diff options
Diffstat (limited to 'lib/tqwtplot3d/src/qwt3d_label.cpp')
| -rw-r--r-- | lib/tqwtplot3d/src/qwt3d_label.cpp | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/lib/tqwtplot3d/src/qwt3d_label.cpp b/lib/tqwtplot3d/src/qwt3d_label.cpp new file mode 100644 index 0000000..eb8b8c0 --- /dev/null +++ b/lib/tqwtplot3d/src/qwt3d_label.cpp @@ -0,0 +1,262 @@ +#include <qbitmap.h>
+#include "qwt3d_label.h"
+
+using namespace Qwt3D;
+
+bool Label::devicefonts_ = false;
+
+Label::Label()
+{
+ init();
+}
+
+Label::Label(const QString & family, int pointSize, int weight, bool italic)
+{
+ init(family, pointSize, weight, italic);
+}
+
+
+void Label::init(const QString & family, int pointSize, int weight, bool italic)
+{
+ init();
+ font_ = QFont(family, pointSize, weight, italic );
+}
+
+void Label::init()
+{
+ beg_ = Triple(0.0, 0.0, 0.0);
+ end_ = beg_;
+ pos_ = beg_;
+ setColor(0,0,0);
+ pm_ = QPixmap(0, 0);
+ font_ = QFont();
+ anchor_ = BottomLeft;
+ gap_ = 0;
+ flagforupdate_ = true;
+}
+
+void Label::useDeviceFonts(bool val)
+{
+ devicefonts_ = val;
+}
+
+void Label::setFont(const QString & family, int pointSize, int weight, bool italic)
+{
+ font_ = QFont(family, pointSize, weight, italic );
+ flagforupdate_ = true;
+}
+
+void Label::setString(QString const& s)
+{
+ text_ = s;
+ flagforupdate_ = true;
+}
+
+void Label::setColor(double r, double g, double b, double a)
+{
+ Drawable::setColor(r,g,b,a);
+ flagforupdate_ = true;
+}
+
+void Label::setColor(Qwt3D::RGBA rgba)
+{
+ Drawable::setColor(rgba);
+ flagforupdate_ = true;
+}
+
+/**
+example:
+
+\verbatim
+
+ Anchor TopCenter (*) resp. BottomRight(X)
+
+ +----*----+
+ | Pixmap |
+ +---------X
+
+\endverbatim
+*/
+void Label::setPosition(Triple pos, ANCHOR a)
+{
+ anchor_ = a;
+ pos_ = pos;
+}
+
+void Label::setRelPosition(Tuple rpos, ANCHOR a)
+{
+ double ot = 0.99;
+
+ getMatrices(modelMatrix, projMatrix, viewport);
+ beg_ = relativePosition(Triple(rpos.x, rpos.y, ot));
+ setPosition(beg_, a);
+}
+
+void Label::update()
+{
+ QPainter p;
+ QFontMetrics fm(font_);
+
+ QFontInfo info(font_);
+
+ QRect r = QRect(QPoint(0,0),fm.size(Qwt3D::SingleLine, text_));//fm.boundingRect(text_) misbehaviour under linux;
+
+#if QT_VERSION < 0x040000
+ r.moveBy(0, -r.top());
+#else
+ r.translate(0, -r.top());
+#endif
+
+ pm_ = QPixmap(r.width(), r.bottom());
+
+ if (pm_.isNull()) // else crash under linux
+ {
+ r = QRect(QPoint(0,0),fm.size(Qwt3D::SingleLine, QString(" "))); // draw empty space else //todo
+#if QT_VERSION < 0x040000
+ r.moveBy(0, -r.top());
+#else
+ r.translate(0, -r.top());
+#endif
+ pm_ = QPixmap(r.width(), r.bottom());
+ }
+
+ QBitmap bm(pm_.width(),pm_.height());
+ bm.fill(Qt::color0);
+ p.begin( &bm );
+ p.setPen(Qt::color1);
+ p.setFont(font_);
+ p.drawText(0,r.height() - fm.descent() -1 , text_);
+ p.end();
+
+ pm_.setMask(bm);
+
+ // avoids uninitialized areas in some cases
+#if QT_VERSION < 0x040000
+ pm_.fill();
+#endif
+ p.begin( &pm_ );
+ p.setFont( font_ );
+ p.setPen( Qt::SolidLine );
+ p.setPen( GL2Qt(color.r, color.g, color.b) );
+
+ p.drawText(0,r.height() - fm.descent() -1 , text_);
+ p.end();
+#if QT_VERSION < 0x040000
+ buf_ = pm_.convertToImage();
+#else
+ buf_ = pm_.toImage();
+#endif
+ tex_ = QGLWidget::convertToGLFormat( buf_ ); // flipped 32bit RGBA ?
+}
+
+/**
+Adds an additional shift to the anchor point. This happens in a more or less intelligent manner
+depending on the nature of the anchor:
+\verbatim
+anchor type shift
+
+left aligned -->
+right aligned <--
+top aligned top-down
+bottom aligned bottom-up
+\endverbatim
+The unit is user space dependend (one pixel on screen - play around to get satisfying results)
+*/
+void Label::adjust(int gap)
+{
+ gap_ = gap;
+}
+
+void Label::convert2screen()
+{
+ Triple start = World2ViewPort(pos_);
+
+ switch (anchor_)
+ {
+ case BottomLeft :
+ beg_ = pos_;
+ break;
+ case BottomRight:
+ beg_ = ViewPort2World(start - Triple(width() + gap_, 0, 0));
+ break;
+ case BottomCenter:
+ beg_ = ViewPort2World(start - Triple(width() / 2, -gap_, 0));
+ break;
+ case TopRight:
+ beg_ = ViewPort2World(start - Triple(width() + gap_, height(), 0));
+ break;
+ case TopLeft:
+ beg_ = ViewPort2World(start - Triple(-gap_, height(), 0));
+ break;
+ case TopCenter:
+ beg_ = ViewPort2World(start - Triple(width() / 2, height() + gap_, 0));
+ break;
+ case CenterLeft:
+ beg_ = ViewPort2World(start - Triple(-gap_, height() / 2, 0));
+ break;
+ case CenterRight:
+ beg_ = ViewPort2World(start - Triple(width() + gap_, height() / 2, 0));
+ break;
+ case Center:
+ beg_ = ViewPort2World(start - Triple(width() / 2, height() / 2, 0));
+ break;
+ default:
+ break;
+ }
+ start = World2ViewPort(beg_);
+ end_ = ViewPort2World(start + Triple(width(), height(), 0));
+}
+
+void Label::draw()
+{
+ if (flagforupdate_)
+ {
+ update();
+ flagforupdate_ = false;
+ }
+
+ if (buf_.isNull())
+ return;
+
+ GLboolean b;
+ GLint func;
+ GLdouble v;
+ glGetBooleanv(GL_ALPHA_TEST, &b);
+ glGetIntegerv(GL_ALPHA_TEST_FUNC, &func);
+ glGetDoublev(GL_ALPHA_TEST_REF, &v);
+
+ glEnable (GL_ALPHA_TEST);
+ glAlphaFunc (GL_NOTEQUAL, 0.0);
+
+ convert2screen();
+ glRasterPos3d(beg_.x, beg_.y, beg_.z);
+
+
+ int w = tex_.width();
+ int h = tex_.height();
+
+ if (devicefonts_)
+ {
+ drawDeviceText(QWT3DLOCAL8BIT(text_), "Courier", font_.pointSize(), pos_, color, anchor_, gap_);
+ }
+ else
+ {
+ drawDevicePixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, tex_.bits());
+// glDrawPixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, tex_.bits());
+ }
+
+
+ glAlphaFunc(func,v);
+ Enable(GL_ALPHA_TEST, b);
+}
+
+
+double Label::width() const
+{
+ return pm_.width();
+}
+
+double Label::height() const
+{
+ return pm_.height();
+}
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