fec7c907f8
* add line style * start line style * More fixes * undo key * more tweaks * address comments * Fix merge
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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#include "pch.h"
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#include "Equation.h"
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using namespace Platform;
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using namespace Platform::Collections;
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using namespace std;
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using namespace Windows::Foundation::Collections;
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using namespace Windows::UI;
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using namespace Windows::UI::ViewManagement;
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using namespace Windows::UI::Xaml;
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using namespace Windows::UI::Xaml::Media;
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namespace GraphControl
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{
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// Remove mml: formatting specific to RichEditBox control, which is not understood by the graph engine.
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static constexpr wstring_view s_mathPrefix = L"mml:";
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Equation::Equation()
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{
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}
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String ^ Equation::GetRequest()
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{
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wstring request;
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wstring_view expr{ Expression->Data() };
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IsInequality = false;
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// Check for unicode characters of less than, less than or equal to, greater than and greater than or equal to.
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if (expr.find(L">><") != wstring_view::npos || expr.find(L"><<") != wstring_view::npos || expr.find(L">≥<") != wstring_view::npos
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|| expr.find(L">≤<") != wstring_view::npos || expr.find(8805) != wstring_view::npos || expr.find(8804) != wstring_view::npos
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|| expr.find(L"><<") != wstring_view::npos || expr.find(L">><") != wstring_view::npos)
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{
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request = L"<mrow><mi>plotIneq2D</mi><mfenced separators=\"\">";
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IsInequality = true;
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EquationStyle = EquationLineStyle::Dash;
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}
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else if (expr.find(L">=<") != wstring_view::npos)
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{
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request = L"<mrow><mi>plotEq2d</mi><mfenced separators=\"\">";
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}
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// If the expression contains both x and y but no equal or inequality sign, then that cannot be graphed.
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else if (expr.find(L">x<") != wstring_view::npos && (expr.find(L">y<") != wstring_view::npos))
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{
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return nullptr;
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}
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// Else default to plot2d
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else
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{
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request = L"<mrow><mi>plot2d</mi><mfenced separators=\"\">";
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}
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request += GetExpression();
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request += L"</mfenced></mrow>";
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return ref new String(request.c_str());
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}
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wstring Equation::GetExpression()
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{
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wstring mathML = Expression->Data();
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size_t mathPrefix = 0;
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while ((mathPrefix = mathML.find(s_mathPrefix, mathPrefix)) != wstring::npos)
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{
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mathML.replace(mathPrefix, s_mathPrefix.length(), L"");
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mathPrefix += s_mathPrefix.length();
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}
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return mathML;
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}
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Color Equation::LineColor::get()
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{
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return m_LineColor;
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}
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void Equation::LineColor::set(Color value)
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{
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if (m_LineColor.R != value.R || m_LineColor.G != value.G || m_LineColor.B != value.B || m_LineColor.A != value.A)
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{
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m_LineColor = value;
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RaisePropertyChanged(L"LineColor");
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}
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}
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Platform::String ^ Equation::LineColorPropertyName::get()
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{
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return Platform::StringReference(L"LineColor");
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}
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bool Equation::IsGraphableEquation()
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{
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return !Expression->IsEmpty() && IsLineEnabled && !HasGraphError;
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}
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}
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