static void Main()
{
Window.CreateWindow("OpenGL UI: Example 3", 1280, 720);
// add a reshape callback to update the UI
Window.OnReshapeCallbacks.Add(() => OpenGL.UI.UserInterface.OnResize(Window.Width, Window.Height));
// add a close callback to make sure we dispose of everything properly
Window.OnCloseCallbacks.Add(OnClose);
// enable depth testing to ensure correct z-ordering of our fragments
Gl.Enable(EnableCap.DepthTest);
Gl.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// initialize the user interface
OpenGL.UI.UserInterface.InitUI(Window.Width, Window.Height);
// create some centered text
OpenGL.UI.Text selectText = new OpenGL.UI.Text(OpenGL.UI.Text.FontSize._16pt, "Pick A Color:", OpenGL.UI.BMFont.Justification.Center);
selectText.Position = new Point(0, 80);
selectText.RelativeTo = OpenGL.UI.Corner.Center;
// add the two text object to the UI
OpenGL.UI.UserInterface.AddElement(selectText);
// create the color picker itself
OpenGL.UI.ColorGradient gradient = new OpenGL.UI.ColorGradient();
gradient.RelativeTo = OpenGL.UI.Corner.Center;
gradient.Position = new Point(-20, 0);
gradient.OnColorChange = (sender, e) => selectText.Color = gradient.Color;
// and create a hue slider that can control the types of colors shown in the color picker
OpenGL.UI.HueGradient hue = new OpenGL.UI.HueGradient();
hue.RelativeTo = OpenGL.UI.Corner.Center;
hue.Position = new Point(80, 0);
// add the color picker and its hue slider to the UI
OpenGL.UI.UserInterface.AddElement(gradient);
OpenGL.UI.UserInterface.AddElement(hue);
// subscribe the escape event using the OpenGL.UI class library
Input.Subscribe((char)27, Window.OnClose);
// make sure to set up mouse event handlers for the window
Window.OnMouseCallbacks.Add(OpenGL.UI.UserInterface.OnMouseClick);
Window.OnMouseMoveCallbacks.Add(OpenGL.UI.UserInterface.OnMouseMove);
while (true)
{
Window.HandleEvents();
OnRenderFrame();
}
}
static void Main()
{
Window.CreateWindow("OpenGL UI: Example 4", 1280, 720);
// add a reshape callback to update the UI
Window.OnReshapeCallbacks.Add(() => OpenGL.UI.UserInterface.OnResize(Window.Width, Window.Height));
// add a close callback to make sure we dispose of everything properly
Window.OnCloseCallbacks.Add(OnClose);
// enable depth testing to ensure correct z-ordering of our fragments
Gl.Enable(EnableCap.DepthTest);
Gl.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// initialize the user interface
OpenGL.UI.UserInterface.InitUI(Window.Width, Window.Height);
// create a container that will store all of our color picker content
OpenGL.UI.UIContainer colorPickerContainer = new OpenGL.UI.UIContainer();
colorPickerContainer.Size = new Point(240, 190);
colorPickerContainer.Position = new Point(20, 20);
colorPickerContainer.RelativeTo = OpenGL.UI.Corner.TopLeft;
// create a menu bar that will have two different textures
menuTexture = new Texture("data/menu.png");
menuSelectedTexture = new Texture("data/menuSelected.png");
OpenGL.UI.Button menu = new OpenGL.UI.Button(menuTexture);
colorPickerContainer.AddElement(menu);
// place some text within the menu bar
OpenGL.UI.Text menuText = new OpenGL.UI.Text(OpenGL.UI.Text.FontSize._12pt, "Color Picker");
menuText.RelativeTo = OpenGL.UI.Corner.TopLeft;
menuText.Position = new Point(4, 17);
colorPickerContainer.AddElement(menuText);
// add some events that will move the entire color picker container with the menu bar
bool moving = false;
menu.OnMouseDown = (sender, e) =>
{
moving = true;
menu.BackgroundTexture = menuSelectedTexture; // make it look nice by swapping the menubar texture
};
menu.OnMouseUp = (sender, e) =>
{
moving = false;
menu.BackgroundTexture = menuTexture; // make sure to restore the menubar texture
};
menu.OnMouseMove = (sender, e) =>
{
if (moving)
{
int x = colorPickerContainer.Position.X + OpenGL.UI.UserInterface.MousePosition.X - OpenGL.UI.UserInterface.LastMousePosition.X;
int y = colorPickerContainer.Position.Y + OpenGL.UI.UserInterface.MousePosition.Y - OpenGL.UI.UserInterface.LastMousePosition.Y;
colorPickerContainer.Position = new Point(x, y);
colorPickerContainer.OnResize();
}
};
// create the color picker itself
OpenGL.UI.ColorGradient gradient = new OpenGL.UI.ColorGradient();
gradient.Position = new Point(30, 30);
// and create a hue slider that can control the types of colors shown in the color picker
OpenGL.UI.HueGradient hue = new OpenGL.UI.HueGradient();
hue.Position = new Point(190, 30);
// add the color picker and its hue slider to the UI
colorPickerContainer.AddElement(gradient);
colorPickerContainer.AddElement(hue);
// add the entire container to the user interface
OpenGL.UI.UserInterface.AddElement(colorPickerContainer);
// subscribe the escape event using the OpenGL.UI class library
Input.Subscribe((char)27, Window.OnClose);
// make sure to set up mouse event handlers for the window
Window.OnMouseCallbacks.Add(OpenGL.UI.UserInterface.OnMouseClick);
Window.OnMouseMoveCallbacks.Add(OpenGL.UI.UserInterface.OnMouseMove);
while (true)
{
Window.HandleEvents();
OnRenderFrame();
}
}