QGLColormap example was invalid

QGLColormap example missed int argc and char *argv[] from
main - method. Filling the QGLColormap with for - loop
was not working because of the 0 - size. Added arguments
to main - method and changed the filling so that
for-loop uses size of 256.

Task-number: QTBUG-3563

Merge-request: 2698
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/doc/src/snippets/code/src_opengl_qglcolormap.cpp b/doc/src/snippets/code/src_opengl_qglcolormap.cpp
index 3bd780b..535777d 100644
--- a/doc/src/snippets/code/src_opengl_qglcolormap.cpp
+++ b/doc/src/snippets/code/src_opengl_qglcolormap.cpp
@@ -42,7 +42,7 @@
 #include <QApplication>
 #include <QGLColormap>
 
-int main()
+int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
 
@@ -51,7 +51,8 @@ int main()
 
     // This will fill the colormap with colors ranging from
     // black to white.
-    for (int i = 0; i < colormap.size(); i++)
+    const int size = 256;
+    for (int i = 0; i < size; ++i)
         colormap.setEntry(i, qRgb(i, i, i));
 
     widget.setColormap(colormap);