public void Start()
{
mathView = FindObjectOfType <MathView>();
for (int i = 0; i < inputSpots.Length; i++)
{
if (inputSpots[i] != null)
{
if (i == 0 || !restrictInputToInOrder)
{
inputSpots[i].AcceptingInput = true;
}
else
{
inputSpots[i].AcceptingInput = false;
}
}
}
//subscribe to all input template slot changed events
MatrixInputTemplate[] inputTemplates = GameObject.FindObjectsOfType <MatrixInputTemplate>();
foreach (MatrixInputTemplate inputTemplate in inputTemplates)
{
inputTemplate.inputSlotChanged += new MatrixInputTemplate.InputSlotChangedHandler(TemplateInputChangedHandler);
}
renderManager = GameObject.FindObjectOfType <MatrixRenderManager>();
}
public EditorView()
{
// Basic functionality
var view = new SKCanvasView {
HeightRequest = 225
};
var keyboard = new MathKeyboard(Rendering.FrontEnd.PainterConstants.LargerFontSize);
var viewModel = keyboard.Keyboard;
viewModel.BindDisplay(view, new SkiaSharp.MathPainter {
TextColor = SKColors.Black
}, new SKColor(0, 0, 0, 153));
// Input from physical keyboard
var entry = new Entry {
Placeholder = "Enter keystrokes...",
HorizontalOptions = LayoutOptions.FillAndExpand
};
entry.TextChanged += (sender, e) => {
entry.Text = "";
foreach (var c in e.NewTextValue)
{
// The (int) extra conversion seems to be required by Android or a crash occurs
viewModel.KeyPress((Editor.MathKeyboardInput)(int) c);
}
};
// Evaluation
var output = new MathView {
FontSize = 32, EnableTouchEvents = true, EnablePanning = true
};
keyboard.Keyboard.ReturnPressed += delegate {
output.LaTeX = Evaluation.Interpret(keyboard.Keyboard.MathList);
};
// Debug labels
var latex = new Label {
Text = "LaTeX = "
};
var atomTypes = new Label {
Text = "Atom Types = "
};
var ranges = new Label {
Text = "Ranges = "
};
var index = new Label {
Text = "Index = "
};
viewModel.RedrawRequested += (sender, e) => Device.BeginInvokeOnMainThread(() => {
latex.Text = "LaTeX = " + viewModel.LaTeX;
atomTypes.Text = "Atom Types = " + string.Join
(", ", viewModel.MathList.Select(x => x.GetType().Name));
ranges.Text = "Ranges = " + string.Join
(", ", (viewModel.Display ?? throw new Structures.InvalidCodePathException("Invalid LaTeX"))
.Displays.Select(x => x.Range));
index.Text = "Index = " + viewModel.InsertionIndex;
});
private void OprostqvaneNaKorena1(double gorenkoren)
{
var view5 = new MathView();
view5.FontSize = 55;
double inputNum = gorenkoren;
//Check if it is a perfect square number
if (!IsDecimal(Math.Sqrt(inputNum)))
{
lblOprastqvaneNaKornena.Text = "Опростяваме корена(В случея е точен):";
view5.LaTeX = @"\frac{S=" + Math.Sqrt(inputNum).ToString() + "}{" + DolenKoren(dolenkoren) + "}"; //mahame korena
OprostenoLice.Children.Add(view5);
return;
}
double testSquare = 0;
for (int i = (int)Math.Floor(Math.Sqrt(inputNum)); i >= 2; i--)
{
testSquare = inputNum / (double)(i * i);
if (!IsDecimal(testSquare))
{
lblOprastqvaneNaKornena.Text = "Опростяваме корена:";
view5.LaTeX = @"S=" + @"\frac{" + i.ToString() + @"\sqrt{" + (inputNum / (i * i)).ToString() + "}" + "}{" + DolenKoren(dolenkoren) + "}";
OprostenoLice.Children.Add(view5);
return;
}
}
lblOprastqvaneNaKornena.Text = "Опростяваме корена (В случея няма нужда):";
view5.LaTeX = @"S=" + @"\frac{" + @"\sqrt{" + inputNum.ToString() + "}" + "}{" + DolenKoren(dolenkoren) + "}";
OprostenoLice.Children.Add(view5);
}
private async void OptScale_Click(object sender, RoutedEventArgs e)
{
var ScaleItems = new ToggleMenuFlyoutItem[] {
optScale100,
optScale125, optScale133, optScale150,
optScale200, optScale250,
optScale300,
optScale400
};
foreach (var item in ScaleItems)
{
if (item == sender)
{
item.IsChecked = true;
var btnName = item.Name;
CURRENT_SCALE = int.Parse(btnName.Substring("optScale".Length));
var ret = await MathView.InvokeScriptAsync("ChangeScale", new string[] { $"{CURRENT_SCALE}" });
}
else
{
item.IsChecked = false;
}
}
Settings.Set("MathScale", CURRENT_SCALE);
}
private async Task <WriteableBitmap> GetMathCapture()
{
using (Windows.Storage.Streams.InMemoryRandomAccessStream rs = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
if (MathView.DefaultBackgroundColor.A == 0x00)
{
await MathView.InvokeScriptAsync("ChangeColor", new string[] { CURRENT_FGCOLOR.ToCssRGBA(), Colors.White.ToCssRGBA() });
}
await MathView.CapturePreviewToStreamAsync(rs);
await rs.FlushAsync();
var wb = await rs.ToWriteableBitmap();
if (wb is WriteableBitmap)
{
wb = wb.Crop(2);
}
if (MathView.DefaultBackgroundColor.A == 0x00)
{
await MathView.InvokeScriptAsync("ChangeColor", new string[] { CURRENT_FGCOLOR.ToCssRGBA(), CURRENT_BGCOLOR.ToCssRGBA() });
}
return(wb);
}
}
private async void OptColor_Click(object sender, RoutedEventArgs e)
{
var btn = sender as MenuFlyoutItem;
var C_NAME = btn.Name.Substring(3);
switch (C_NAME)
{
case "ResetColor":
CURRENT_BGCOLOR = Color.FromArgb(0, 255, 255, 255);
CURRENT_FGCOLOR = Colors.Black; // Color.FromArgb(255, 000, 000, 000);
MathView.DefaultBackgroundColor = CURRENT_BGCOLOR;
break;
case "BgColor":
CURRENT_BGCOLOR = await Utils.ShowColorDialog(CURRENT_BGCOLOR);
MathView.DefaultBackgroundColor = CURRENT_BGCOLOR;
break;
case "FgColor":
CURRENT_FGCOLOR = await Utils.ShowColorDialog(CURRENT_FGCOLOR);
break;
default:
break;
}
var ret = await MathView.InvokeScriptAsync("ChangeColor", new string[] { CURRENT_FGCOLOR.ToCssRGBA(), CURRENT_BGCOLOR.ToCssRGBA() });
//await GetMathImage(true);
}
private static async void InitMathView()
{
// MathView is really slow on first load, so arbitrarily initialise one in the background now.
// After this, others load at acceptable speed.
MathView initialiser = new MathView {
LaTeX = @"\text{whatever}"
};
}
private async Task <WriteableBitmap> GetMathImage(bool force = false)
{
if (CURRENT_IMAGE == null || force)
{
var scale = await MathView.InvokeScriptAsync("GetPageZoomRatio", null);
var ratio = 1.0;
double.TryParse(scale, out ratio);
if (ratio <= 0.0)
{
ratio = 1.0;
}
//else ratio = Math.Ceiling(ratio);
var wb = await MathView.ToWriteableBitmap();
if (wb is WriteableBitmap)
{
var space = 2;
var tolerance = space * 2;
var size = await MathView.InvokeScriptAsync("GetEquationRect", null);
if (!string.IsNullOrEmpty(size))
{
try
{
var sv = size.Split(',');
var l = (int)Math.Floor(double.Parse(sv[0].Trim()));
var t = (int)Math.Floor(double.Parse(sv[1].Trim()));
var w = (int)Math.Ceiling(double.Parse(sv[2].Trim()));
var h = (int)Math.Ceiling(double.Parse(sv[3].Trim()));
l = (int)Math.Min(l * ratio, Math.Max(0, l - tolerance));
t = (int)Math.Min(t * ratio, Math.Max(0, t - tolerance));
w = (int)Math.Max(w + tolerance * 2, Math.Min(wb.PixelWidth, w * Math.Ceiling(ratio) + tolerance * 2));
h = (int)Math.Max(h + tolerance * 2, Math.Min(wb.PixelHeight, h * Math.Ceiling(ratio) + tolerance * 2));
wb = wb.Crop(l, t, w, h);
}
catch (Exception)
{
}
}
wb = wb.Crop(space);
}
CURRENT_IMAGE = wb;
}
return(CURRENT_IMAGE);
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
try
{
var ret = await MathView.InvokeScriptAsync("ChangeColor", new string[] { CURRENT_FGCOLOR.ToCssRGBA(), CURRENT_BGCOLOR.ToCssRGBA() });
//var ret = await mathView.InvokeScriptAsync("LoadMathJax", null);
//if (ret.Equals("OK", StringComparison.CurrentCultureIgnoreCase))
{
//edSrc.IsEnabled = true;
}
}
catch
{
}
}
private async Task <Size> GetMathSize()
{
Size result = Size.Empty;
var scale = await MathView.InvokeScriptAsync("GetPageZoomRatio", null);
var ratio = 1.0;
double.TryParse(scale, out ratio);
if (ratio == 0.0)
{
ratio = 1;
}
else
{
ratio = Math.Max(0, ratio);
}
var space = 2;
var tolerance = space * 2;
var size = await MathView.InvokeScriptAsync("GetEquationRect", null);
if (!string.IsNullOrEmpty(size))
{
try
{
var sv = size.Split(',');
var l = (int)Math.Floor(double.Parse(sv[0].Trim()));
var t = (int)Math.Floor(double.Parse(sv[1].Trim()));
var w = (int)Math.Ceiling(double.Parse(sv[2].Trim()));
var h = (int)Math.Ceiling(double.Parse(sv[3].Trim()));
l = Math.Max(0, l - tolerance);
t = Math.Max(0, t - tolerance);
w = Math.Max(w, (int)(w * ratio) + tolerance * 2);
h = Math.Max(h, (int)(h * ratio) + tolerance * 2);
result.Width = w;
result.Height = h;
}
catch (Exception)
{
}
}
return(result);
}
private async Task <bool> GeneratingMath()
{
bool result = false;
var lines = edSrc.Text.Trim().Split(new char[] { '\n', '\r' });
StringBuilder sb = new StringBuilder();
foreach (var l in lines)
{
if (string.IsNullOrEmpty(l))
{
continue;
}
var idx = l.Replace("\\%", "\\\\").IndexOf("%");
var line = idx >= 0 ? l.Substring(0, idx) : l;
if (string.IsNullOrEmpty(line))
{
continue;
}
//if (!line.EndsWith("\\\\")) line = $"{line} \\\\ ";
line = await line.Decoder(TextCodecs.CODEC.HTML, Encoding.UTF8);
sb.AppendLine(line);
}
var tex = string.Join(Environment.NewLine, sb);
if (!string.IsNullOrEmpty(tex))
{
try
{
ResetMathView();
var ret = await MathView.InvokeScriptAsync("ChangeEquation", new string[] { tex });
if (ret.Equals("OK", StringComparison.CurrentCultureIgnoreCase))
{
result = true;
}
SetMathView();
CURRENT_FORMULAR = tex;
}
catch (Exception) { }
}
return(result);
}
static MoreExamples()
{
var demoLabels = new Dictionary <byte, MathView>();
var labels = new Dictionary <byte, MathView>();
// Demo formulae
// Quadratic formula
demoLabels[0] = new MathView {
LaTeX = @"x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[0].FontSize = 15;
// This is first label so set the height from the top
demoLabels[1] = new MathView {
LaTeX = @"\color{#ff3399}{(a_1+a_2)^2}=a_1^2+2a_1a_2+a_2^2",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[2] = new MathView {
LaTeX = @"\cos(\theta + \varphi) =
\cos(\theta)\cos(\varphi) - \sin(\theta)\sin(\varphi)",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[3] = new MathView {
LaTeX = @"\frac{1}{\left(\sqrt{\phi \sqrt{5}}-\phi\right) e^{\frac25 \pi}}
= 1+\frac{e^{-2\pi}} {1 +\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } }",
HeightRequest = 150,
FontSize = 22.5f
};
demoLabels[4] = new MathView {
LaTeX = @"\sigma = \sqrt{\frac{1}{N}\sum_{i=1}^N (x_i - \mu)^2}",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[5] = new MathView {
LaTeX = @"\neg(P\land Q) \iff (\neg P)\lor(\neg Q)",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[6] = new MathView {
LaTeX = @"\log_b(x) = \frac{\log_a(x)}{\log_a(b)}",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[7] = new MathView {
LaTeX = @"\lim_{x\to\infty}\left(1 + \frac{k}{x}\right)^x = e^k",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[8] = new MathView {
LaTeX = @"\int_{-\infty}^\infty \! e^{-x^2} dx = \sqrt{\pi}",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[9] = new MathView {
LaTeX = @"\frac 1 n \sum_{i=1}^{n}x_i \geq \sqrt[n]{\prod_{i=1}^{n}x_i}",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[10] = new MathView {
LaTeX = @"f^{(n)}(z_0) = \frac{n!}{2\pi i}\oint_\gamma\frac{f(z)}{(z-z_0)^{n+1}}\,dz",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[11] = new MathView {
LaTeX = @"i\hbar\frac{\partial}{\partial t}\mathbf\Psi(\mathbf{x},t) =
-\frac{\hbar}{2m}\nabla^2\mathbf\Psi(\mathbf{x},t) +
V(\mathbf{x})\mathbf\Psi(\mathbf{x},t)",
HeightRequest = 75,
FontSize = 22.5f
};
demoLabels[12] = new MathView {
LaTeX = @"\left(\sum_{k=1}^n a_k b_k \right)^2 \le \left(\sum_{k=1}^n a_k^2\right)\left(\sum_{k=1}^n b_k^2\right)",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[13] = new MathView {
LaTeX = @"{n \brace k} = \frac{1}{k!}\sum_{j=0}^k (-1)^{k-j}\binom{k}{j}(k-j)^n",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[14] = new MathView {
LaTeX = @"f(x) = \int\limits_{-\infty}^\infty\!\hat f(\xi)\,e^{2 \pi i \xi x}\,\mathrm{d}\xi",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[15] = new MathView {
LaTeX = @"\begin{gather}
\dot{x} = \sigma(y-x) \\
\dot{y} = \rho x - y - xz \\
\dot{z} = -\beta z + xy
\end{gather}",
HeightRequest = 131.25,
FontSize = 22.5f
};
demoLabels[16] = new MathView {
LaTeX = @"\vec \bf V_1 \times \vec \bf V_2 = \begin{vmatrix}
\hat \imath &\hat \jmath &\hat k \\
\frac{\partial X}{\partial u} & \frac{\partial Y}{\partial u} & 0 \\
\frac{\partial X}{\partial v} & \frac{\partial Y}{\partial v} & 0
\end{vmatrix}",
HeightRequest = 131.25,
FontSize = 22.5f
};
demoLabels[17] = new MathView {
LaTeX = @"\begin{eqalign}
\nabla \cdot \vec{\bf{E}} & = \frac {\rho} {\varepsilon_0} \\
\nabla \cdot \vec{\bf{B}} & = 0 \\
\nabla \times \vec{\bf{E}} &= - \frac{\partial\vec{\bf{B}}}{\partial t} \\
\nabla \times \vec{\bf{B}} & = \mu_0\vec{\bf{J}} + \mu_0\varepsilon_0 \frac{\partial\vec{\bf{E}}}{\partial t}
\end{eqalign}",
HeightRequest = 262.5,
FontSize = 22.5f
};
demoLabels[18] = new MathView {
LaTeX = @"\begin{pmatrix}
a & b\\ c & d
\end{pmatrix}
\begin{pmatrix}
\alpha & \beta \\ \gamma & \delta
\end{pmatrix} =
\begin{pmatrix}
a\alpha + b\gamma & a\beta + b \delta \\
c\alpha + d\gamma & c\beta + d \delta
\end{pmatrix}",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[19] = new MathView {
LaTeX = @"\frak Q(\lambda,\hat{\lambda}) =
-\frac{1}{2} \mathbb P(O \mid \lambda ) \sum_s \sum_m \sum_t \gamma_m^{(s)} (t) +\\
\quad \left( \log(2 \pi ) + \log \left| \cal C_m^{(s)} \right| +
\left( o_t - \hat{\mu}_m^{(s)} \right) ^T \cal C_m^{(s)-1} \right)",
HeightRequest = 168.75,
FontSize = 22.5f
};
demoLabels[20] = new MathView {
LaTeX = @"f(x) = \begin{cases}
\frac{e^x}{2} & x \geq 0 \\
1 & x < 0
\end{cases}",
HeightRequest = 112.5,
FontSize = 22.5f
};
demoLabels[21] = new MathView {
LaTeX = @"\color{#ff3333}{c}\color{#9933ff}{o}\color{#ff0080}{l}+\color{#99ff33}{\frac{\color{#ff99ff}{o}}{\color{#990099}{r}}}-\color{#33ffff}{\sqrt[\color{#3399ff}{e}]{\color{#3333ff}{d}}}",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Test formulae
labels[0] = new MathView {
LaTeX = @"3+2-5 = 0",
HeightRequest = 75,
FontSize = 22.5f
};
labels[0].BackgroundColor = Color.FromHsla(0.15, 0.2, 1.0, 1.0);
// Infix and prefix Operators
labels[1] = new MathView {
LaTeX = @"12+-3 > +14",
HeightRequest = 75,
FontSize = 22.5f
};
labels[1].BackgroundColor = Color.FromHsla(0.15, 0.2, 1.0, 1.0);
labels[1].TextAlignment = TextAlignment.Center;
// Punct, parens
labels[2] = new MathView {
LaTeX = @"(-3-5=-8, -6-7=-13)",
HeightRequest = 75,
FontSize = 22.5f
};
// Latex commands
labels[3] = new MathView {
LaTeX = @"5\times(-2 \div 1) = -10",
HeightRequest = 75,
FontSize = 22.5f
};
labels[3].BackgroundColor = Color.FromHsla(0.15, 0.2, 1.0, 1.0);
labels[3].TextAlignment = TextAlignment.Right;
labels[4] = new MathView {
LaTeX = @"-h - (5xy+2) = z",
HeightRequest = 75,
FontSize = 22.5f
};
// Text mode fraction
labels[5] = new MathView {
LaTeX = @"\frac12x + \frac{3\div4}2y = 25",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[5].LineStyle = LineStyle.Text;
// Display mode fraction
labels[6] = new MathView {
LaTeX = @"\frac{x+\frac{12}{5}}{y}+\frac1z = \frac{xz+y+\frac{12}{5}z}{yz}",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[6].BackgroundColor = Color.FromHsla(0.15, 0.2, 1.0, 1.0);
// fraction in fraction in text mode
labels[7] = new MathView {
LaTeX = @"\frac{x+\frac{12}{5}}{y}+\frac1z = \frac{xz+y+\frac{12}{5}z}{yz}",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[7].BackgroundColor = Color.FromHsla(0.15, 0.2, 1.0, 1.0);
labels[7].LineStyle = LineStyle.Text;
// Exponents and subscripts
// Large font
labels[8] = new MathView {
LaTeX = @"\frac{x^{2+3y}}{x^{2+4y}} = x^y \times \frac{z_1^{y+1}}{z_1^{y+1}}",
HeightRequest = 168.75,
FontSize = 22.5f
};
labels[8].FontSize = 30;
labels[8].TextAlignment = TextAlignment.Center;
// Small font
labels[9] = new MathView {
LaTeX = @"\frac{x^{2+3y}}{x^{2+4y}} = x^y \times \frac{z_1^{y+1}}{z_1^{y+1}}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[9].FontSize = 10;
labels[9].TextAlignment = TextAlignment.Center;
// Square root
labels[10] = new MathView {
LaTeX = @"5+\sqrt{2}+3",
HeightRequest = 75,
FontSize = 22.5f
};
// Square root inside square roots and with fractions
labels[11] = new MathView {
LaTeX = @"\sqrt{\frac{\sqrt{\frac{1}{2}} + 3}{\sqrt5^x}}+\sqrt{3x}+x^{\sqrt2}",
HeightRequest = 168.75,
FontSize = 22.5f
};
// General root
labels[12] = new MathView {
LaTeX = @"\sqrt[3]{24} + 3\sqrt{2}24",
HeightRequest = 75,
FontSize = 22.5f
};
// Fractions and formulae in root
labels[13] = new MathView {
LaTeX = @"\sqrt[x+\frac{3}{4}]{\frac{2}{4}+1}",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Non-symbol operators with no limits
labels[14] = new MathView {
LaTeX = @"\sin^2(\theta)=\log_3^2(\pi)",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Non-symbol operators with limits
labels[15] = new MathView {
LaTeX = @"\lim_{x\to\infty}\frac{e^2}{1-x}=\limsup_{\sigma}5",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Symbol operators with limits
labels[16] = new MathView {
LaTeX = @"\sum_{n=1}^{\infty}\frac{1+n}{1-n}=\bigcup_{A\in\Im}C\cup B",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Symbol operators with limits text style
labels[17] = new MathView {
LaTeX = @"\sum_{n=1}^{\infty}\frac{1+n}{1-n}=\bigcup_{A\in\Im}C\cup B",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[17].LineStyle = LineStyle.Text;
// Non-symbol operators with limits text style
labels[18] = new MathView {
LaTeX = @"\lim_{x\to\infty}\frac{e^2}{1-x}=\limsup_{\sigma}5",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[18].LineStyle = LineStyle.Text;
// Symbol operators with no limits
labels[19] = new MathView {
LaTeX = @"\int_{0}^{\infty}e^x \,dx=\oint_0^{\Delta}5\Gamma",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Test italic correction for large ops
labels[20] = new MathView {
LaTeX = @"\int\int\int^{\infty}\int_0\int^{\infty}_0\int",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Test italic correction for superscript/subscript
labels[21] = new MathView {
LaTeX = @"U_3^2UY_3^2U_3Y^2f_1f^2ff",
HeightRequest = 112.5,
FontSize = 22.5f
};
// Error
labels[22] = new MathView {
LaTeX = @"\notacommand",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[23] = new MathView {
LaTeX = @"\sqrt{1}",
HeightRequest = 37.5,
FontSize = 22.5f
};
labels[24] = new MathView {
LaTeX = @"\sqrt[|]{1}",
HeightRequest = 37.5,
FontSize = 22.5f
};
labels[25] = new MathView {
LaTeX = @"{n \choose k}",
HeightRequest = 112.5,
FontSize = 22.5f
};
labels[26] = new MathView {
LaTeX = @"{n \choose k}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[26].LineStyle = LineStyle.Text;
labels[27] = new MathView {
LaTeX = @"\left({n \atop k}\right)",
HeightRequest = 75,
FontSize = 22.5f
};
labels[28] = new MathView {
LaTeX = @"\left({n \atop k}\right)",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[28].LineStyle = LineStyle.Text;
labels[29] = new MathView {
LaTeX = @"\underline{xyz}+\overline{abc}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[30] = new MathView {
LaTeX = @"\underline{\frac12}+\overline{\frac34}",
HeightRequest = 93.75,
FontSize = 22.5f
};
labels[31] = new MathView {
LaTeX = @"\underline{x^\overline{y}_\overline{z}+5}",
HeightRequest = 93.75,
FontSize = 22.5f
};
// spacing examples from the TeX book
labels[32] = new MathView {
LaTeX = @"\int\!\!\!\int_D dx\,dy",
HeightRequest = 93.75,
FontSize = 22.5f
};
// no spacing
labels[33] = new MathView {
LaTeX = @"\int\int_D dxdy",
HeightRequest = 93.75,
FontSize = 22.5f
};
labels[34] = new MathView {
LaTeX = @"y\,dx-x\,dy",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[35] = new MathView {
LaTeX = @"y dx - x dy",
HeightRequest = 56.25,
FontSize = 22.5f
};
// large spaces
labels[36] = new MathView {
LaTeX = @"hello\ from \quad the \qquad other\ side",
HeightRequest = 56.25,
FontSize = 22.5f
};
// Accents
labels[37] = new MathView {
LaTeX = @"\vec x \; \hat y \; \breve {x^2} \; \tilde x \tilde x^2 x^2",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[38] = new MathView {
LaTeX = @"\hat{xyz} \; \widehat{xyz}\; \vec{2ab}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[39] = new MathView {
LaTeX = @"\hat{\frac12} \; \hat{\sqrt 3}",
HeightRequest = 93.75,
FontSize = 22.5f
};
// large roots
labels[40] = new MathView {
LaTeX = @"\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\sqrt{1+\cdots}}}}}",
HeightRequest = 150,
FontSize = 22.5f
};
labels[41] = new MathView {
LaTeX = @"\begin{bmatrix}
a & b\\ c & d \\ e & f \\ g & h \\ i & j
\end{bmatrix}",
HeightRequest = 225,
FontSize = 22.5f
};
labels[42] = new MathView {
LaTeX = @"x{\scriptstyle y}z",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[43] = new MathView {
LaTeX = @"x \mathrm x \mathbf x \mathcal X \mathfrak x \mathsf x \bm x \mathtt x \mathit \Lambda \cal g",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[44] = new MathView {
LaTeX = @"\mathrm{using\ mathrm}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[45] = new MathView {
LaTeX = @"\text{using text}",
HeightRequest = 56.25,
FontSize = 22.5f
};
labels[46] = new MathView {
LaTeX = @"\text{Mary has }\$500 + \$200.",
HeightRequest = 56.25,
FontSize = 22.5f
};
Views = demoLabels.Concat(labels).Select(p => p.Value).ToList().AsReadOnly();
}
public async Task DoWork()
{
try
{
Expression PGcd1 = new Expression("lcm(" + BCPodZnamenatel.ToString() + "," + ACPodZnamenatel.ToString() + "," + ABPodZnamenatel.ToString() + ")");
double Pgcd = PGcd1.calculate();
var view = new MathView();
view.FontSize = 55;
view.HorizontalOptions = view.VerticalOptions = LayoutOptions.FillAndExpand;
view.LaTeX = @"P=a+b+c";
var view2 = new MathView();
var Preshenie1 = new MathView();
Preshenie1.FontSize = 55;
if (ABPodZnamenatel == 1 && BCPodZnamenatel == 1 && ACPodZnamenatel == 1)
{
view2.LaTeX = @"P=\frac{" + ABNadZnamenatel.ToString() + "}" + "{" + ABPodZnamenatel.ToString() + "} + " + @"\frac{ " + BCNadZnamenatel.ToString() + "} " + "{ " + BCPodZnamenatel.ToString() + "} + " + @"\frac{ " + ACNadZnamenatel.ToString() + "} " + "{ " + ACPodZnamenatel.ToString() + "}=" + @"\frac{ " + (ABNadZnamenatel + BCNadZnamenatel + ACNadZnamenatel).ToString() + "} " + "{1}";
}
else
{
view2.LaTeX = @"P=\frac{" + ABNadZnamenatel.ToString() + "}" + "{" + ABPodZnamenatel.ToString() + "} + " + @"\frac{ " + BCNadZnamenatel.ToString() + "} " + "{ " + BCPodZnamenatel.ToString() + "} + " + @"\frac{ " + ACNadZnamenatel.ToString() + "} " + "{ " + ACPodZnamenatel.ToString() + "}=" + @"\frac{" + (((Pgcd / ABPodZnamenatel) * ABNadZnamenatel) + ((Pgcd / ACPodZnamenatel) * ACNadZnamenatel) + ((Pgcd / BCPodZnamenatel) * BCNadZnamenatel)).ToString() + "}{" + Pgcd.ToString() + "}";
}
view2.FontSize = 55;
var view3 = new MathView();
view3.FontSize = 55;
var view4 = new MathView();
view4.FontSize = 55;
view3.LaTeX = @"S=\sqrt{p(p-a)(p-b)(p-c)}";
double p = (ABNadZnamenatel + BCNadZnamenatel + ACNadZnamenatel);
if (ABPodZnamenatel == 1 && BCPodZnamenatel == 1 && ACPodZnamenatel == 1 && p % 2 == 0)
{
p = p / 2;
view3.LaTeX = @"S=\sqrt{" + p.ToString() + "(" + p.ToString() + "-" + ABNadZnamenatel.ToString() + ")" + "(" + p.ToString() + "-" + BCNadZnamenatel.ToString() + ")" + "(" + p.ToString() + "-" + ACNadZnamenatel.ToString() + ")" + "}";
view4.LaTeX = @"S=\sqrt{" + p.ToString() + "(" + (p - ABNadZnamenatel).ToString() + ")" + "(" + (p - BCNadZnamenatel).ToString() + ")" + "(" + (p - ACNadZnamenatel).ToString() + ")" + "}=" + @"\sqrt{" + (p * (p - ABNadZnamenatel) * (p - ACNadZnamenatel) * (p - BCNadZnamenatel)).ToString() + "}";
double pready = (p * (p - ABNadZnamenatel) * (p - ACNadZnamenatel) * (p - BCNadZnamenatel));
OprostqvaneNaKorena(pready);
}
// else
// {
// view3.LaTeX = @"S=\sqrt{" + @"\frac{" + p.ToString() + "}{2}" + "(" + @"\frac{" + p.ToString() + "}{2}" + "-" + @"\frac{" + ABNadZnamenatel.ToString() + "}{" + ABPodZnamenatel.ToString() + "}" + ")" + "(" + @"\frac{" + p.ToString() + "}{2}" + "-" + @"\frac{" + BCNadZnamenatel.ToString() + "}{" + BCPodZnamenatel.ToString() + "}" + ")" + "(" + @"\frac{" + p.ToString() + "}{2}" + "-" + @"\frac{" + ACNadZnamenatel.ToString() + "}" + "{" + ACPodZnamenatel.ToString() + "}" + ")" + "}";
// double namiraneMe = p * (IzchislenienaZnamenatelSDveChisla1(NamiraneLCMSDveChisla(2, ABPodZnamenatel), ABPodZnamenatel, ABNadZnamenatel, 2, p)) * (IzchislenienaZnamenatelSDveChisla1(NamiraneLCMSDveChisla(2, BCPodZnamenatel), BCPodZnamenatel, BCNadZnamenatel, 2, p)) * (IzchislenienaZnamenatelSDveChisla1(NamiraneLCMSDveChisla(2, ACPodZnamenatel), ACPodZnamenatel, ACNadZnamenatel, 2, p));
// double gorenkoren = namiraneMe;
// dolenkoren = NamiraneLCMSDveChisla(2, ABPodZnamenatel) * NamiraneLCMSDveChisla(2, BCPodZnamenatel) * NamiraneLCMSDveChisla(2, ACPodZnamenatel) * 2;
// view4.LaTeX = @"S=\sqrt{" + @"\frac{" + p.ToString() + "}{2}" + "(" + (IzchislenienaZnamenatelSDveChisla(NamiraneLCMSDveChisla(2, ABPodZnamenatel), ABPodZnamenatel, ABNadZnamenatel, 2, p)).ToString() + ")" + "(" + (IzchislenienaZnamenatelSDveChisla(NamiraneLCMSDveChisla(2, BCPodZnamenatel), BCPodZnamenatel, BCNadZnamenatel, 2, p)).ToString() + ")" + "(" + (IzchislenienaZnamenatelSDveChisla(NamiraneLCMSDveChisla(2, ACPodZnamenatel), ACPodZnamenatel, ACNadZnamenatel, 2, p)).ToString() + ")" + "}=" + @"\sqrt{" + @"\frac{" + namiraneMe.ToString() + "}{" + NamiraneLCMSDveChisla(2, ABPodZnamenatel) * NamiraneLCMSDveChisla(2, BCPodZnamenatel) * NamiraneLCMSDveChisla(2, ACPodZnamenatel) * 2 + "}" + "}";
// OprostqvaneNaKorena1(gorenkoren);
// }
GridTomath.Children.Add(view);
GridP2.Children.Add(view2);
SReshenie.Children.Add(view3);
Sreshenie2.Children.Add(view4);
}
catch (Exception ex)
{
await DisplayAlert("", "resh", "OK");
}
}
public DerivationViewer(EquationItem equationItem, string backToName = "List")
{
InitializeComponent();
this.ViewerTitle.Text = equationItem.LabelText;
this.BackButton.Text = $"Back to {backToName}";
MathView view = new MathView()
{
FontSize = equationItem.FontSize, HeightRequest = equationItem.HeightRequest
};
view.LaTeX = $@"{equationItem.EquationLatex}";
this.ViewArea.Children.Add(view);
BoxView boxView = new BoxView
{
HeightRequest = 1,
BackgroundColor = Color.FromHex("#999"),
Margin = new Thickness(0, 20, 0, 20)
};
this.ViewArea.Children.Add(boxView);
foreach (var s in equationItem.DerivationStepsLatex)
{
if (s.IsButton)
{
StackLayout infoArea = new StackLayout
{
Orientation = StackOrientation.Horizontal
};
Label forTheAbove = new Label
{
Text = $"For the above: ",
VerticalOptions = LayoutOptions.Center,
VerticalTextAlignment = TextAlignment.Center,
};
Label infoLabel = new Label
{
Text = $"See \"{s.ButtonNavigation}\"",
VerticalOptions = LayoutOptions.Center,
VerticalTextAlignment = TextAlignment.Center,
};
Button infoButton = new Button
{
Text = "PEEK",
Style = (Style)Application.Current.Resources["BlueButton"],
VerticalOptions = LayoutOptions.Center,
FontSize = 14,
};
infoButton.Clicked += async(sender, args) =>
{
var equationToShow = Equations.EquationsList.FirstOrDefault(x => x.LabelText == s.ButtonNavigation);
if (equationToShow != null)
{
await this.Navigation.PushModalAsync(new DerivationViewer(equationToShow, equationItem.LabelText));
}
};
infoArea.Children.Add(forTheAbove);
infoArea.Children.Add(infoLabel);
infoArea.Children.Add(infoButton);
this.ViewArea.Children.Add(infoArea);
}
else
{
MathView newview = new MathView {
FontSize = s.FontSize, HeightRequest = s.HeightRequest
};
newview.LaTeX = $@"{s.Latex}";
this.ViewArea.Children.Add(newview);
}
}
}
