Qt-fortran questions

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1

QVector4D,QVector3D, QPoint are not exposed in qt-fortran.

2

I just had Claude add it:

Run pixi run example geometry to see an example:

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image2024×1200 160 KB

New API from the geometry updates

Overloads are listed by the name you call: for example, painter%drawLine(p1, p2).

New value types (pure Fortran, use qt)

All have public components, structure constructors and Qt’s methods.

Integer and floating-point 2D (qt_geometry)

Type Components Extra constructors Methods
QPoint x, y isNull, manhattanLength, transposed, toPointF
QPointF x, y QPointF(QPoint) isNull, manhattanLength, transposed, toPoint
QSize width, height isNull, isEmpty, isValid, transposed, expandedTo, boundedTo, scaled(size [, mode]), grownBy, shrunkBy, toSizeF
QSizeF width, height QSizeF(QSize) isNull, isEmpty, isValid, transposed, expandedTo, boundedTo, scaled, toSize
QMargins left, top, right, bottom isNull
QRect x, y, width, height QRect(topLeft, size), QRect(topLeft, bottomRight) left, top, right, bottom, topLeft, topRight, bottomLeft, bottomRight, center, size, isNull, isEmpty, isValid, normalized, contains(point or rect [, proper]), intersects, intersected, united, translated(dx, dy or point), adjusted, marginsAdded, marginsRemoved, moveTo, moveCenter, toRectF
QRectF x, y, width, height QRectF(topLeft, size), QRectF(topLeft, bottomRight), QRectF(QRect) same as QRect without the margins methods, plus toRect and toAlignedRect
QLineF x1, y1, x2, y2 QLineF(p1, p2) p1, p2, dx, dy, isNull, length, setLength, angle, setAngle, angleTo, center, pointAt, unitVector, normalVector, intersects(line [, point]), translated
  • Free functions: QPointF_dotProduct, QLineF_fromPolar
  • Constants: QLineF_NoIntersection, QLineF_BoundedIntersection, QLineF_UnboundedIntersection, Qt_IgnoreAspectRatio, Qt_KeepAspectRatio, Qt_KeepAspectRatioByExpanding
  • Operators:
    • + and - (including unary minus) for points, sizes and margins; rect + margins and rect - margins
    • * and / by a number; for the integer types * also takes an integer, and results are rounded as Qt does
    • == and /=

Vectors and quaternions (qt_vectors)

Type Components Extra constructors Methods
QVector2D x, y QVector2D(array), QVector2D(QPoint), QVector2D(QPointF) isNull, length, lengthSquared, normalized, normalize, distanceToPoint, distanceToLine, toVector3D([z]), toVector4D, toPoint, toPointF, toArray
QVector3D x, y, z QVector3D(array), QVector3D(vector2d [, z]) same as QVector2D, plus distanceToPlane(point, normal) or distanceToPlane(p1, p2, p3), toVector2D, toVector4D([w])
QVector4D x, y, z, w QVector4D(array), QVector4D(vector3d [, w]), QVector4D(vector2d [, z, w]) isNull, length, lengthSquared, normalized, normalize, toVector2D, toVector2DAffine, toVector3D, toVector3DAffine, toPoint, toPointF, toArray
QQuaternion scalar, x, y, z (identity by default) QQuaternion(scalar, vector3d), QQuaternion(vector4d) isNull, isIdentity, vector, length, lengthSquared, normalized, normalize, conjugated, inverted, rotatedVector, getAxisAndAngle, toEulerAngles, toRotationMatrix, toVector4D
  • Free functions:
    • QVector2D_dotProduct, QVector3D_dotProduct, QVector3D_crossProduct, QVector3D_normal(v1, v2) or QVector3D_normal(v1, v2, v3), QVector4D_dotProduct
    • QQuaternion_dotProduct, QQuaternion_fromAxisAndAngle(axis, angle) or (x, y, z, angle), QQuaternion_fromEulerAngles(pitch, yaw, roll) or (vector3d)
    • QQuaternion_fromRotationMatrix, QQuaternion_fromAxes, QQuaternion_fromDirection, QQuaternion_rotationTo, QQuaternion_slerp, QQuaternion_nlerp
  • Operators:
    • + and -
    • * and / by a number, or component-wise with another vector
    • quaternion * quaternion (composes rotations), and quaternion * QVector3D (rotates the vector)
    • == and /= (to within a relative 1e-12)

QMatrix4x4 additions

  • New overloads: translate(QVector3D), scale(QVector3D), rotate(angle, QVector3D), rotate(QQuaternion), lookAt(eye, center, up) with QVector3Ds
  • map(QVector3D) and map(QVector4D)
  • mapVector(v(3) or QVector3D) is new: it applies the 3x3 part only, with no translation
  • Operators: matrix * QVector4D, matrix * QVector3D
  • Free functions: QVector3D_project(obj, modelView, projection, viewport) and QVector3D_unproject(win, modelView, projection, viewport)

New methods on existing classes

QWidget, inherited by every widget:

  • Getters:
    • pos() → QPoint, size() → QSize
    • geometry(), frameGeometry(), rect(), contentsRect() → QRect
    • sizeHint(), minimumSize(), maximumSize() → QSize
    • contentsMargins() → QMargins
  • New setter: setGeometry(QRect)
  • New overloads of existing setters: move(QPoint), resize(QSize), setMinimumSize(QSize), setMaximumSize(QSize), setFixedSize(QSize), setContentsMargins(QMargins)
  • Mapping: mapToGlobal, mapFromGlobal, mapToParent, mapFromParent (all QPoint → QPoint); mapTo(ancestor, QPoint), mapFrom(ancestor, QPoint)
  • childAt(QPoint) → QWidget

QLayout: contentsMargins() → QMargins, setContentsMargins(QMargins)

QMenu: popup(QPoint), exec(QPoint) → QAction

QtfPaintCell: rect() → QRect

QPainter:

  • drawPoint(QPointF)
  • drawLine(p1, p2) and drawLine(QLineF)
  • drawRect(QRectF)
  • drawEllipse(QRectF) and drawEllipse(center, rx, ry)
  • drawText(QPointF, text) and drawText(QRectF, flags, text)
  • fillRect(QRectF, color), setClipRect(QRectF)

QPainterPath:

  • moveTo(QPointF), lineTo(QPointF), addRect(QRectF), addEllipse(QRectF), containsPoint(QPointF)
  • currentPosition() → QPointF, pointAtPercent(t) → QPointF, boundingRect() → QRectF

QTransform: map(QPointF) → QPointF, mapRect(QRectF) → QRectF

QFontMetrics: boundingRect(text) → QRect, size(flags, text) → QSize

QImage, QPixmap: size() → QSize

QWindow:

  • size() → QSize, resize(QSize)
  • position() → QPoint, setPosition(QPoint)
  • geometry() → QRect, setGeometry(QRect)
  • mapToGlobal(QPoint), mapFromGlobal(QPoint)

QScreen: geometry(), availableGeometry() → QRect; size() → QSize; physicalSize() → QSizeF

QDrag: setHotSpot(QPoint)

Events:

  • QMouseEvent: position(), globalPosition() → QPointF
  • QWheelEvent: position() → QPointF, angleDelta(), pixelDelta() → QPoint
  • QResizeEvent: size(), oldSize() → QSize
  • QContextMenuEvent: pos(), globalPos() → QPoint
  • QDropEvent: position() → QPointF

QOpenGLShaderProgram: setUniformValue(name, x, y) (vec2), and setUniformValue(name, QVector2D, QVector3D or QVector4D)

Free function: QCursor_pos() → QPoint

All the existing scalar versions (move(x, y), drawLine(x1, y1, x2, y2), mapX/mapY, and so on) are unchanged.