public void RemoveAndUndoAllItems()
{
var model = new ListModel <string>(20);
model.AddItem("a");
model.AddItem("bb");
model.AddItem("ccc");
model.RemoveItem(0);
model.RemoveItem(0);
model.RemoveItem(0);
Assert.AreEqual(new List <string>(), model.Items);
model.Undo();
model.Undo();
model.Undo();
Assert.AreEqual(new List <string> {
"a", "bb", "ccc"
}, model.Items);
}
public TasksForm()
{
model = new ListModel <string>(20);
model.AddItem("Составить список дел на сегодня");
model.AddItem("Домашка по C#");
model.AddItem("Решить задачу 1519");
this.Text = "Список дел на сегодня";
this.Font = new Font("Serif", 11);
this.Size = new Size(400, 300);
TasksList = new ListBox
{
Dock = DockStyle.Fill
};
TasksList.Items.AddRange(model.Items.ToArray());
var label = new Label
{
Text = "Введите новое задание",
Dock = DockStyle.Fill
};
textBox = new TextBox
{
Dock = DockStyle.Fill,
};
buttonAdd = new Button
{
Text = "Добавить",
Dock = DockStyle.Fill
};
buttonUndo = new Button
{
Text = "Отменить",
Dock = DockStyle.Fill,
Enabled = model.CanUndo()
};
buttonRemove = new Button
{
Text = "Удалить",
Dock = DockStyle.Fill,
Enabled = false
};
var table = new TableLayoutPanel
{
Padding = new Padding(5, 10, 5, 10)
};
table.RowStyles.Clear();
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 35));
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 35));
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 33));
table.RowStyles.Add(new RowStyle(SizeType.Percent, 50));
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 30));
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 30));
table.RowStyles.Add(new RowStyle(SizeType.Absolute, 30));
table.RowStyles.Add(new RowStyle(SizeType.Percent, 50));
table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 1));
table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 75));
table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 25));
table.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 1));
table.Controls.Add(new Panel(), 3, 3);
table.Controls.Add(TasksList, 1, 3);
table.Controls.Add(label, 1, 0);
table.Controls.Add(textBox, 1, 1);
table.Controls.Add(buttonAdd, 2, 1);
var interTable = new TableLayoutPanel
{
Dock = DockStyle.Fill,
Margin = new Padding(0),
Padding = new Padding(0)
};
interTable.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50));
interTable.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50));
interTable.Controls.Add(buttonUndo, 1, 0);
interTable.Controls.Add(buttonRemove, 0, 0);
table.Controls.Add(interTable, 1, 2);
table.LayoutSettings.SetColumnSpan(interTable, 2);
table.Dock = DockStyle.Fill;
Controls.Add(table);
textBox.KeyDown += (sender, args) =>
{
if (args.KeyCode == Keys.Enter)
{
AddTask();
args.Handled = true;
args.SuppressKeyPress = true;
}
};
buttonAdd.Click += (sender, args) => AddTask();
buttonUndo.Click += (sender, args) =>
{
if (model.CanUndo())
{
model.Undo();
TasksList.Items.Clear();
TasksList.Items.AddRange(model.Items.ToArray());
}
if (!model.CanUndo())
{
buttonUndo.Enabled = false;
}
};
buttonRemove.Click += (sender, args) =>
{
int index = TasksList.SelectedIndex;
if (index != -1)
{
model.RemoveItem(index);
TasksList.Items.Clear();
TasksList.Items.AddRange(model.Items.ToArray());
buttonRemove.Enabled = false;
if (model.CanUndo())
{
buttonUndo.Enabled = true;
}
}
};
TasksList.SelectedIndexChanged += (sender, args) =>
{
buttonRemove.Enabled = TasksList.SelectedIndex != -1;
};
}
public CommandBuilder(ListModel <TItem> listModel)
{
this.ListModel = listModel;
}
public Command(ListModel <T> model)
{
items = model.Items;
}
public CommandRemove(ListModel <T> model, int indexToRemove) : base(model)
{
items = model.Items;
index = indexToRemove;
item = items[index];
}
public CommandAdd(ListModel <T> model, T itemToAdd) : base(model)
{
item = itemToAdd;
index = items.Count;
}