mirror of
https://github.com/gui-cs/Terminal.Gui.git
synced 2026-01-01 16:59:35 +01:00
530 lines
14 KiB
C#
530 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using Terminal.Gui;
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using Terminal.Gui.Trees;
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using System.Linq;
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using System.Globalization;
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using System.IO;
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using System.Text;
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using NStack;
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namespace UICatalog.Scenarios {
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[ScenarioMetadata (Name: "Csv Editor", Description: "Open and edit simple CSV files using the TableView class.")]
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[ScenarioCategory ("TableView")]
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[ScenarioCategory ("Controls")]
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[ScenarioCategory ("Dialogs")]
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[ScenarioCategory ("Text and Formatting")]
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[ScenarioCategory ("Dialogs")]
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[ScenarioCategory ("Top Level Windows")]
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[ScenarioCategory ("Files and IO")]
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public class CsvEditor : Scenario
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{
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TableView tableView;
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private string currentFile;
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private MenuItem miLeft;
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private MenuItem miRight;
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private MenuItem miCentered;
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private Label selectedCellLabel;
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public override void Setup ()
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{
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Win.Title = this.GetName();
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Win.Y = 1; // menu
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Win.Height = Dim.Fill (1); // status bar
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Top.LayoutSubviews ();
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this.tableView = new TableView () {
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X = 0,
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Y = 0,
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Width = Dim.Fill (),
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Height = Dim.Fill (1),
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};
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var menu = new MenuBar (new MenuBarItem [] {
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new MenuBarItem ("_File", new MenuItem [] {
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new MenuItem ("_Open CSV", "", () => Open()),
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new MenuItem ("_Save", "", () => Save()),
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new MenuItem ("_Quit", "", () => Quit()),
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}),
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new MenuBarItem ("_Edit", new MenuItem [] {
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new MenuItem ("_New Column", "", () => AddColumn()),
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new MenuItem ("_New Row", "", () => AddRow()),
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new MenuItem ("_Rename Column", "", () => RenameColumn()),
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new MenuItem ("_Delete Column", "", () => DeleteColum()),
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new MenuItem ("_Move Column", "", () => MoveColumn()),
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new MenuItem ("_Move Row", "", () => MoveRow()),
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new MenuItem ("_Sort Asc", "", () => Sort(true)),
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new MenuItem ("_Sort Desc", "", () => Sort(false)),
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}),
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new MenuBarItem ("_View", new MenuItem [] {
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miLeft = new MenuItem ("_Align Left", "", () => Align(TextAlignment.Left)),
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miRight = new MenuItem ("_Align Right", "", () => Align(TextAlignment.Right)),
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miCentered = new MenuItem ("_Align Centered", "", () => Align(TextAlignment.Centered)),
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// Format requires hard typed data table, when we read a CSV everything is untyped (string) so this only works for new columns in this demo
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miCentered = new MenuItem ("_Set Format Pattern", "", () => SetFormat()),
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})
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});
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Top.Add (menu);
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var statusBar = new StatusBar (new StatusItem [] {
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new StatusItem(Key.CtrlMask | Key.O, "~^O~ Open", () => Open()),
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new StatusItem(Key.CtrlMask | Key.S, "~^S~ Save", () => Save()),
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new StatusItem(Key.CtrlMask | Key.Q, "~^Q~ Quit", () => Quit()),
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});
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Top.Add (statusBar);
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Win.Add (tableView);
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selectedCellLabel = new Label(){
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X = 0,
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Y = Pos.Bottom(tableView),
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Text = "0,0",
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Width = Dim.Fill(),
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TextAlignment = TextAlignment.Right
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};
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Win.Add(selectedCellLabel);
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tableView.SelectedCellChanged += OnSelectedCellChanged;
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tableView.CellActivated += EditCurrentCell;
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tableView.KeyPress += TableViewKeyPress;
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SetupScrollBar();
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}
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private void OnSelectedCellChanged (TableView.SelectedCellChangedEventArgs e)
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{
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selectedCellLabel.Text = $"{tableView.SelectedRow},{tableView.SelectedColumn}";
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if(tableView.Table == null || tableView.SelectedColumn == -1)
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return;
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var col = tableView.Table.Columns[tableView.SelectedColumn];
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var style = tableView.Style.GetColumnStyleIfAny(col);
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miLeft.Checked = style?.Alignment == TextAlignment.Left;
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miRight.Checked = style?.Alignment == TextAlignment.Right;
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miCentered.Checked = style?.Alignment == TextAlignment.Centered;
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}
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private void RenameColumn ()
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{
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if(NoTableLoaded()) {
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return;
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}
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var currentCol = tableView.Table.Columns[tableView.SelectedColumn];
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if(GetText("Rename Column","Name:",currentCol.ColumnName,out string newName)) {
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currentCol.ColumnName = newName;
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tableView.Update();
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}
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}
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private void DeleteColum()
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{
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if(NoTableLoaded()) {
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return;
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}
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if(tableView.SelectedColumn == -1) {
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MessageBox.ErrorQuery("No Column","No column selected", "Ok");
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return;
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}
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try {
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tableView.Table.Columns.RemoveAt(tableView.SelectedColumn);
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tableView.Update();
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} catch (Exception ex) {
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MessageBox.ErrorQuery("Could not remove column",ex.Message, "Ok");
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}
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}
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private void MoveColumn ()
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{
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if(NoTableLoaded()) {
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return;
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}
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if(tableView.SelectedColumn == -1) {
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MessageBox.ErrorQuery("No Column","No column selected", "Ok");
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return;
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}
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try{
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var currentCol = tableView.Table.Columns[tableView.SelectedColumn];
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if(GetText("Move Column","New Index:",currentCol.Ordinal.ToString(),out string newOrdinal)) {
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var newIdx = Math.Min(Math.Max(0,int.Parse(newOrdinal)),tableView.Table.Columns.Count-1);
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currentCol.SetOrdinal(newIdx);
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tableView.SetSelection(newIdx,tableView.SelectedRow,false);
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tableView.EnsureSelectedCellIsVisible();
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tableView.SetNeedsDisplay();
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}
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}catch(Exception ex)
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{
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MessageBox.ErrorQuery("Error moving column",ex.Message, "Ok");
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}
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}
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private void Sort (bool asc)
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{
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if(NoTableLoaded()) {
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return;
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}
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if(tableView.SelectedColumn == -1) {
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MessageBox.ErrorQuery("No Column","No column selected", "Ok");
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return;
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}
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var colName = tableView.Table.Columns[tableView.SelectedColumn].ColumnName;
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tableView.Table.DefaultView.Sort = colName + (asc ? " asc" : " desc");
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tableView.Table = tableView.Table.DefaultView.ToTable();
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}
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private void MoveRow ()
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{
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if(NoTableLoaded()) {
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return;
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}
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if(tableView.SelectedRow == -1) {
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MessageBox.ErrorQuery("No Rows","No row selected", "Ok");
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return;
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}
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try{
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int oldIdx = tableView.SelectedRow;
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var currentRow = tableView.Table.Rows[oldIdx];
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if(GetText("Move Row","New Row:",oldIdx.ToString(),out string newOrdinal)) {
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var newIdx = Math.Min(Math.Max(0,int.Parse(newOrdinal)),tableView.Table.Rows.Count-1);
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if(newIdx == oldIdx)
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return;
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var arrayItems = currentRow.ItemArray;
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tableView.Table.Rows.Remove(currentRow);
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// Removing and Inserting the same DataRow seems to result in it loosing its values so we have to create a new instance
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var newRow = tableView.Table.NewRow();
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newRow.ItemArray = arrayItems;
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tableView.Table.Rows.InsertAt(newRow,newIdx);
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tableView.SetSelection(tableView.SelectedColumn,newIdx,false);
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tableView.EnsureSelectedCellIsVisible();
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tableView.SetNeedsDisplay();
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}
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}catch(Exception ex)
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{
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MessageBox.ErrorQuery("Error moving column",ex.Message, "Ok");
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}
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}
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private void Align (TextAlignment newAlignment)
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{
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if (NoTableLoaded ()) {
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return;
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}
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var col = tableView.Table.Columns[tableView.SelectedColumn];
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var style = tableView.Style.GetOrCreateColumnStyle(col);
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style.Alignment = newAlignment;
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miLeft.Checked = style.Alignment == TextAlignment.Left;
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miRight.Checked = style.Alignment == TextAlignment.Right;
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miCentered.Checked = style.Alignment == TextAlignment.Centered;
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tableView.Update();
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}
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private void SetFormat()
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{
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if (NoTableLoaded ()) {
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return;
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}
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var col = tableView.Table.Columns[tableView.SelectedColumn];
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if(col.DataType == typeof(string)) {
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MessageBox.ErrorQuery("Cannot Format Column","String columns cannot be Formatted, try adding a new column to the table with a date/numerical Type","Ok");
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return;
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}
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var style = tableView.Style.GetOrCreateColumnStyle(col);
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if(GetText("Format","Pattern:",style.Format ?? "",out string newPattern)) {
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style.Format = newPattern;
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tableView.Update();
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}
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}
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private bool NoTableLoaded ()
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{
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if(tableView.Table == null) {
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MessageBox.ErrorQuery("No Table Loaded","No table has currently be opened","Ok");
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return true;
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}
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return false;
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}
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private void AddRow ()
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{
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if(NoTableLoaded()) {
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return;
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}
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var newRow = tableView.Table.NewRow();
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var newRowIdx = Math.Min(Math.Max(0,tableView.SelectedRow+1),tableView.Table.Rows.Count);
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tableView.Table.Rows.InsertAt(newRow,newRowIdx);
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tableView.Update();
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}
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private void AddColumn ()
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{
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if(NoTableLoaded()) {
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return;
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}
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if(GetText("Enter column name","Name:","",out string colName)) {
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var col = new DataColumn(colName);
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var newColIdx = Math.Min(Math.Max(0,tableView.SelectedColumn + 1),tableView.Table.Columns.Count);
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int result = MessageBox.Query(40,15,"Column Type","Pick a data type for the column",new ustring[]{"Date","Integer","Double","Text","Cancel"});
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if(result <= -1 || result >= 4)
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return;
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switch(result) {
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case 0: col.DataType = typeof(DateTime);
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break;
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case 1: col.DataType = typeof(int);
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break;
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case 2: col.DataType = typeof(double);
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break;
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case 3: col.DataType = typeof(string);
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break;
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}
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tableView.Table.Columns.Add(col);
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col.SetOrdinal(newColIdx);
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tableView.Update();
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}
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}
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private void Save()
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{
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if(tableView.Table == null || string.IsNullOrWhiteSpace(currentFile)) {
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MessageBox.ErrorQuery("No file loaded","No file is currently loaded","Ok");
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return;
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}
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var sb = new StringBuilder();
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sb.AppendLine(string.Join(",",tableView.Table.Columns.Cast<DataColumn>().Select(c=>c.ColumnName)));
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foreach(DataRow row in tableView.Table.Rows) {
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sb.AppendLine(string.Join(",",row.ItemArray));
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}
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File.WriteAllText(currentFile,sb.ToString());
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}
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private void Open()
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{
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var ofd = new FileDialog("Select File","Open","File","Select a CSV file to open (does not support newlines, escaping etc)");
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ofd.AllowedFileTypes = new string[]{".csv" };
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Application.Run(ofd);
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if(!ofd.Canceled && !string.IsNullOrWhiteSpace(ofd.FilePath?.ToString()))
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{
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Open(ofd.FilePath.ToString());
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}
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}
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private void Open(string filename)
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{
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int lineNumber = 0;
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currentFile = null;
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try {
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var dt = new DataTable();
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var lines = File.ReadAllLines(filename);
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foreach(var h in lines[0].Split(',')){
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dt.Columns.Add(h);
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}
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foreach(var line in lines.Skip(1)) {
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lineNumber++;
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dt.Rows.Add(line.Split(','));
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}
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tableView.Table = dt;
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// Only set the current filename if we succesfully loaded the entire file
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currentFile = filename;
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}
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catch(Exception ex) {
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MessageBox.ErrorQuery("Open Failed",$"Error on line {lineNumber}{Environment.NewLine}{ex.Message}","Ok");
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}
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}
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private void SetupScrollBar ()
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{
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var _scrollBar = new ScrollBarView (tableView, true);
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_scrollBar.ChangedPosition += () => {
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tableView.RowOffset = _scrollBar.Position;
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if (tableView.RowOffset != _scrollBar.Position) {
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_scrollBar.Position = tableView.RowOffset;
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}
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tableView.SetNeedsDisplay ();
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};
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/*
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_scrollBar.OtherScrollBarView.ChangedPosition += () => {
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_listView.LeftItem = _scrollBar.OtherScrollBarView.Position;
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if (_listView.LeftItem != _scrollBar.OtherScrollBarView.Position) {
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_scrollBar.OtherScrollBarView.Position = _listView.LeftItem;
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}
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_listView.SetNeedsDisplay ();
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};*/
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tableView.DrawContent += (e) => {
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_scrollBar.Size = tableView.Table?.Rows?.Count ??0;
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_scrollBar.Position = tableView.RowOffset;
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// _scrollBar.OtherScrollBarView.Size = _listView.Maxlength - 1;
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// _scrollBar.OtherScrollBarView.Position = _listView.LeftItem;
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_scrollBar.Refresh ();
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};
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}
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private void TableViewKeyPress (View.KeyEventEventArgs e)
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{
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if(e.KeyEvent.Key == Key.DeleteChar){
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if(tableView.FullRowSelect)
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{
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// Delete button deletes all rows when in full row mode
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foreach(int toRemove in tableView.GetAllSelectedCells().Select(p=>p.Y).Distinct().OrderByDescending(i=>i))
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tableView.Table.Rows.RemoveAt(toRemove);
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}
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else{
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// otherwise set all selected cells to null
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foreach(var pt in tableView.GetAllSelectedCells())
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{
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tableView.Table.Rows[pt.Y][pt.X] = DBNull.Value;
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}
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}
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tableView.Update();
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e.Handled = true;
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}
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}
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private void ClearColumnStyles ()
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{
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tableView.Style.ColumnStyles.Clear();
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tableView.Update();
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}
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private void CloseExample ()
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{
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tableView.Table = null;
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}
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private void Quit ()
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{
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Application.RequestStop ();
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}
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private bool GetText(string title, string label, string initialText, out string enteredText)
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{
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bool okPressed = false;
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var ok = new Button ("Ok", is_default: true);
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ok.Clicked += () => { okPressed = true; Application.RequestStop (); };
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var cancel = new Button ("Cancel");
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cancel.Clicked += () => { Application.RequestStop (); };
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var d = new Dialog (title, 60, 20, ok, cancel);
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var lbl = new Label() {
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X = 0,
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Y = 1,
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Text = label
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};
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var tf = new TextField()
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{
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Text = initialText,
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X = 0,
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Y = 2,
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Width = Dim.Fill()
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};
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d.Add (lbl,tf);
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tf.SetFocus();
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Application.Run (d);
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enteredText = okPressed? tf.Text.ToString() : null;
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return okPressed;
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}
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private void EditCurrentCell (TableView.CellActivatedEventArgs e)
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{
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if(e.Table == null)
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return;
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var oldValue = e.Table.Rows[e.Row][e.Col].ToString();
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if(GetText("Enter new value",e.Table.Columns[e.Col].ColumnName,oldValue, out string newText)) {
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try {
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e.Table.Rows[e.Row][e.Col] = string.IsNullOrWhiteSpace(newText) ? DBNull.Value : (object)newText;
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}
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catch(Exception ex) {
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MessageBox.ErrorQuery(60,20,"Failed to set text", ex.Message,"Ok");
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}
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tableView.Update();
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}
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}
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}
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}
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