From 17015a3e643f93e61c7250fc2ba8f1704624f19e Mon Sep 17 00:00:00 2001
From: Elias Fierke <elias.fierke@outlook.com>
Date: Fri, 25 Apr 2025 16:13:00 +0200
Subject: [PATCH] [feat:] pdf export options (working)

---
 CorrectionViewModel.cs |  81 +++++++++++++++++++++++
 ExportOptions.axaml    |  48 ++++++++++++++
 ExportOptions.axaml.cs |  27 ++++++++
 MainWindow.axaml.cs    |  11 +++-
 PFDExporter.cs         | 141 +++++++++++++++++++++++++++++++++--------
 5 files changed, 279 insertions(+), 29 deletions(-)
 create mode 100644 CorrectionViewModel.cs
 create mode 100644 ExportOptions.axaml
 create mode 100644 ExportOptions.axaml.cs

diff --git a/CorrectionViewModel.cs b/CorrectionViewModel.cs
new file mode 100644
index 0000000..888249c
--- /dev/null
+++ b/CorrectionViewModel.cs
@@ -0,0 +1,81 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace PLG_Exam.ViewModels;
+
+public class ExportOptionsViewModel : INotifyPropertyChanged
+{
+    private bool hasCorrectionLines = false;
+    private int correctionMargin = 50;
+    private double lineSpacing= 1.5;
+    private string textPosition="left";
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+
+    protected void OnPropertyChanged([CallerMemberName] string? name = null) =>
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
+
+    // ToggleSwitch
+    public bool HasCorrectionLines
+    {
+        get => hasCorrectionLines;
+        set { hasCorrectionLines = value; OnPropertyChanged(); }
+    }
+
+    // Korrekturrand – RadioButtons mapped auf int
+    public bool IsCorrectionMarginHalf
+    {
+        get => correctionMargin == 100;
+        set { if (value) { correctionMargin = 100; OnPropertyChanged(); } }
+    }
+
+    public bool IsCorrectionMarginQuarter
+    {
+        get => correctionMargin == 50;
+        set { if (value) { correctionMargin = 50; OnPropertyChanged(); } }
+    }
+
+    public bool IsCorrectionMarginNone
+    {
+        get => correctionMargin == 0;
+        set { if (value) { correctionMargin = 0; OnPropertyChanged(); } }
+    }
+
+    // Zeilenabstand
+    public bool IsLineSpacing1
+    {
+        get => lineSpacing == 1.0;
+        set { if (value) { lineSpacing = 1.0; OnPropertyChanged(); } }
+    }
+
+    public bool IsLineSpacing15
+    {
+        get => lineSpacing == 1.5;
+        set { if (value) { lineSpacing = 1.5; OnPropertyChanged(); } }
+    }
+
+    public bool IsLineSpacing2
+    {
+        get => lineSpacing == 2.0;
+        set { if (value) { lineSpacing = 2.0; OnPropertyChanged(); } }
+    }
+
+    // Textposition
+    public bool IsTextLeft
+    {
+        get => textPosition == "left";
+        set { if (value) { textPosition = "left"; OnPropertyChanged(); } }
+    }
+
+    public bool IsTextRight
+    {
+        get => textPosition == "right";
+        set { if (value) { textPosition = "right"; OnPropertyChanged(); } }
+    }
+
+    // Optional: Getter für externe Verwendung
+    public int CorrectionMargin => correctionMargin;
+    public double LineSpacing => lineSpacing;
+    public string TextPosition => textPosition;
+}
\ No newline at end of file
diff --git a/ExportOptions.axaml b/ExportOptions.axaml
new file mode 100644
index 0000000..1ccec5f
--- /dev/null
+++ b/ExportOptions.axaml
@@ -0,0 +1,48 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:vm="clr-namespace:PLG_Exam.ViewModels"
+        x:DataType="vm:ExportOptionsViewModel"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        Width="350" Height="350"
+        MinWidth="350" MinHeight="350" MaxHeight="350" MaxWidth="350"
+        x:Class="PLG_Exam.ExportOptions"
+        Title="Klausur abgeben">
+   <ScrollViewer>
+        <StackPanel Margin="20" Spacing="20">
+
+            <Grid ColumnDefinitions="*,Auto" VerticalAlignment="Center">
+                <TextBlock Text="Korrekturlinien" VerticalAlignment="Center" Grid.Column="0" />
+                <ToggleSwitch IsChecked="{Binding HasCorrectionLines}" VerticalAlignment="Center" Grid.Column="1" HorizontalAlignment="Right"/>
+            </Grid>
+
+            <StackPanel>
+                <TextBlock Text="Korrekturrand" FontWeight="Bold"/>
+                <StackPanel Orientation="Horizontal" Spacing="10">
+                    <RadioButton GroupName="CorrectionMargin" Content="300" IsChecked="{Binding IsCorrectionMarginHalf}" />
+                    <RadioButton GroupName="CorrectionMargin" Content="150" IsChecked="{Binding IsCorrectionMarginQuarter}" />
+                    <RadioButton GroupName="CorrectionMargin" Content="Keiner" IsChecked="{Binding IsCorrectionMarginNone}" />
+                </StackPanel>
+            </StackPanel>
+
+            <StackPanel>
+                <TextBlock Text="Zeilenabstand" FontWeight="Bold"/>
+                <StackPanel Orientation="Horizontal" Spacing="10">
+                    <RadioButton GroupName="LineSpacing" Content="1-zeilig" IsChecked="{Binding IsLineSpacing1}" />
+                    <RadioButton GroupName="LineSpacing" Content="1.5-zeilig" IsChecked="{Binding IsLineSpacing15}" />
+                    <RadioButton GroupName="LineSpacing" Content="2-zeilig" IsChecked="{Binding IsLineSpacing2}" />
+                </StackPanel>
+            </StackPanel>
+
+            <StackPanel>
+                <TextBlock Text="Textposition" FontWeight="Bold"/>
+                <StackPanel Orientation="Horizontal" Spacing="10">
+                    <RadioButton GroupName="TextPosition" Content="Links" IsChecked="{Binding IsTextLeft}" />
+                    <RadioButton GroupName="TextPosition" Content="Rechts" IsChecked="{Binding IsTextRight}" />
+                </StackPanel>
+            </StackPanel>
+            <Button Content="Abgeben" HorizontalContentAlignment="Center" HorizontalAlignment="Stretch" Click="OnSubmitClick"  />
+        </StackPanel>
+    </ScrollViewer>
+</Window>
diff --git a/ExportOptions.axaml.cs b/ExportOptions.axaml.cs
new file mode 100644
index 0000000..fe48aed
--- /dev/null
+++ b/ExportOptions.axaml.cs
@@ -0,0 +1,27 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Markup.Xaml;
+using PLG_Exam.ViewModels;
+
+
+namespace PLG_Exam;
+
+public partial class ExportOptions : Window
+{
+    public ExportOptions()
+    {
+        InitializeComponent();
+        DataContext = new ExportOptionsViewModel();
+    }
+
+    private async void OnSubmitClick(object sender, RoutedEventArgs e)
+    {
+        var viewModel = (ExportOptionsViewModel)DataContext;
+        MainWindow._instance.ExportToPdf(viewModel.CorrectionMargin, viewModel.LineSpacing, viewModel.HasCorrectionLines, viewModel.TextPosition);
+        this.Close();
+    }
+
+    
+
+}
\ No newline at end of file
diff --git a/MainWindow.axaml.cs b/MainWindow.axaml.cs
index 3a069ca..b71142c 100644
--- a/MainWindow.axaml.cs
+++ b/MainWindow.axaml.cs
@@ -175,7 +175,10 @@ namespace PLG_Exam
 
         private async void OnSubmitClick(object sender, RoutedEventArgs e)
         {
-           ExportToPdf();
+            ExportOptions exportOptions = new ExportOptions();
+            exportOptions.WindowStartupLocation = WindowStartupLocation.CenterScreen;
+            await exportOptions.ShowDialog(this);
+            
         }
 
 
@@ -720,9 +723,11 @@ namespace PLG_Exam
 
 
 
-        public void ExportToPdf(){
+        public void ExportToPdf(int margin, double lineSpacing, bool hasCorrectionLines, string textPosition){
             _ = GetCurrentExamDataAsJson();
-            PFDExporter.ExportToPdf(_currentExam);
+            PFDExporter exp = new PFDExporter();
+            //exp.ExportToPdf(_currentExam, margin, lineSpacing, hasCorrectionLines, textPosition);
+            exp.ExportAllCombinations(_currentExam);
         }
 
     }
diff --git a/PFDExporter.cs b/PFDExporter.cs
index 06d9e8b..96654d4 100644
--- a/PFDExporter.cs
+++ b/PFDExporter.cs
@@ -11,17 +11,31 @@ using System.Globalization;
 using MigraDoc.DocumentObjectModel;
 using System.Net.NetworkInformation;
 using Avalonia.Styling;
+using System.IO;
 
 namespace PLG_Exam;
 
-public static class PFDExporter
+public class PFDExporter
 {
-    public static Exam exam;
-    public static async void ExportToPdf(Exam examData)
+    public Exam exam;
+    public async void ExportToPdf(Exam examData, int correctionMargin, double lineSpacing, bool hasCorrectionLines, string textPosition, string filePath = null)
     {
         try
         {
             exam = examData;
+            corr_margin = correctionMargin*3;
+            if(corr_margin == 0){
+                corr_margin = 50;
+            }
+            if(lineSpacing == 1.0){
+                lineHeight = 15;
+            } else if(lineSpacing == 1.5){
+                lineHeight = 21;
+            } else if(lineSpacing == 2.0){
+                lineHeight = 27;
+            }
+            this.hasCorrectionLines = hasCorrectionLines;
+            this.textPosition = textPosition;
             //_ = GetCurrentExamDataAsJson();
 
             if(examData.Name.IsValueNullOrEmpty() || examData.Vorname.IsValueNullOrEmpty() || examData.Title.IsValueNullOrEmpty() || examData.Datum == null){
@@ -29,12 +43,15 @@ public static class PFDExporter
                 return;
             }
 
-            var saveDialog = new SaveFileDialog
-            {
-                DefaultExtension = "pdf",
-                Filters = { new FileDialogFilter { Name = "PDF files", Extensions = { "pdf" } } }
-            };
-            var filePath = await saveDialog.ShowAsync(MainWindow._instance);
+            if(filePath==null){
+                var saveDialog = new SaveFileDialog
+                {
+                    DefaultExtension = "pdf",
+                    Filters = { new FileDialogFilter { Name = "PDF files", Extensions = { "pdf" } } }
+                };
+                filePath = await saveDialog.ShowAsync(MainWindow._instance);
+            }
+            
             if (string.IsNullOrEmpty(filePath)) return;
 
             var font = new XFont("Cantarell", 14, XFontStyleEx.Bold);
@@ -130,7 +147,7 @@ public static class PFDExporter
         }
     }
 
-    private static bool isInternetAvailable()
+    private bool isInternetAvailable()
     {
         try
         {
@@ -145,10 +162,10 @@ public static class PFDExporter
             return false;
         }
     }
-    public static bool isEscaped = false;
-    public static bool isBold = false;
-    public static bool isUnderline = false;
-    private static List<(string Text, XFont Font, XBrush Brush)> ParseFormattedText(string text, XFont regularFont, XFont boldFont, XFont underlineFont)
+    public bool isEscaped = false;
+    public bool isBold = false;
+    public bool isUnderline = false;
+    private List<(string Text, XFont Font, XBrush Brush)> ParseFormattedText(string text, XFont regularFont, XFont boldFont, XFont underlineFont)
     {
         var result = new List<(string Text, XFont Font, XBrush Brush)>();
         var currentFont = regularFont;
@@ -232,7 +249,7 @@ public static class PFDExporter
         return result;
     }
 
-    private static void DrawFormattedText(XGraphics gfx, string text, XFont regularFont, XFont boldFont, XFont underlineFont, XRect rect)
+    private void DrawFormattedText(XGraphics gfx, string text, XFont regularFont, XFont boldFont, XFont underlineFont, XRect rect)
     {
         var parsedText = ParseFormattedText(text, regularFont, boldFont, underlineFont);
         double x = rect.X;
@@ -246,11 +263,14 @@ public static class PFDExporter
         }
     }
 
-    private static void DrawTaskWithPageBreak(PdfDocument document, ExamTab tab, XFont font, XFont headerFont, XFont smallFont)
+    private double corr_margin = 300; // Seitenrand Korrektur
+    private double lineHeight = 21; // Höhe einer Textzeile
+    private bool hasCorrectionLines = false; // Korrekturrand aktiv
+    private string textPosition = "left"; // Textposition (links, rechts, zentriert)
+
+    private void DrawTaskWithPageBreak(PdfDocument document, ExamTab tab, XFont font, XFont headerFont, XFont smallFont)
     {
         const double margin = 50; // Seitenränder
-        const double corr_margin = 300; // Seitenrand Korrektur
-        const double lineHeight = 21; // Höhe einer Textzeile
         const double headerHeight = 30; // Platz für die Kopfzeile pro Seite
         const double footerHeight = 20; // Platz für die Fußzeile
         const double usableHeight = 842 - margin * 2 - headerHeight - footerHeight; // Höhe des nutzbaren Bereichs
@@ -263,26 +283,58 @@ public static class PFDExporter
 
         foreach (var line in lines)
         {
+            // Wenn eine neue Seite benötigt wird (Seitenumbruch)
             if (page == null || currentHeight + lineHeight > usableHeight)
             {
                 page = document.AddPage();
                 gfx = XGraphics.FromPdfPage(page);
                 currentHeight = 0;
 
+                // Kopfzeile zeichnen
                 DrawName(gfx, tab, smallFont, margin, headerHeight, document.PageCount);
                 DrawHeader(gfx, tab, headerFont, margin, headerHeight);
             }
 
-            var rect = new XRect(corr_margin, margin + headerHeight * headerline_count + currentHeight, page.Width - margin, lineHeight);
+            // Berechnung der Textposition
+            XRect rect;
+            
+
+            // Berechnung der Textposition basierend auf `textPosition`
+            if (textPosition == "right")
+            {
+                rect = new XRect(margin + corr_margin - margin, margin + headerHeight + currentHeight, page.Width - margin - corr_margin, lineHeight);
+                if (hasCorrectionLines && corr_margin > margin)
+                {
+                    // Korrekturlinie wird nur neben dem Text gezeichnet (nur so breit wie der Korrekturrand)
+                    var correctionLineRect = new XRect(margin, margin + headerHeight + currentHeight + 15, corr_margin-margin-10, 1);
+                    gfx.DrawRectangle(XBrushes.LightGray, correctionLineRect);
+                    currentHeight += 1; // Korrekturlinie nimmt Platz ein
+                }
+            }
+            else // links
+            {
+                rect = new XRect(margin, margin + headerHeight + currentHeight, page.Width - (2 * margin) - corr_margin, lineHeight);
+                if (hasCorrectionLines && corr_margin > margin)
+                {
+                    // Korrekturlinie wird nur neben dem Text gezeichnet (nur so breit wie der Korrekturrand)
+                    var correctionLineRect = new XRect(page.Width - corr_margin, margin + headerHeight + currentHeight + 15, corr_margin - margin, 1);
+                    gfx.DrawRectangle(XBrushes.LightGray, correctionLineRect);
+                    currentHeight += 1; // Korrekturlinie nimmt Platz ein
+                }
+            }
+
+            // Text formatieren und zeichnen
             DrawFormattedText(gfx, line, font, new XFont(font.Name, font.Size, XFontStyleEx.Bold), new XFont(font.Name, font.Size, XFontStyleEx.Underline), rect);
-            currentHeight += lineHeight;
+            currentHeight += lineHeight; // Zeilenhöhe für die nächste Zeile erhöhen
         }
 
         gfx?.Dispose();
     }
 
-    private static int headerline_count = 0;
-    private static void DrawHeader(XGraphics gfx, ExamTab tab, XFont font, double margin, double headerHeight)
+
+
+    private int headerline_count = 0;
+    private void DrawHeader(XGraphics gfx, ExamTab tab, XFont font, double margin, double headerHeight)
     {
         var maxWidth = gfx.PageSize.Width - margin * 2; // verfügbare Breite
         var lines = SplitTextIntoLines($"Aufgabe {tab.Aufgabennummer}: {tab.Überschrift}", maxWidth, font);
@@ -300,7 +352,7 @@ public static class PFDExporter
         
     }
 
-    private static void AddPageNumbers(PdfDocument document, XFont font, double margin)
+    private void AddPageNumbers(PdfDocument document, XFont font, double margin)
     {
         
         int totalPages = document.PageCount;
@@ -316,7 +368,7 @@ public static class PFDExporter
         }
     }
 
-    private static void DrawName(XGraphics gfx, ExamTab tab, XFont font, double margin, double headerHeight, int page_num)
+    private void DrawName(XGraphics gfx, ExamTab tab, XFont font, double margin, double headerHeight, int page_num)
     {
         var headerText = $"{exam.Name}, {exam.Vorname}";
         gfx.DrawString(headerText, font, XBrushes.Gray, new XRect(margin, margin-15, gfx.PageSize.Width - margin * 2, headerHeight), XStringFormats.TopLeft);
@@ -330,7 +382,7 @@ public static class PFDExporter
     }
 
     // Methode zum Aufteilen des Textes in Zeilen
-    private static List<string> SplitTextIntoLines(string text, double maxWidth, XFont font)
+    private List<string> SplitTextIntoLines(string text, double maxWidth, XFont font)
     {
         var lines = new List<string>();
 
@@ -384,7 +436,7 @@ public static class PFDExporter
 
     
 
-    private static void SetPdfLanguage(PdfSharp.Pdf.PdfDocument document, string language = "de")
+    private void SetPdfLanguage(PdfSharp.Pdf.PdfDocument document, string language = "de")
     {
         var catalog = document.Internals.Catalog;
 
@@ -397,4 +449,41 @@ public static class PFDExporter
             catalog.Elements.Add("/Lang", new PdfSharp.Pdf.PdfString(language));
         }
     }
+
+    public void ExportAllCombinations(Exam curr_exam)
+    {
+        exam = curr_exam;
+        // Mögliche Werte für die Variablen
+        var textPositions = new[] { "left", "right" };
+        var hasCorrectionLinesOptions = new[] { true, false };
+        var correctionMargins = new[] { 100.0, 50.0, 0.0 };
+        var lineHeights = new[] { 2.0, 1.5, 1.0 };
+
+        // Ordner für die gespeicherten PDFs
+         string folderPath = "/home/fierke/Schreibtisch";
+        if (!Directory.Exists(folderPath))
+        {
+            Directory.CreateDirectory(folderPath); // Ordner erstellen, falls nicht vorhanden
+        }
+
+        // Generiere alle Kombinationen und exportiere das PDF
+        foreach (var textPosition in textPositions)
+        {
+            foreach (var hasCorrectionLines in hasCorrectionLinesOptions)
+            {
+                foreach (var correctionMargin in correctionMargins)
+                {
+                    foreach (var lineHeight in lineHeights)
+                    {
+                        // Dateiname basierend auf den aktuellen Parametern
+                        string fileName = $"{textPosition}_{hasCorrectionLines}_{correctionMargin}_{lineHeight}.pdf";
+                        string filePath = Path.Combine(folderPath, fileName);
+
+                        // Erstelle das PDF für diese Kombination
+                        ExportToPdf(curr_exam,(int)correctionMargin,lineHeight, hasCorrectionLines,textPosition,filePath);
+                    }
+                }
+            }
+        }
+    }
 }