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POC++ pango text orientation
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2013-10-01T06:18:44.063
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2013-10-01T08:51:34.340
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2013-10-01T06:26:18.800
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Body
I'm trying to label the y-axis in a plot built using pango. I'm unable to orient the text to run vertically up along the y-axis. Relevant portion of code is: <pre><code> #include <gtkmm.h> Pango::FontDescription font; cr->save(); // where cr is Glib::RefPtr<Cairo::Context> const & cr->set_source_rgba(1.0,1.0,1.0,0.5); font.set_family("Monospace"); font.set_style(Pango::STYLE_ITALIC); font.set_weight(Pango::WEIGHT_BOLD); font.set_absolute_size(20); Glib::RefPtr<Pango::Layout> x_axis_label = this->create_pango_layout("x-axis label"); x_axis_label->set_font_description(font); cr->move_to(0.38,0.465); x_axis_label->show_in_cairo_context(cr); // so far so good, renders as expected // now trying to render the y-axis label Glib::RefPtr<Pango::Context> t_y_axis_label_ctxt = x_axis_label->get_context(); Pango::Matrix p_matrix; // apply some transformation p_matrix.xx = 0.0; p_matrix.xy = 1.0; p_matrix.yx = 1.0; p_matrix.yy = 0.0; p_matrix.x0 = 0.0; p_matrix.y0 = 0.0; t_y_axis_label_ctxt->set_matrix(p_matrix); Glib::RefPtr<Pango::Layout> y_axis_label = Pango::Layout::create(t_y_axis_label_ctxt); y_axis_label->set_text("y-axis label"); // if this line of code is omitted I would expect, at least the text "x-axis label" to be rendered. But this does not happen. y_axis_label->set_font_description(font); cr->move_to(0.0,0.0); y_axis_label->show_in_cairo_context(cr); // renders no output cr->restore(); </code></pre> I suspect the problem has something to do with context that i retrieve from x-axis label, and the expected copy behaviour is not manifesting.
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<c++><gtk><cairo><gtkmm><pango>
Title
C++ pango text orientation
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1. PO
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1. USAditya Sihag
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1. USAditya Sihag
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