/// <summary>Deletes the selection that was made.</summary>
/// <param name="textBox">The text box.</param>
/// <exception cref="System.ArgumentNullException">TextBox was null.</exception>
public static void DeleteSelection(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selectionBox = textBox.TextBoxSelection;
var cursor = textBox.TextBoxCursor;
var textToModify = textBox.Text;
textToModify = textToModify.Remove(selectionBox.ConfigBegin, selectionBox.ConfigGetCharacterSelectionLength());
selectionBox.ConfigBegin = selectionBox.ConfigBegin;
selectionBox.ConfigEnd = selectionBox.ConfigEnd;
selectionBox.ConfigActive = false;
cursor.ConfigIndex = selectionBox.ConfigBegin;
cursor.ConfigShowCursor = true;
cursor.ConfigBlinking = true;
textBox.Text = textToModify;
}
/// <summary>
/// Select all text in the text box.
/// </summary>
/// <param name="textBox">The text box.</param>
public static void DoSelectAll(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selectionBox = textBox.TextBoxSelection;
var cursor = textBox.TextBoxCursor;
selectionBox.ConfigBegin = 0;
selectionBox.ConfigEnd = textBox.Text.Length;
selectionBox.ConfigActive = true;
cursor.ConfigIndex = textBox.Text.Length;
cursor.ConfigShowCursor = true;
cursor.ConfigBlinking = true;
}
/// <summary>
/// Set the cursor to given location.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <param name="cursorIndex">Index of the cursor.</param>
/// <exception cref="System.ArgumentNullException">TextBox was null.</exception>
public void DoCursorLocation(TextBox textBox, int cursorIndex)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selectionBox = textBox.TextBoxSelection;
var cursor = textBox.TextBoxCursor;
if (cursorIndex < 0)
{
cursorIndex = 0;
}
var text = textBox.Text;
if (string.IsNullOrEmpty(text))
{
cursorIndex = 0;
}
else if (cursorIndex > textBox.Text.Length)
{
cursorIndex = textBox.Text.Length;
}
cursor.ConfigIndex = cursorIndex;
selectionBox.ConfigActive = false;
this.ValidateAndRepair(textBox);
}
/// <summary>
/// Checks if all text is selected.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <returns>True if all text is selected</returns>
/// <exception cref="System.ArgumentNullException">TextBox can not be null.</exception>
public static bool CheckIfAllTextIsSelected(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selectionControl = textBox.TextBoxSelection;
if (string.IsNullOrEmpty(textBox.Text) || selectionControl.ConfigBegin != 0 || selectionControl.ConfigBegin != textBox.Text.Length || selectionControl.ConfigActive == false)
{
return false;
}
return true;
}
private void MakeVisualDataFromConfig(TextBox textBox)
{
var textControl = textBox.Label;
var text = textBox.Label;
var cursor = textBox.TextBoxCursor;
// populate visual text-data
text.StateMaximumSize = new DVector2(textControl.StateCalculatedWidth, textControl.StateCalculatedHeight);
text.State.DrawPosition = textControl.State.DrawPosition;
text.State.Offset = new DVector2(textControl.StateCalculatedOffsetX, textControl.StateCalculatedOffsetY);
var firstCharacterShown = text.StateFirstCharacterIndexShown;
var shownCharacterLength = text.StateShownCharacterCount;
text.StateTextShown = textBox.Text.Substring(firstCharacterShown, shownCharacterLength);
// populate visual cursor data
var partBetweenFirstCharAndCursorLength = cursor.ConfigIndex - firstCharacterShown;
var partBetweenFirstCharAndCursorText = text.StateTextShown.Substring(0, partBetweenFirstCharAndCursorLength);
var fontName = textBox.Theme.FontName;
var sizeOfFirstPart = textControl.Manager.ImageCompositor.ReadSizeString(fontName, partBetweenFirstCharAndCursorText);
var sizeOfAGiantLetter = textControl.Manager.ImageCompositor.ReadSizeString(fontName, "M");
cursor.State.DrawPosition = textBox.State.DrawPosition;
cursor.State.Offset = new DVector2(sizeOfFirstPart.X, 0);
cursor.State.Width = 1;
cursor.State.Height = sizeOfAGiantLetter.Y;
}
/// <summary>
/// Fixes everything in their boundaries.
/// </summary>
/// <param name="textBox">The text box.</param>
private void FixEveryConfigInTheirBoundaries(TextBox textBox)
{
var label = textBox.Label;
var cursor = textBox.TextBoxCursor;
var selectionBox = textBox.TextBoxSelection;
// place last-char inside text
var lastShownCharIsAt = WhereIs(0, label.StateLastCharacterIndexShown, textBox.Text.Length);
switch (lastShownCharIsAt)
{
case Side.Left:
label.StateLastCharacterIndexShown = 0;
break;
case Side.Right:
label.StateLastCharacterIndexShown = textBox.Text.Length;
break;
}
// place first-char inside text
var firstShownCharIsAt = WhereIs(0, label.StateFirstCharacterIndexShown, textBox.Text.Length);
switch (firstShownCharIsAt)
{
case Side.Left:
label.StateFirstCharacterIndexShown = 0;
break;
case Side.Right:
label.StateFirstCharacterIndexShown = textBox.Text.Length;
break;
}
// place cursor index inside text
var cursorIsAt = WhereIs(label.StateFirstCharacterIndexShown, cursor.ConfigIndex, label.StateLastCharacterIndexShown);
switch (cursorIsAt)
{
case Side.Left:
cursor.ConfigIndex = label.StateFirstCharacterIndexShown;
break;
case Side.Right:
cursor.ConfigIndex = label.StateFirstCharacterIndexShown;
break;
}
// make sure selection box is inside the boundaries of text
if (selectionBox.ConfigBegin < 0)
{
selectionBox.ConfigBegin = 0;
}
if (selectionBox.ConfigEnd > textBox.Text.Length)
{
selectionBox.ConfigEnd = selectionBox.ConfigGetCharacterSelectionLength();
}
if (this.Debug)
{
System.Diagnostics.Debug.WriteLine(label.ToString());
System.Diagnostics.Debug.WriteLine(cursor.ToString());
System.Diagnostics.Debug.WriteLine(selectionBox.ToString());
}
}
/// <summary>
/// Validates the data in the text-box.
/// </summary>
/// <param name="textBox">The text box.</param>
public void ValidateAndRepair(TextBox textBox)
{
this.FixEveryConfigInTheirBoundaries(textBox);
this.MakeVisualDataFromConfig(textBox);
this.FixConfigByCheckingVisual();
}
/// <summary>
/// Does the key delete action.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <exception cref="System.ArgumentNullException">TextBox can not be null.</exception>
public void DoKeyDelete(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var cursor = textBox.TextBoxCursor;
var changed = false;
// if there is no text to look at. then we have nothing to do
var textboxLength = textBox.Text.Length;
if (textboxLength <= 0)
{
return;
}
// remove text that was selected
var allSelected = CheckIfAllTextIsSelected(textBox);
if (allSelected)
{
DeleteSelection(textBox);
changed = true;
}
else if (cursor.ConfigIndex < textBox.Text.Length)
{
// or else remove a character at the right of cursor position
// if the cursor is already at the end , we can't delete
// left part is on the left of the cursor
var leftPart = textBox.Text.Substring(0, cursor.ConfigIndex);
// the right part is on the right of the cursor , but without the first character
var rightPartMinusACharacter = textBox.Text.Substring(cursor.ConfigIndex + 1, textBox.Text.Length - (cursor.ConfigIndex + 1));
// join left and right , resulting in a Delete-action
textBox.Text = leftPart + rightPartMinusACharacter;
changed = true;
}
if (changed)
{
this.ValidateAndRepair(textBox);
}
}
/// <summary>
/// Does the key backspace action.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <exception cref="System.ArgumentNullException">TextBox can not be null.</exception>
public void DoKeyBackspace(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selectionBox = textBox.TextBoxSelection;
var cursor = textBox.TextBoxCursor;
// if there is no text , then do nothing
if (textBox.Text.Length > 0 == false)
{
return;
}
// if there is no selection and the cursor is not already at 0
if (selectionBox.ConfigActive == false && cursor.ConfigIndex > 0)
{
var cursorLocation = cursor.ConfigIndex;
var textToModify = textBox.Text;
textToModify = textToModify.Substring(0, cursorLocation - 1) + textToModify.Substring(cursorLocation, textToModify.Length - cursorLocation);
cursor.ConfigIndex = cursorLocation - 1;
textBox.Text = textToModify;
}
else
{
DeleteSelection(textBox);
}
this.ValidateAndRepair(textBox);
}
/// <summary>
/// Does the cursor right action.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <exception cref="System.ArgumentNullException">TextBox can not be null.</exception>
public void DoCursorRight(TextBox textBox)
{
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var selection = textBox.TextBoxSelection;
var cursor = textBox.TextBoxCursor;
if (cursor.ConfigIndex >= textBox.Text.Length)
{
return;
}
cursor.ConfigIndex = cursor.ConfigIndex + 1;
selection.ConfigActive = false;
this.ValidateAndRepair(textBox);
}
/// <summary>
/// Does the insert text action.
/// </summary>
/// <param name="textBox">The text box.</param>
/// <param name="textToInsert">The text to insert.</param>
/// <exception cref="System.ArgumentNullException">TextBox can not be null.</exception>
/// <exception cref="System.InvalidOperationException">The cursor for given text-box is null</exception>
public void DoInsertText(TextBox textBox, string textToInsert)
{
if (string.IsNullOrEmpty(textToInsert))
{
// nothing to do.. return.
return;
}
#if DEBUG
if (textBox == null)
{
throw new ArgumentNullException("textBox");
}
#endif
var cursor = textBox.TextBoxCursor;
#if DEBUG
if (cursor == null)
{
throw new InvalidOperationException("The cursor for given text-box is null");
}
#endif
//// var changed = false;
// remove text that was selected
var allSelected = CheckIfAllTextIsSelected(textBox);
if (allSelected)
{
DeleteSelection(textBox);
//// changed = true;
}
// if there is already text, then insert it at the cursor-position
var cursorIndex = cursor.ConfigIndex;
var textToModify = textBox.Text;
if (!string.IsNullOrEmpty(textToModify))
{
textToModify = textToModify.Insert(cursorIndex, textToInsert);
//// changed = true;
}
else
{
textToModify = textToInsert;
//// changed = true;
}
textBox.Text = textToModify;
// we must move the cursor because we just inserted some text
cursor.ConfigIndex = cursor.ConfigIndex + textToInsert.Length;
this.ValidateAndRepair(textBox);
}
/// <summary>This will result that we show a extra character to the right side.</summary>
/// <param name="internalTextData">The internal Text Data.</param>
/// <param name="visualTextData">The visual Text Data.</param>
/// <returns>true when succeeded , otherwise false</returns>
public static bool ShiftLastCharShownRight(TextBox internalTextData, Label visualTextData)
{
#if DEBUG
if (internalTextData == null)
{
throw new ArgumentNullException("internalTextData");
}
if (visualTextData == null)
{
throw new ArgumentNullException("visualTextData");
}
#endif
if (visualTextData.StateLastCharacterIndexShown < internalTextData.Text.Length)
{
visualTextData.StateLastCharacterIndexShown++;
return true;
}
return false;
}
/// <summary>Shifts the shown text to the right.</summary>
/// <param name="internalTextData">The internal text data.</param>
/// <param name="visualTextData">The visual text data.</param>
/// <returns>True when successful , otherworldly false.</returns>
/// <exception cref="System.ArgumentNullException">InternalTextData or visualTextData</exception>
public static bool ShiftShownTextToTheRight(TextBox internalTextData, Label visualTextData)
{
#if DEBUG
if (internalTextData == null)
{
throw new ArgumentNullException("internalTextData");
}
if (visualTextData == null)
{
throw new ArgumentNullException("visualTextData");
}
#endif
if (ShiftFirstCharShownToRight(internalTextData, visualTextData) == false)
{
return false;
}
if (ShiftLastCharShownRight(internalTextData, visualTextData) == false)
{
return false;
}
return true;
}
public override void LoadContent()
{
base.LoadContent();
// label
var y = (float)Theme.ControlLargeSpacing + Theme.ControlHeight;
this.Label = new Label("MyLabel")
{
Config =
{
PositionX = Theme.ControlLargeSpacing,
PositionY = y,
},
ConfigText = "Test label ff",
ConfigHorizontalAlignment = HorizontalAlignment.Left,
ConfigVerticalAlignment = VerticalAlignment.Center
};
this.AddControl(this.Label);
// text-box
y = y + this.Label.Config.Height + Theme.ControlSmallSpacing;
this.TextBox = new TextBox("MyTextBox")
{
Config =
{
PositionX = Theme.ControlLargeSpacing,
PositionY = y,
},
Text = "My text control",
};
this.AddControl(this.TextBox);
// multi-line text-box
y = y + this.TextBox.Config.Height + Theme.ControlSmallSpacing;
var multilineTextBox = new MultilineTextBox("MyMultiLineTextBox")
{
Config =
{
PositionX = Theme.ControlLargeSpacing,
PositionY = y,
},
ConfigText = "This is test text.\nTo see if this is working.\nIf you see this.\nAll is working.\n"
};
this.AddControl(multilineTextBox);
Config.Width = this.Label.Config.Width + (Theme.ControlLargeSpacing * 4);
Config.Height = multilineTextBox.Config.PositionY + (multilineTextBox.Config.Height * 4) + Theme.ControlLargeSpacing;
}