/// <summary>Creates a new edit box control</summary>
public EditBox(Dialog parent)
: base(parent)
{
controlType = ControlType.EditBox;
parentDialog = parent;
border = 5; // Default border
spacing = 4; // default spacing
isCaretOn = true;
textData = new System.Windows.Forms.RichTextBox();
// Create the control
textData.Visible = true;
textData.Font = new System.Drawing.Font("Arial", 8.0f);
textData.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.None;
textData.Multiline = false;
textData.Text = string.Empty;
textData.MaxLength = ushort.MaxValue; // 65k characters should be plenty
textData.WordWrap = false;
// Now create the control
textData.CreateControl();
isHidingCaret = false;
firstVisible = 0;
blinkTime = NativeMethods.GetCaretBlinkTime() * 0.001f;
lastBlink = FrameworkTimer.GetAbsoluteTime();
textColor = new ColorValue(0.06f, 0.06f, 0.06f, 1.0f);
selectedTextColor = new ColorValue(1.0f, 1.0f, 1.0f, 1.0f);
selectedBackColor = new ColorValue(0.15f, 0.196f, 0.36f, 1.0f);
caretColor = new ColorValue(0, 0, 0, 1.0f);
caretPosition = textData.SelectionStart = 0;
isInsertMode = true;
isMouseDragging = false;
}
/// <summary>Render the control</summary>
public override void Render(Device device, float elapsedTime)
{
if (!IsVisible)
{
return; // Nothing to render
}
// Render the control graphics
for (int i = 0; i <= LowerRightBorder; ++i)
{
Element e = elementList[i] as Element;
e.TextureColor.Blend(ControlState.Normal, elapsedTime);
parentDialog.DrawSprite(e, elementRects[i]);
}
//
// Compute the X coordinates of the first visible character.
//
int xFirst = textData.GetPositionFromCharIndex(firstVisible).X;
int xCaret = textData.GetPositionFromCharIndex(caretPosition).X;
int xSel;
if (caretPosition != textData.SelectionStart)
{
xSel = textData.GetPositionFromCharIndex(textData.SelectionStart).X;
}
else
{
xSel = xCaret;
}
// Render the selection rectangle
System.Drawing.Rectangle selRect = System.Drawing.Rectangle.Empty;
if (caretPosition != textData.SelectionStart)
{
int selLeft = xCaret, selRight = xSel;
// Swap if left is beigger than right
if (selLeft > selRight)
{
int temp = selLeft;
selLeft = selRight;
selRight = temp;
}
selRect = System.Drawing.Rectangle.FromLTRB(
selLeft, textRect.Top, selRight, textRect.Bottom);
selRect.Offset(textRect.Left - xFirst, 0);
selRect.Intersect(textRect);
Parent.DrawRectangle(selRect, selectedBackColor);
}
// Render the text
Element textElement = elementList[TextLayer] as Element;
textElement.FontColor.Current = textColor;
parentDialog.DrawText(textData.Text.Substring(firstVisible), textElement, textRect);
// Render the selected text
if (caretPosition != textData.SelectionStart)
{
int firstToRender = Math.Max(firstVisible, Math.Min(textData.SelectionStart, caretPosition));
int numToRender = Math.Max(textData.SelectionStart, caretPosition) - firstToRender;
textElement.FontColor.Current = selectedTextColor;
parentDialog.DrawText(textData.Text.Substring(firstToRender, numToRender), textElement, selRect);
}
//
// Blink the caret
//
if (FrameworkTimer.GetAbsoluteTime() - lastBlink >= blinkTime)
{
isCaretOn = !isCaretOn;
lastBlink = FrameworkTimer.GetAbsoluteTime();
}
//
// Render the caret if this control has the focus
//
if (hasFocus && isCaretOn && !isHidingCaret)
{
// Start the rectangle with insert mode caret
System.Drawing.Rectangle caretRect = textRect;
caretRect.Width = 2;
caretRect.Location = new System.Drawing.Point(
caretRect.Left - xFirst + xCaret - 1,
caretRect.Top);
// If we are in overwrite mode, adjust the caret rectangle
// to fill the entire character.
if (!isInsertMode)
{
// Obtain the X coord of the current character
caretRect.Width = 4;
}
parentDialog.DrawRectangle(caretRect, caretColor);
}
}
/// <summary>Reset's the caret blink time</summary>
protected void ResetCaretBlink()
{
isCaretOn = true;
lastBlink = FrameworkTimer.GetAbsoluteTime();
}
