private void updateEffect()
{
float r = 0;
float g = 0;
float b = 0;
int a = aSlider.Value;
if (checkBox1.Checked)
{
r = rSlider.Value / 255F;
g = gSlider.Value / 255F;
b = bSlider.Value / 255F;
}
else
{
r = rSlider.Value;
g = gSlider.Value;
b = bSlider.Value;
}
workspaceManager.PreviewColorShiftSelection(r, g, b, a, checkBox1.Checked);
}