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module pangocairo;
import gio.Application : GioApplication = Application;
import gtk.Application;
import gtk.ApplicationWindow;
import gtk.DrawingArea;
import gtk.Widget;
import cairo.Context;
import cairo.ImageSurface;
import pango.PgCairo;
import pango.PgLayout;
import pango.PgFontDescription;
import std.stdio;
import std.math;
class PangoText : DrawingArea
{
int m_radius = 150;
int m_nWords = 10;
string m_font = "Sans Bold 27";
public this()
{
addOnDraw(&drawText);
}
public bool drawText (Scoped!Context cr, Widget widget)
{
PgLayout layout;
PgFontDescription desc;
// Center coordinates on the middle of the region we are drawing
cr.translate(m_radius, m_radius);
// Create a PangoLayout, set the font and text
layout = PgCairo.createLayout(cr);
layout.setText("Text");
desc = PgFontDescription.fromString(m_font);
layout.setFontDescription(desc);
desc.free();
// Draw the layout m_nWords times in a circle
for (int i = 0; i < m_nWords; i++)
{
int width, height;
double angle = (360. * i) / m_nWords;
double red;
cr.save();
/* Gradient from red at angle == 60 to blue at angle == 240 */
red = (1 + cos ((angle - 60) * PI / 180.)) / 2;
cr.setSourceRgb(red, 0, 1.0 - red);
cr.rotate(angle * PI / 180.);
/* Inform Pango to re-layout the text with the new transformation */
PgCairo.updateLayout(cr, layout);
layout.getSize(width, height);
cr.moveTo( -(cast(double)width / PANGO_SCALE) / 2, - m_radius );
PgCairo.showLayout(cr, layout);
cr.restore();
}
return true;
}
}
int main(string[] args)
{
Application application;
void activatePangoText(GioApplication app)
{
auto window = new ApplicationWindow(application);
window.setTitle("gtkD Pango text");
window.setDefaultSize(300, 300);
auto pt = new PangoText();
window.add(pt);
pt.show();
window.showAll();
}
application = new Application("org.gtkd.demo.pangocairo", GApplicationFlags.FLAGS_NONE);
application.addOnActivate(&activatePangoText);
return application.run(args);
}
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