Qyoto
4.0.5
Qyoto is a C# language binding for Qt
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The QGLColormap class is used for installing custom colormaps into a QGLWidget. More...
Public Member Functions | |
QGLColormap () | |
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QGLColormap (QGLColormap arg1) | |
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virtual void | CreateProxy () |
new void | Detach () |
new QColor | EntryColor (int idx) |
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new uint | EntryRgb (int idx) |
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new int | Find (uint color) |
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new int | FindNearest (uint color) |
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new bool | IsEmpty () |
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new void | SetEntries (int count, ref uint colors, int @base=0) |
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new void | SetEntry (int idx, QColor color) |
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new void | SetEntry (int idx, uint color) |
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new int | Size () |
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new void | Dispose () |
Protected Member Functions | |
QGLColormap (System.Type dummy) | |
Protected Attributes | |
SmokeInvocation | interceptor |
Properties | |
virtual System.IntPtr | SmokeObject [get, set] |
The QGLColormap class is used for installing custom colormaps into a QGLWidget.
QGLColormap provides a platform independent way of specifying and installing indexed colormaps for a QGLWidget. QGLColormap is especially useful when using the OpenGL color-index mode.
Under X11 you must use an X server that supports either a PseudoColor or DirectColor visual class. If your X server currently only provides a GrayScale, TrueColor, StaticColor or StaticGray visual, you will not be able to allocate colorcells for writing. If this is the case, try setting your X server to 8 bit mode. It should then provide you with at least a PseudoColor visual. Note that you may experience colormap flashing if your X server is running in 8 bit mode.
The size() of the colormap is always set to 256 colors. Note that under Windows you can also install colormaps in child widgets.
This class uses implicit sharing as a memory and speed optimization.
Example of use:
#include <QApplication>
#include <QGLColormap>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MySuperGLWidget widget; // a QGLWidget in color-index mode
QGLColormap colormap;
// This will fill the colormap with colors ranging from
// black to white.
const int size = 256;
for (int i = 0; i < size; ++i)
colormap.setEntry(i, qRgb(i, i, i));
widget.setColormap(colormap);
widget.show();
return app.exec();
}
See also QGLWidget::setColormap() and QGLWidget::colormap().
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protected |
QtOpenGL.QGLColormap.QGLColormap | ( | ) |
Construct a QGLColormap.
QtOpenGL.QGLColormap.QGLColormap | ( | QGLColormap | arg1 | ) |
Construct a shallow copy of map.
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virtual |
new void QtOpenGL.QGLColormap.Detach | ( | ) |
new void QtOpenGL.QGLColormap.Dispose | ( | ) |
new QColor QtOpenGL.QGLColormap.EntryColor | ( | int | idx | ) |
Returns the QRgb value in the colorcell with index idx.
new uint QtOpenGL.QGLColormap.EntryRgb | ( | int | idx | ) |
Returns the QRgb value in the colorcell with index idx.
new int QtOpenGL.QGLColormap.Find | ( | uint | color | ) |
Returns the index of the color color. If color is not in the map, -1 is returned.
new int QtOpenGL.QGLColormap.FindNearest | ( | uint | color | ) |
Returns the index of the color that is the closest match to color color.
new bool QtOpenGL.QGLColormap.IsEmpty | ( | ) |
Returns true if the colormap is empty or it is not in use by a QGLWidget; otherwise returns false.
A colormap with no color values set is considered to be empty. For historical reasons, a colormap that has color values set but which is not in use by a QGLWidget is also considered empty.
Compare size() with zero to determine if the colormap is empty regardless of whether it is in use by a QGLWidget or not.
See also size().
new void QtOpenGL.QGLColormap.SetEntries | ( | int | count, |
ref uint | colors, | ||
int @ | base = 0 |
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Set an array of cells in this colormap. count is the number of colors that should be set, colors is the array of colors, and base is the starting index. The first element in colors is set at base in the colormap.
new void QtOpenGL.QGLColormap.SetEntry | ( | int | idx, |
QColor | color | ||
) |
This is an overloaded function.
Set the cell with index idx in the colormap to color color.
new void QtOpenGL.QGLColormap.SetEntry | ( | int | idx, |
uint | color | ||
) |
Set cell at index idx in the colormap to color color.
new int QtOpenGL.QGLColormap.Size | ( | ) |
Returns the number of colorcells in the colormap.
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protected |
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getset |