X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Fpainter.cpp;fp=src%2Fpainter.cpp;h=16268e70b38535c9ca42090e9f6e17a9a11c4b8d;hb=7fde5a077bc9bbce28662fa2e5aa5043f3b4747f;hp=0000000000000000000000000000000000000000;hpb=0c01fa32c7e0629ae61992e0419f03724fc18487;p=ttedit diff --git a/src/painter.cpp b/src/painter.cpp new file mode 100644 index 0000000..16268e7 --- /dev/null +++ b/src/painter.cpp @@ -0,0 +1,490 @@ +// +// painter.cpp: Paint abstraction layer between Archtektonas and Qt +// +// Part of the Architektonas Project +// (C) 2011 Underground Software +// See the README and GPLv3 files for licensing and warranty information +// +// JLH = James Hammons +// +// WHO WHEN WHAT +// --- ---------- ------------------------------------------------------------ +// JLH 09/20/2011 Created this file +// + +#include "painter.h" +#include "global.h" +#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) +{ +} + + +Painter::~Painter() +{ +} + + +Vector Painter::CartesianToQtCoords(Vector v) +{ + // Convert regular Cartesian coordinates to the inverted Y-axis Qt + // coordinates at the current origin and zoom level. + return Vector((v.x - Global::origin.x) * Global::zoom, Global::screenSize.y - ((v.y - Global::origin.y) * Global::zoom)); +} + + +Vector Painter::QtToCartesianCoords(Vector v) +{ + // Convert screen location, with inverted Y-axis coordinates, to regular + // Cartesian coordinates at the current zoom level. + return Vector((v.x / Global::zoom) + Global::origin.x, ((Global::screenSize.y - v.y) / Global::zoom) + Global::origin.y); +/* +How to do it: + +e.g., we have a point on the screen at Qt coords of 10, 10, screenSize is 100, 100. +origin is -10, -10 and zoom level is 2 (200%) + +1st, invert the Y: 10, 10 -> 10, 90 +2nd, add origin: 10, 90 -> 0, 80 (no, not right--err, yes, it is) +3rd, aply zoom: 0, 80 -> 0, 40 + +or, is it: + +1st, invert the Y: 10, 10 -> 10, 90 +2nd, aply zoom: 10, 90 -> 5, 45 +3rd, add origin: 5, 45 -> -5, 35 + +it depends on whether or not origin is in Qt coords or cartesian. If Qt, then the 1st +is correct, otherwise, the 2nd is correct. + +The way we calculate the Cartesian to Qt shows the 2nd (origin is cartesian) to be correct. +*/ +} + + +void Painter::SetRenderHint(int hint) +{ + if (!painter) + return; + + painter->setRenderHint((QPainter::RenderHint)hint); +} + + +void Painter::SetPen(QPen pen) +{ + if (!painter) + return; + + painter->setPen(pen); +} + + +void Painter::SetPen(uint32_t color, float size/*= 0*/, int style/*= 0*/) +{ + if (!painter) + return; + + // We can cast style as Qt:PenStyle because they line up 1-to-1 + painter->setPen(QPen(QColor(color >> 16, (color >> 8) & 0xFF, color & 0xFF, 255), + size, (Qt::PenStyle)style)); +} + + +void Painter::SetBrush(QBrush brush) +{ + if (!painter) + return; + + painter->setBrush(brush); +} + + +void Painter::SetBrush(uint32_t color) +{ + if (!painter) + return; + + painter->setBrush(QBrush(QColor(color >> 16, (color >> 8) & 0xFF, color & 0xFF, 255))); +} + + +void Painter::SetFont(QFont font) +{ + if (!painter) + return; + + painter->setFont(font); +} + + +void Painter::DrawAngledText(Vector center, double angle, QString text, double size) +{ + if (!painter) + return; + + // Strategy: Since Qt doesn't have any rotated text drawing functions, + // we instead translate the origin to the center of the text to be drawn and + // then rotate the frame to the desired angle. + center = CartesianToQtCoords(center); + + // We may need this stuff... If dimension text is large enough. +// int textWidth = QFontMetrics(painter->font()).width(text); +// int textHeight = QFontMetrics(painter->font()).height(); + QRectF textBox(-100.0 * Global::zoom * size, -100.0 * Global::zoom * size, 200.0 * Global::zoom * size, 200.0 * Global::zoom * size); // x, y, w, h; x/y = upper left corner + + // This is in pixels. Might not render correctly at all zoom levels. + // Need to figure out if dimensions are always rendered at one size + // regardless of zoom, or if they have a definite size, and are thus + // zoomable. + float yOffset = -12.0 * Global::zoom * size; + + // Fix text so it isn't upside down... + if ((angle > PI * 0.5) && (angle < PI * 1.5)) + { + angle += PI; + yOffset = 12.0 * Global::zoom * size; + } + + textBox.translate(0, yOffset); + painter->save(); + painter->translate(center.x, center.y); + // Angles are backwards in the Qt coord system, so we flip ours... + painter->rotate(-angle * RADIANS_TO_DEGREES); +//Need to fix this so the text scales as well... + painter->drawText(textBox, Qt::AlignCenter, text); + painter->restore(); +} + + +// +// Draw angled text. Draws text using point p as the upper left corner. +// Size is point size, angle is in radians (defaults to 0). +// +void Painter::DrawTextObject(Point p, QString text, double size, double angle/*= 0*/) +{ + if (!painter) + return; + + p = CartesianToQtCoords(p); + painter->setFont(QFont("Arial", Global::zoom * size)); + int textWidth = QFontMetrics(painter->font()).width(text); + int textHeight = QFontMetrics(painter->font()).height(); + + QRectF textBox(0, 0, textWidth, textHeight); + painter->save(); + painter->translate(p.x, p.y); + // Angles are backwards in the Qt coord system, so we flip ours... + painter->rotate(-angle * RADIANS_TO_DEGREES); + painter->drawText(textBox, Qt::AlignLeft | Qt::AlignTop , text); + painter->restore(); +} + + +void Painter::DrawArc(Vector center, double radius, double startAngle, double span) +{ + center = CartesianToQtCoords(center); + // Need to multiply scalar quantities by the zoom factor as well... + radius *= Global::zoom; + QRectF rectangle(QPointF(center.x - radius, center.y - radius), + QPointF(center.x + radius, center.y + radius)); + int angle1 = (int)(startAngle * RADIANS_TO_DEGREES * 16.0); + int angle2 = (int)(span * RADIANS_TO_DEGREES * 16.0); + painter->drawArc(rectangle, angle1, angle2); +} + + +void Painter::DrawEllipse(Vector center, double axis1, double axis2) +{ + // 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); +} + + +// 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::DrawHandle(Vector center) +{ + center = CartesianToQtCoords(center); + painter->setPen(QPen(Qt::red, 2.0, Qt::DotLine)); + painter->setBrush(Qt::NoBrush); + painter->drawEllipse(QPointF(center.x, center.y), 4.0, 4.0); +} + + +// 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) +{ + 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); + Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle)); + Vector unit = Vector(cos(-angle), sin(-angle)); + + Point p0 = center + (unit * 6.0); + Point p1 = center + (unit * 21.0); + Point p1b = center + (unit * 11.0); + Point p2 = p1b + (orthogonal * 5.0); + Point p3 = p1b - (orthogonal * 5.0); + + painter->drawLine(p0.x, p0.y, p1.x, p1.y); + arrow << QPointF(p1.x, p1.y) << QPointF(p2.x, p2.y) << QPointF(p3.x, p3.y); + + painter->drawPolygon(arrow); +} + + +// 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::DrawArrowToLineHandle(Vector center, double angle) +{ + 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); + Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle)); + Vector unit = Vector(cos(-angle), sin(-angle)); + + Point p1 = center + (unit * 21.0); + Point p2 = p1 + (orthogonal * 7.0); + Point p3 = p1 - (orthogonal * 7.0); + + painter->drawLine(p2.x, p2.y, p3.x, p3.y); +} + + +void Painter::DrawLine(int x1, int y1, int x2, int y2) +{ + if (!painter) + return; + + Vector v1 = CartesianToQtCoords(Vector(x1, y1)); + Vector v2 = CartesianToQtCoords(Vector(x2, y2)); + painter->drawLine(v1.x, v1.y, v2.x, v2.y); +} + + +void Painter::DrawLine(Vector v1, Vector v2) +{ + if (!painter) + return; + + v1 = CartesianToQtCoords(v1); + v2 = CartesianToQtCoords(v2); + painter->drawLine(QPointF(v1.x, v1.y), QPointF(v2.x, v2.y)); +} + + +void Painter::DrawPoint(int x, int y) +{ + if (!painter) + return; + + Vector v = CartesianToQtCoords(Vector(x, y)); + painter->drawPoint(v.x, v.y); +} + + +// The rect passed in is in Qt coordinates... +void Painter::DrawRoundedRect(QRectF rect, double radiusX, double radiusY) +{ + if (!painter) + return; + + painter->drawRoundedRect(rect, radiusX, radiusY); +} + + +// The rect passed in is in Cartesian but we want to pad it by a set number of +// pixels (currently set at 8), so the pad looks the same regardless of zoom. +void Painter::DrawPaddedRect(QRectF rect) +{ + if (!painter) + return; + + Vector v1 = CartesianToQtCoords(Vector(rect.x(), rect.y())); + Vector v2 = CartesianToQtCoords(Vector(rect.right(), rect.bottom())); + QRectF screenRect(QPointF(v1.x, v1.y), QPointF(v2.x, v2.y)); + screenRect.adjust(-8, 8, 8, -8); // Left/top, right/bottom + painter->drawRect(screenRect); +} + + +void Painter::DrawRect(QRectF rect) +{ + if (!painter) + return; + + Vector v1 = CartesianToQtCoords(Vector(rect.x(), rect.y())); + Vector v2 = CartesianToQtCoords(Vector(rect.right(), rect.bottom())); + QRectF screenRect(QPointF(v1.x, v1.y), QPointF(v2.x, v2.y)); + painter->drawRect(screenRect); +} + + +void Painter::DrawText(QRectF rect, int type, QString text) +{ + if (!painter) + return; + + painter->drawText(rect, (Qt::AlignmentFlag)type, text); +} + + +void Painter::DrawArrowhead(Vector head, Vector tail, double size) +{ + if (!painter) + return; + + QPolygonF arrow; + + // We draw the arrowhead aligned along the line from tail to head + double angle = Vector(head - tail).Angle(); + double orthoAngle = angle + (PI / 2.0); + Vector orthogonal = Vector(cos(orthoAngle), sin(orthoAngle)); + Vector unit = Vector(head - tail).Unit(); + + Point p1 = head - (unit * 9.0 * size); + Point p2 = p1 + (orthogonal * 3.0 * size); + Point p3 = p1 - (orthogonal * 3.0 * size); + + Point p4 = CartesianToQtCoords(head); + Point p5 = CartesianToQtCoords(p2); + Point p6 = CartesianToQtCoords(p3); + + arrow << QPointF(p4.x, p4.y) << QPointF(p5.x, p5.y) << QPointF(p6.x, p6.y); + + painter->drawPolygon(arrow); +} + + +// Point is given in Cartesian coordinates +void Painter::DrawCrosshair(Vector point) +{ + if (!painter) + return; + + Vector screenPoint = CartesianToQtCoords(point); + painter->drawLine(0, screenPoint.y, Global::screenSize.x, screenPoint.y); + painter->drawLine(screenPoint.x, 0, screenPoint.x, Global::screenSize.y); +} + + +void Painter::DrawInformativeText(QString text) +{ + painter->setFont(*Global::font); + QRectF bounds = painter->boundingRect(QRectF(), Qt::AlignVCenter, text); + bounds.moveTo(17.0, 17.0); + QRectF textRect = bounds; + textRect.adjust(-7.0, -7.0, 7.0, 7.0); + + QPen pen = QPen(QColor(0x00, 0xFF, 0x00), 1.0, Qt::SolidLine); + painter->setPen(pen); + painter->setBrush(QBrush(QColor(0x40, 0xFF, 0x40, 0x9F))); + painter->drawRoundedRect(textRect, 7.0, 7.0); + + pen = QPen(QColor(0x00, 0x5F, 0xDF)); + painter->setPen(pen); + painter->drawText(bounds, Qt::AlignVCenter, text); +} + + +void Painter::DrawBezier(Point p1, Point p2, Point p3) +{ + p1 = CartesianToQtCoords(p1); + p2 = CartesianToQtCoords(p2); + p3 = CartesianToQtCoords(p3); + + QPainterPath path; + path.moveTo(p1.x, p1.y); + path.quadTo(p2.x, p2.y, p3.x, p3.y); + painter->drawPath(path); +} + + +void Painter::DrawBezier(IPoint p1, IPoint p2, IPoint p3) +{ + DrawBezier(Point(p1.x, p1.y), Point(p2.x, p2.y), Point(p3.x, p3.y)); +} + + +// +// Draw a sqaure dot (5x5, centered on Vector; non-scaled) +// +void Painter::DrawSquareDot(Vector v) +{ + QPoint pt[4]; + v = CartesianToQtCoords(v); + + pt[0] = QPoint(v.x - 2, v.y - 2); + pt[1] = QPoint(v.x + 2, v.y - 2); + pt[2] = QPoint(v.x + 2, v.y + 2); + pt[3] = QPoint(v.x - 2, v.y + 2); + + painter->drawPolygon(pt, 4); +} + + +// +// Draw a round dot (5x5, centered on Vector; non-scaled) +// +void Painter::DrawRoundDot(Vector v) +{ + QPoint pt[8]; + v = CartesianToQtCoords(v); + + pt[0] = QPoint(v.x - 1, v.y - 2); + pt[1] = QPoint(v.x + 1, v.y - 2); + pt[2] = QPoint(v.x + 2, v.y - 1); + pt[3] = QPoint(v.x + 2, v.y + 1); + pt[4] = QPoint(v.x + 1, v.y + 2); + pt[5] = QPoint(v.x - 1, v.y + 2); + pt[6] = QPoint(v.x - 2, v.y + 1); + pt[7] = QPoint(v.x - 2, v.y - 1); + + painter->drawPolygon(pt, 8); +} + + +// +// Draw a sqaure dot (nxn, centered on Vector; non-scaled) +// +void Painter::DrawSquareDotN(Vector v, uint32_t n) +{ + QPoint pt[4]; + uint32_t offset = (n - 1) / 2; + v = CartesianToQtCoords(v); + + pt[0] = QPoint(v.x - offset, v.y - offset); + pt[1] = QPoint(v.x + offset, v.y - offset); + pt[2] = QPoint(v.x + offset, v.y + offset); + pt[3] = QPoint(v.x - offset, v.y + offset); + + painter->drawPolygon(pt, 4); +} + + +// +// Draw a round dot (nxn, centered on Vector; non-scaled) +// +void Painter::DrawRoundDotN(Vector v, uint32_t n) +{ + int radius = (n / 2) + 1; + v = CartesianToQtCoords(v); + painter->drawEllipse(v.x - radius, v.y - radius, n, n); +}