internal DrawTextCommand(string Text, LGuiVec2 Pos, LGuiColor Color, LGuiFont Font)
{
this.Text = Text;
this.Pos = Pos;
this.Color = Color;
this.Font = Font;
}
private static LGuiVec2 OnGetTextSize(string Text, LGuiFont GuiFont)
{
var Font = FontCache.GetOrCreate(GuiFont);
var Size = Device_.MeasureString(Text, Font, 0, GdiCommandExecutor.FontStringFormat);
return(new LGuiVec2(Size.Width, Font.Height));
}
private static void HandleMouseEvent(LGuiTextFieldState State, LGuiFont Font, LGuiVec2 RenderPos)
{
if (LGuiContext.IO.IsMouseClick(LGuiMouseButtons.Left))
{
var Pos = LGuiContext.IO.MousePos - RenderPos + new LGuiVec2(State.OffsetX * Font.FontWidth, State.OffsetY * Font.FontHeight);
if (State.SingleLine)
{
Pos.Y = 0;
}
var Cursor = LocateCoord(State, Font, Pos);
State.OnClick(Cursor);
}
else if (LGuiContext.IO.IsMouseDown(LGuiMouseButtons.Left) && LGuiContext.IO.IsMouseMove())
{
var Pos = LGuiContext.IO.MousePos - RenderPos + new LGuiVec2(State.OffsetX * Font.FontWidth, State.OffsetY * Font.FontHeight);
if (State.SingleLine)
{
Pos.Y = 0;
}
var Cursor = LocateCoord(State, Font, Pos);
State.OnDrag(Cursor);
}
}
internal static Font GetOrCreate(LGuiFont GuiFont)
{
var Hash = GuiFont.GetHashCode();
if (!FontCache_.ContainsKey(Hash))
{
FontCache_.Add(Hash, new Font(GuiFont.FontName, GuiFont.FontSize, GuiFont.Bold ? FontStyle.Bold : FontStyle.Regular));
}
return(FontCache_[Hash]);
}
private static int LayoutRow(LGuiTextFieldState State, LGuiFont Font, int StartIndex, ref LGuiVec2 TextSize)
{
var Index = StartIndex;
var LineWidth = 0.0f;
TextSize.X = 0;
TextSize.Y = 0;
while (Index < State.TextLength)
{
var Ch = State.GetCharacter(Index++);
if (Ch == '\n')
{
TextSize.X = LGuiMisc.Max(TextSize.X, LineWidth);
TextSize.Y = TextSize.Y + Font.FontHeight + State.Spacing.Y;
LineWidth = 0.0f;
break;
}
if (Ch == '\r')
{
continue;
}
LineWidth = LineWidth + Font.FontWidth + State.Spacing.X;
}
if (TextSize.X < LineWidth)
{
TextSize.X = LineWidth;
}
if (LineWidth > 0 || TextSize.Y == 0.0f)
{
TextSize.Y = TextSize.Y + Font.FontHeight + State.Spacing.Y;
}
return(Index - StartIndex);
}
public abstract void DrawText(string Text, LGuiVec2 Pos, LGuiColor Color, LGuiFont Font);
internal static void DrawText(string Text, LGuiVec2 Pos, LGuiColor Color, LGuiFont Font)
{
GetCurrentList().DrawText(Text, Pos, Color, Font);
}
public void DrawText(string Text, LGuiVec2 Pos, LGuiColor Color, LGuiFont Font)
{
var Cmd = new DrawTextCommand(Text, Pos, Color, Font);
AddCommand(Cmd);
}
public override void DrawText(string Text, LGuiVec2 Pos, LGuiColor Color, LGuiFont Font)
{
Device_.DrawString(Text, FontCache.GetOrCreate(Font), BrushCache.GetOrCreate(Color), Pos.X, Pos.Y, FontStringFormat);
}
private static int LocateCoord(LGuiTextFieldState State, LGuiFont Font, LGuiVec2 Pos)
{
var Length = State.TextLength;
var Index = 0;
var BaseY = 0.0f;
var Size = LGuiVec2.Zero;
var NumChars = 0;
while (Index < Length)
{
NumChars = LayoutRow(State, Font, Index, ref Size);
if (NumChars <= 0)
{
return(Length);
}
if (Index == 0 && Pos.Y < BaseY)
{
return(0);
}
if (Pos.Y < BaseY + Size.Y)
{
break;
}
Index += NumChars;
BaseY += Size.Y;
}
if (Index >= Length)
{
return(Length);
}
if (Pos.X < 0)
{
return(Index);
}
if (Pos.X < Size.X)
{
var PrevX = 0.0f;
for (var N = 0; N < NumChars; ++N)
{
var Width = Font.FontWidth + State.Spacing.X;
if (Pos.X < PrevX + Width)
{
if (Pos.X < PrevX + Width / 2.0f)
{
return(Index + N);
}
else
{
return(Index + N + 1);
}
}
PrevX += Width;
}
}
if (State.GetCharacter(Index + NumChars - 1) == '\n')
{
return(Index + NumChars - 1);
}
return(Index + NumChars);
}
