5))
+       if ((angle > QTR_TAU) && (angle < THREE_QTR_TAU))
        {
-               angle += PI;
+               angle += HALF_TAU;
                yOffset = 12.0 * Global::zoom * size;
        }
 
@@ -189,8 +183,30 @@ void Painter::DrawTextObject(Point p, QString text, double size, double angle/*=
 }
 
 
+//
+// Return the non-rotated rectangle containing the extents of the text in
+// Cartesian coordiates (starting from <0, 0>, the lower left hand side)
+//
+Rect Painter::MeasureTextObject(QString text, double size)
+{
+       if (!painter)
+               return Rect();
+
+       painter->setFont(QFont("Arial", Global::zoom * size));
+       int textWidth = QFontMetrics(painter->font()).width(text);
+       int textHeight = QFontMetrics(painter->font()).height();
+       Point measured((double)textWidth / Global::zoom, (double)textHeight / Global::zoom);// = QtToCartesianCoords(Point(textWidth, textHeight));
+//printf("QFontMetrics w/h=%i/%i, measured=%lf/%lf\n", textWidth, textHeight, measured.x, measured.y);
+
+       return Rect(Point(0, 0), measured);
+}
+
+
 void Painter::DrawArc(Vector center, double radius, double startAngle, double span)
 {
+       if (!painter)
+               return;
+
        center = CartesianToQtCoords(center);
        // Need to multiply scalar quantities by the zoom factor as well...
        radius *= Global::zoom;
@@ -204,6 +220,9 @@ void Painter::DrawArc(Vector center, double radius, double startAngle, double sp
 
 void Painter::DrawEllipse(Vector center, double axis1, double axis2)
 {
+       if (!painter)
+               return;
+
        // Need to multiply scalar quantities by the zoom factor as well...
        center = CartesianToQtCoords(center);
        painter->drawEllipse(QPointF(center.x, center.y), axis1 * Global::zoom, axis2 * Global::zoom);
@@ -214,6 +233,9 @@ void Painter::DrawEllipse(Vector center, double axis1, double axis2)
 // we don't want our object handle size to depend on the zoom level!
 void Painter::DrawHandle(Vector center)
 {
+       if (!painter)
+               return;
+
        center = CartesianToQtCoords(center);
        painter->setPen(QPen(Qt::red, 2.0, Qt::DotLine));
        painter->setBrush(Qt::NoBrush);
@@ -221,16 +243,57 @@ void Painter::DrawHandle(Vector center)
 }
 
 
+// This function is for drawing feedback points without regard for zoom level;
+// we don't want our feedback point size to depend on the zoom level!
+void Painter::DrawCross(Vector point)
+{
+       if (!painter)
+               return;
+
+       point = CartesianToQtCoords(point);
+       painter->setPen(QPen(Qt::red, 2.0, Qt::SolidLine));
+       painter->drawLine(point.x - 8.0, point.y, point.x + 8.0, point.y);
+       painter->drawLine(point.x, point.y - 8.0, point.x, point.y + 8.0);
+}
+
+
+// This function is for drawing feedback points without regard for zoom level;
+// we don't want our feedback point size to depend on the zoom level!
+void Painter::DrawRectCorners(Rect rect)
+{
+       if (!painter)
+               return;
+
+       Vector v1 = CartesianToQtCoords(Vector(rect.l, rect.t));
+       Vector v2 = CartesianToQtCoords(Vector(rect.r, rect.b));
+       v1 += Vector(-8.0, -8.0);
+       v2 += Vector(+8.0, +8.0);
+       painter->setPen(QPen(Qt::red, 2.0, Qt::DashLine));
+       painter->drawLine(v1.x, v1.y, v1.x + 24, v1.y);
+       painter->drawLine(v1.x, v1.y, v1.x, v1.y + 24);
+       painter->drawLine(v2.x, v1.y, v2.x - 24, v1.y);
+       painter->drawLine(v2.x, v1.y, v2.x, v1.y + 24);
+       painter->drawLine(v2.x, v2.y, v2.x - 24, v2.y);
+       painter->drawLine(v2.x, v2.y, v2.x, v2.y - 24);
+       painter->drawLine(v1.x, v2.y, v1.x + 24, v2.y);
+       painter->drawLine(v1.x, v2.y, v1.x, v2.y - 24);
+       
+}
+
+
 // This function is for drawing object handles without regard for zoom level;
 // we don't want our object handle size to depend on the zoom level!
 void Painter::DrawArrowHandle(Vector center, double angle)
 {
+       if (!painter)
+               return;
+
        center = CartesianToQtCoords(center);
        QPolygonF arrow;
 
        // Since we're drawing directly on the screen, the Y is inverted. So we use
        // the mirror of the angle.
-       double orthoAngle = -angle + (PI / 2.0);
+       double orthoAngle = -angle + QTR_TAU;
        Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle));
        Vector unit = Vector(cos(-angle), sin(-angle));
 
@@ -251,12 +314,15 @@ void Painter::DrawArrowHandle(Vector center, double angle)
 // we don't want our object handle size to depend on the zoom level!
 void Painter::DrawArrowToLineHandle(Vector center, double angle)
 {
+       if (!painter)
+               return;
+
        DrawArrowHandle(center, angle);
        center = CartesianToQtCoords(center);
 
        // Since we're drawing directly on the screen, the Y is inverted. So we use
        // the mirror of the angle.
-       double orthoAngle = -angle + (PI / 2.0);
+       double orthoAngle = -angle + QTR_TAU;
        Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle));
        Vector unit = Vector(cos(-angle), sin(-angle));
 
@@ -355,7 +421,7 @@ void Painter::DrawArrowhead(Vector head, Vector tail, double size)
 
        // We draw the arrowhead aligned along the line from tail to head
        double angle = Vector(head - tail).Angle();
-       double orthoAngle = angle + (PI / 2.0);
+       double orthoAngle = angle + QTR_TAU;
        Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle));
        Vector unit = Vector(head - tail).Unit();
 
@@ -387,6 +453,9 @@ void Painter::DrawCrosshair(Vector point)
 
 void Painter::DrawInformativeText(QString text)
 {
+       if (!painter)
+               return;
+
        painter->setFont(*Global::font);
        QRectF bounds = painter->boundingRect(QRectF(), Qt::AlignVCenter, text);
        bounds.moveTo(17.0, 17.0);