public static void DrawSpinner(ImGuiController controller, int count, uint colour)
{
if (controller._fontTexture is null)
{
return;
}
ImFontGlyphPtr glyph = controller.UnicodeFont.FindGlyph(ImGuiController.FA_ICON_ROTATION);
ImGui.PushStyleVar(ImGuiStyleVar.FramePadding, Vector2.Zero);
IntPtr CPUframeBufferTextureId = controller.GetOrCreateImGuiBinding(controller.GraphicsDevice.ResourceFactory, controller._fontTexture, "Spinner");
ImGui.SetCursorPos(ImGui.GetCursorPos() + new Vector2(3, 3));
Vector2 size = new Vector2(18, 18);
Vector2 corner = ImGui.GetCursorScreenPos() + new Vector2(0, size.Y);
Vector2 center = corner + new Vector2(size.X * 0.5f, size.Y * -0.5f);
float rotation = -1 * ((float)DateTime.Now.TimeOfDay.TotalMilliseconds / 360);
float cos_a = (float)Math.Cos(rotation);
float sin_a = (float)Math.Sin(rotation);
Vector2[] pos = new Vector2[]
{
center + ImRotate(new Vector2(-size.X, -size.Y) * 0.5f, cos_a, sin_a),
center + ImRotate(new Vector2(+size.X, -size.Y) * 0.5f, cos_a, sin_a),
center + ImRotate(new Vector2(+size.X, +size.Y) * 0.5f, cos_a, sin_a),
center + ImRotate(new Vector2(-size.X, +size.Y) * 0.5f, cos_a, sin_a)
};
ImGui.GetWindowDrawList().AddImageQuad(CPUframeBufferTextureId, pos[0], pos[1], pos[2], pos[3],
new Vector2(glyph.U0, glyph.V0), new Vector2(glyph.U1, glyph.V0), new Vector2(glyph.U1, glyph.V1), new Vector2(glyph.U0, glyph.V1), colour);
if (count > 1)
{
ImGui.SetCursorPos(ImGui.GetCursorPos() + new Vector2(size.X, 4));
ImGui.Text($"{count}");
ImGui.SetCursorPosY(ImGui.GetCursorPosY() - size.Y);
ImGui.InvisibleButton($"#invisBtn{rotation}", new Vector2(18, 18));
}
else
{
//tooltip hover target
ImGui.InvisibleButton($"#invisBtn{rotation}", new Vector2(18, 24));
}
ImGui.PopStyleVar();
}
public void OnGUI()
{
var fonts = ImGui.GetIO().Fonts.Fonts;
for (var i = 0; i < fonts.Size; i++)
{
var font = fonts[i];
ImGui.PushFont(font);//临时换字体
ImFontGlyphPtr fontGlyphPtr = font.FindGlyphNoFallback('中');
unsafe
{
if (fontGlyphPtr.NativePtr != null)
{
ImGui.Text("这是一个中文 \"关于\" 窗口。");
}
else
{
ImGui.Text("this is a english \"about\" window.");
}
}
ImGui.PopFont();
}
}
public unsafe IconFont(GraphicsDevice device, Action <ImFontAtlasPtr> addFontToAtlas)
{
var atlas = new ImFontAtlasPtr(ImGuiNative.ImFontAtlas_ImFontAtlas());
addFontToAtlas(atlas);
atlas.Flags = ImFontAtlasFlags.NoMouseCursors;
if (!atlas.Build())
{
throw new InvalidProgramException("Building ImFontAtlas failed");
}
if (atlas.Fonts.Size != 1)
{
throw new InvalidProgramException("ImFontAtlas does not contain a font after building");
}
var font = *(ImFont **)atlas.Fonts.Data.ToPointer();
if (font->Glyphs.Size <= 0)
{
throw new InvalidProgramException("ImFont does not contain at least one glyph after building");
}
IntPtr texPixels;
int texWidth, texHeight;
atlas.GetTexDataAsAlpha8(out texPixels, out texWidth, out texHeight);
Texture = device.ResourceFactory.CreateTexture(new TextureDescription(
width: (uint)texWidth,
height: (uint)texHeight,
format: PixelFormat.R8_UNorm,
usage: TextureUsage.Sampled,
type: TextureType.Texture2D,
depth: 1,
mipLevels: 1,
arrayLayers: 1));
Texture.Name = "IconFontTexture";
device.UpdateTexture(Texture, texPixels, (uint)(texWidth * texHeight * 1), 0, 0, 0, (uint)texWidth, (uint)texHeight, 1, 0, 0);
var glyphsPtr = (ImFontGlyph *)font->Glyphs.Data.ToPointer();
var glyphs = new Dictionary <string, Rect>();
for (int i = 0; i < font->Glyphs.Size; i++)
{
var glyph = new ImFontGlyphPtr(glyphsPtr + i);
var uvMin = new Vector2(glyph.U0, glyph.V1); // switch v to prevent vflip
var uvMax = new Vector2(glyph.U1, glyph.V0);
var codepoint = (int)(glyph.Codepoint);
glyphs[char.ConvertFromUtf32(codepoint)] = new Rect((uvMin + uvMax) / 2, uvMax - uvMin);
}
Glyphs = glyphs;
atlas.Destroy();
Sampler = device.ResourceFactory.CreateSampler(new SamplerDescription(
addressModeU: SamplerAddressMode.Border,
addressModeV: SamplerAddressMode.Border,
addressModeW: SamplerAddressMode.Border,
filter: SamplerFilter.MinLinear_MagLinear_MipLinear,
comparisonKind: null,
maximumAnisotropy: 0,
minimumLod: 0,
maximumLod: 1,
lodBias: 0,
borderColor: SamplerBorderColor.TransparentBlack
));
}
