private void InitEvent(Window owner)
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
editBox.TextChange += this.OnOwnerTextChanged;
editBox.Sized += this.OnOwnerSizeChanged;
editBox.Moved += this.OnOwnerSizeChanged;
editBox.TextSelectionChanged += this.OnOwnerTextSelectionChanged;
editBox.CaratMoved += this.OnOwnerCaretPositionChanged;
}
public virtual int GetTextIndexFromPosition(Vector2 vec)
{
Nexus.GUI.Widgets.UIEditBox editBox = (Nexus.GUI.Widgets.UIEditBox)owner;
int postion = 0;
if (font != null &&
editBox != null)
{
//if (this.targetRect.IsPointInRect(vec) && editBox.Text.Length > 0)
//为了选择时能让超出显示范围的文本滚动，需要解除IsPointInRect检测
if (editBox.Text.Length > 0)
{
Vector2 v = vec - editBox.AbsolutePosition;
int x = m_TextBuffer.CPtoX(m_StartVisible, false);
return(m_TextBuffer.XtoCP(x + (int)v.x));
}
}
return(postion);
}
/// <summary>
/// TODO(zewu): 优化
/// </summary>
public override void Draw()
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
if (font == null || editBox == null || m_TextBuffer == null)
{
return;
}
StringBuilder editText = new StringBuilder();
if (editBox.TextMasked)
{
editText.Append(editBox.MaskCodePoint, editBox.Text.Length);
}
else
{
editText = editBox.Text;
}
if (m_TextBuffer.Text.Length > 0)
{
//Rect drawRC = this.targetRect;
DrawTextFormat textFormt = DrawTextFormat.Left | DrawTextFormat.NoClip | DrawTextFormat.Top | DrawTextFormat.SingleLine;
// 渲染文本
if (editBox.SelectionLength > 0)
{
if (m_First.Length > 0)
{
font.DrawString(m_First, m_BeforeSelectionRect, textFormt, normalTextColor, shadowColor);
}
GUISystem.Instance.Renderer.DrawRectangle(m_SelectionRect, selectBrushColor);
if (m_Mid.Length > 0)
{
font.DrawString(m_Mid, m_SelectionRect, textFormt, selectTextColor, shadowColor);
}
if (m_Last.Length > 0)
{
font.DrawString(m_Last, m_AfterSelectionRect, textFormt, normalTextColor, shadowColor);
}
}
else
{
font.DrawString(m_First, m_BeforeSelectionRect, textFormt, normalTextColor, shadowColor);
}
}
// 渲染光标
if (editBox.HasInputFocus && !editBox.ReadOnly)
{
int caret_pos = -1;
if (editBox.CaratPosition >= 0)
{
caret_pos = m_TextBuffer.CPtoX(editBox.CaratPosition, false) - m_TextBuffer.CPtoX(m_StartVisible, false);
}
Rect caretRC = new Rect();
caretRC.left = this.targetRect.left + caret_pos;
caretRC.right = caretRC.left + cursorSize;
caretRC.top = targetRect.top;
caretRC.Height = fontDesc.Height;
GUISystem.Instance.Renderer.DrawRectangle(caretRC, cursorColor);
}
}
//重新计算可见字符的范围
private void UpdateVisibleRange()
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
m_TextBuffer.Text = editBox.Text.ToString();
if (m_TextBuffer.Text.Length == 0)
{
m_StartVisible = 0; m_VisibleCount = 0;
m_Last = "";
m_AfterSelectionRect.left = m_AfterSelectionRect.right = m_TextBuffer.CPtoX(0, false);
return;
}
//计算新的可见字符范围
int nx1, nx, nx2;
int cp = editBox.CaratPosition;
nx1 = m_TextBuffer.CPtoX(m_StartVisible, false);
nx = m_TextBuffer.CPtoX(cp, false);
if (cp == m_TextBuffer.Text.Length)
{
nx2 = nx;
}
else
{
nx2 = m_TextBuffer.CPtoX(cp, true);
}
if (nx < nx1)
{
m_StartVisible = cp;
}
else if (nx2 > nx1 + (int)targetRect.Width)
{
int nXNewLeft = nx2 - (int)targetRect.Width;
int NewStart = m_TextBuffer.XtoCP(nXNewLeft);
int NewX = m_TextBuffer.CPtoX(NewStart, false);
if (NewX < nXNewLeft)
{
++NewStart;
}
m_StartVisible = NewStart;
}
int end_x = m_TextBuffer.CPtoX(m_StartVisible, false) + (int)targetRect.Width;
m_VisibleCount = m_TextBuffer.XtoCP(end_x) - m_StartVisible;
//计算新的渲染矩形
if (editBox.SelectionLength > 0)
{
int offset = m_TextBuffer.CPtoX(m_StartVisible, false);
Segment sa, sb, sc, sd, se;
sa = new Segment(0, editBox.SelectionStartIndex);
sb = new Segment(editBox.SelectionStartIndex, editBox.SelectionLength);
sc = new Segment(editBox.SelectionEndIndex, m_TextBuffer.Text.Length - editBox.SelectionEndIndex);
sd = new Segment(m_StartVisible, m_VisibleCount);
se = sd.Intersection(sa);
m_First = m_TextBuffer.Text.Substring(se.X, se.Length);
m_BeforeSelectionRect.left = targetRect.left + m_TextBuffer.CPtoX(se.X, false) - offset;
m_BeforeSelectionRect.right = targetRect.left + m_TextBuffer.CPtoX(se.Right, false) - offset;
se = sd.Intersection(sb);
m_Mid = m_TextBuffer.Text.Substring(se.X, se.Length);
m_SelectionRect.left = targetRect.left + m_TextBuffer.CPtoX(se.X, false) - offset;
m_SelectionRect.right = targetRect.left + m_TextBuffer.CPtoX(se.Right, false) - offset;
se = sd.Intersection(sc);
m_Last = m_TextBuffer.Text.Substring(se.X, se.Length);
m_AfterSelectionRect.left = targetRect.left + m_TextBuffer.CPtoX(se.X, false) - offset;
m_AfterSelectionRect.right = targetRect.left + m_TextBuffer.CPtoX(se.Right, false) - offset;
}
else
{
m_First = m_TextBuffer.Text.Substring(m_StartVisible, m_VisibleCount);
m_BeforeSelectionRect.left = this.targetRect.left;
m_BeforeSelectionRect.right = this.targetRect.right;
}
m_BeforeSelectionRect.top = this.targetRect.top; m_BeforeSelectionRect.bottom = this.targetRect.top + fontDesc.Height;
m_SelectionRect.top = this.targetRect.top; m_SelectionRect.bottom = this.targetRect.top + fontDesc.Height;
m_AfterSelectionRect.top = this.targetRect.top; m_AfterSelectionRect.bottom = this.targetRect.top + fontDesc.Height;
}
protected void OnOwnerTextSelectionChanged(object sender, WindowEventArgs e)
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
UpdateVisibleRange();
}
protected void OnOwnerCaretPositionChanged(object sender, WindowEventArgs e)
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
//重新计算可见的文本范围，基准是插入提示符必须始终在可见范围内
UpdateVisibleRange();
}
protected void OnOwnerSizeChanged(object sender, GUIEventArgs e)
{
Nexus.GUI.Widgets.UIEditBox editBox = owner as Nexus.GUI.Widgets.UIEditBox;
UpdateVisibleRange();
}
