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STTextBox.MouseEvent.cs

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Drawing;

namespace ST.Library.UI.STTextBox

{

partial class STTextBox

{

private struct ScrollIncrement

{

public int Time;

public int Value;

public ScrollIncrement(int nTime, int nValue) {

this.Time = nTime;

this.Value = nValue;

}

private DateTime m_dt_last_scroll_h = DateTime.Now;

private DateTime m_dt_last_scroll_v = DateTime.Now;

private ScrollIncrement[] m_arr_si = new ScrollIncrement[]{

new ScrollIncrement(20, 6),

new ScrollIncrement(30, 5),

new ScrollIncrement(40, 4),

new ScrollIncrement(50, 3),

new ScrollIncrement(60, 2),

};

protected override void OnMouseDown(MouseEventArgs e) {

base.OnMouseDown(e);

var c = m_core;

this.Select();

if (c.Scroll.HoverScrollBar != STTextBoxScrollInfo.ScrollBarType.None) {

if (c.Scroll.HBackRect.Contains(e.Location)) {

c.Scroll.DownScrollBar = STTextBoxScrollInfo.ScrollBarType.H;

c.ITextView.ScrollXToMuosePoint(e.X);

this.Invalidate();

} else if (c.Scroll.VBackRect.Contains(e.Location)) {

c.Scroll.DownScrollBar = STTextBoxScrollInfo.ScrollBarType.V;

c.ITextView.ScrollYToMousePoint(e.Y);

this.Invalidate();

}

return;

}

m_last_sel_region = Rectangle.Empty;

var fi = c.ITextView.SetCaretPostion(e.Location);// c.ITextView.FindFromPoint(e.Location);

//c.Caret.CopyFromFindInfo(fi);

if (Control.ModifierKeys != Keys.Shift) {

c.Selection.SetIndex(c.Caret.IndexOfChar);

} else {

c.Selection.SetSelection(c.Selection.AnchorIndex, c.Caret.IndexOfChar);

}

this.Invalidate();

}

private Rectangle m_last_sel_region = Rectangle.Empty;

public void InvalidateSelectionPixelYChange(int oldY, int newY) {

var c = m_core;

int minY = Math.Min(oldY, newY);

int maxY = Math.Max(oldY, newY);

int lineHeight = c.LineHeight;

int spacing = c.TextBox.GetIntYSize(c.TextBox.LineSpacing);

int startY = minY - 2;

int height = (maxY - minY) + lineHeight + spacing + 4;

startY = Math.Max(c.ViewRectangle.Top, startY);

height = Math.Min(height, c.ViewRectangle.Bottom - startY);

if (height <= 0) {

this.Invalidate();

return;

}

Rectangle rect = new Rectangle(c.ViewRectangle.Left, startY, c.ViewRectangle.Width, height);

if (!m_last_sel_region.IsEmpty) {

rect = Rectangle.Union(m_last_sel_region, rect);

}

m_last_sel_region = rect;

this.Invalidate(rect);

}

public void InvalidateSelectionChange(int oldLine, int newLine) {

var c = m_core;

if (c.ITextView is WrapTextView) {

var m = c.TextManager;

int screenStart = c.ViewRectangle.Top;

int screenEnd = c.ViewRectangle.Bottom;

int minLine = Math.Min(oldLine, newLine);

int maxLine = Math.Max(oldLine, newLine);

if (minLine >= 0 && minLine < m.LineCount) {

var fi = c.ITextView.FindFromCharIndex(m[minLine].IndexOfFirstChar);

if (fi.Find) screenStart = fi.Location.Y;

}

if (maxLine >= 0 && maxLine < m.LineCount) {

var fi = c.ITextView.FindFromCharIndex(m[maxLine].IndexOfFirstChar + m[maxLine].RawString.Length);

if (fi.Find) screenEnd = fi.Location.Y + c.LineHeight;

}

InvalidateSelectionPixelYChange(screenStart, screenEnd);

return;

}

int minL = Math.Min(oldLine, newLine);

int maxL = Math.Max(oldLine, newLine);

int lineHeight = c.LineHeight;

Point ptTop = c.ITextView.ViewToControl(new Point(0, minL * lineHeight));

int startY = ptTop.Y - 2;

int spacing = c.TextBox.GetIntYSize(c.TextBox.LineSpacing);

int height = ((maxL - minL + 1) * lineHeight) + spacing + 4;

startY = Math.Max(c.ViewRectangle.Top, startY);

height = Math.Min(height, c.ViewRectangle.Bottom - startY);

if (height <= 0) {

this.Invalidate();

return;

}

Rectangle rect = new Rectangle(c.ViewRectangle.Left, startY, c.ViewRectangle.Width, height);

if (!m_last_sel_region.IsEmpty) {

rect = Rectangle.Union(m_last_sel_region, rect);

}

m_last_sel_region = rect;

this.Invalidate(rect);

}

protected override void OnMouseMove(MouseEventArgs e) {

base.OnMouseMove(e);

var c = m_core;

switch (c.Scroll.DownScrollBar) {

case STTextBoxScrollInfo.ScrollBarType.V:

c.ITextView.ScrollYToMousePoint(e.Y);

this.Invalidate();

return;

case STTextBoxScrollInfo.ScrollBarType.H:

c.ITextView.ScrollXToMuosePoint(e.X);

this.Invalidate();

return;

}

if (e.Button == System.Windows.Forms.MouseButtons.Left) {

int oldCaretY = c.Caret.Y;

var fi = c.ITextView.SetCaretPostion(e.Location);

if (!fi.Find) return;

int nIndex = c.Caret.IndexOfChar;

c.Selection.SetSelection(c.Selection.AnchorIndex, nIndex);

bool scrolled = c.ITextView.ScrollToCaret();

if (scrolled) {

m_last_sel_region = Rectangle.Empty;

this.Invalidate();

} else {

this.InvalidateSelectionPixelYChange(oldCaretY, c.Caret.Y);

}

return;

}

if (e.Button == MouseButtons.None && c.Scroll.CountDown != 0) {

if (c.Scroll.VBackRect.Contains(e.Location)) {

c.Scroll.HoverScrollBar = STTextBoxScrollInfo.ScrollBarType.V;

} else if (c.Scroll.HBackRect.Contains(e.Location)) {

c.Scroll.HoverScrollBar = STTextBoxScrollInfo.ScrollBarType.H;

} else {

c.Scroll.HoverScrollBar = STTextBoxScrollInfo.ScrollBarType.None;

}

if (c.Scroll.HoverScrollBar != STTextBoxScrollInfo.ScrollBarType.None) {

this.ShowScrollBar(c.Scroll.DisplayTime);

if (this.SetCursor(Cursors.Arrow)) {

this.Invalidate();

}

} else {

if (this.SetCursor(Cursors.IBeam)) {

this.Invalidate();

}

} else {

c.ITextView.OnSetCursor(e);

}

protected override void OnMouseUp(MouseEventArgs e) {

base.OnMouseUp(e);

m_last_sel_region = Rectangle.Empty;

var c = m_core;

c.Scroll.DownScrollBar = STTextBoxScrollInfo.ScrollBarType.None;

this.Invalidate();

}

protected override void OnMouseLeave(EventArgs e) {

base.OnMouseLeave(e);

var c = m_core;

c.Scroll.HoverScrollBar = STTextBoxScrollInfo.ScrollBarType.None;

}

protected override void OnMouseWheel(MouseEventArgs e) {

base.OnMouseWheel(e);

DateTime dt_now = DateTime.Now;

//Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_v).TotalMilliseconds);

int nIncrement = 1;

int nTemp = (int)dt_now.Subtract(m_dt_last_scroll_v).TotalMilliseconds;

foreach (var v in m_arr_si) {

if (nTemp < v.Time) {

nIncrement = v.Value;

break;

}

m_dt_last_scroll_v = dt_now;

var c = m_core;

if (e.Delta > 0) {

if (c.Scroll.YValue <= 0) return;

if (c.Scroll.YValue - nIncrement < 0) {

nIncrement = c.Scroll.YValue;

}

c.Scroll.YValue -= nIncrement;

c.Caret.Y += nIncrement * c.LineHeight;// this.Font.Height;

} else {

if (c.Scroll.YValue >= c.Scroll.MaxYValue) {

return;

}

if (c.Scroll.YValue + nIncrement > c.Scroll.MaxYValue) {

nIncrement = c.Scroll.MaxYValue - c.Scroll.YValue;

}

c.Scroll.YValue += nIncrement;

c.Caret.Y -= c.LineHeight * nIncrement;// c.ITextRender.GetFontHeight();

}

c.ITextView.SetCaretPostion(c.Caret.IndexOfChar);

//c.ITextView.SetCaretPostion(c.Caret.X, c.Caret.Y);

this.ShowScrollBar(c.Scroll.DisplayTime);

this.Invalidate();

//c.Scroll.Timer = 5;

}

protected virtual void OnMouseHWheel(MouseEventArgs e) {

DateTime dt_now = DateTime.Now;

//Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_h).TotalMilliseconds);

int nIncrement = 1;

int nTemp = (int)dt_now.Subtract(m_dt_last_scroll_h).TotalMilliseconds;

foreach (var v in m_arr_si) {

if (nTemp < v.Time) {

nIncrement = v.Value;

break;

}

m_dt_last_scroll_h = dt_now;

var c = m_core;

if (e.Delta < 0) {

if (c.Scroll.XValue <= 0) return;

if (c.Scroll.XValue - nIncrement < 0) {

nIncrement = c.Scroll.XValue;

}

c.Scroll.XValue -= nIncrement;

c.Caret.X += c.Scroll.XIncrement * nIncrement;

} else {

if (c.Scroll.XValue >= c.Scroll.MaxXValue) {

return;

}

if (c.Scroll.XValue + nIncrement > c.Scroll.MaxXValue) {

nIncrement = c.Scroll.MaxXValue - c.Scroll.XValue;

}

c.Scroll.XValue += nIncrement;

c.Caret.X -= c.Scroll.XIncrement * nIncrement;

}

//c.ITextView.SetCaretPostion(c.Caret.X, c.Caret.Y);

c.ITextView.SetCaretPostion(c.Caret.IndexOfChar);

this.ShowScrollBar(c.Scroll.DisplayTime);

this.Invalidate();

//c.Scroll.Timer = 5;

}

protected override void OnMouseDoubleClick(MouseEventArgs e) {

base.OnMouseDoubleClick(e);

var c = m_core;

var fi = c.ITextView.FindFromPoint(e.Location);

int nIndex = fi.IndexOfChar - fi.Line.IndexOfFirstChar;

int nSelectionStart = fi.IndexOfChar, nSelectionLen = 0;

c.IWordSplitter.Each(fi.Line.RawString, (str, nStart, nLen) => {

if (nIndex >= nStart && nIndex < nStart + nLen) {

switch (str[nStart]) {

case '\r':

case '\n':

return false;

}

nSelectionStart = fi.Line.IndexOfFirstChar + nStart;

nSelectionLen = nLen;

return false;

}

nSelectionStart = fi.Line.IndexOfFirstChar + nStart;

nSelectionLen = nLen;

return true;

});

c.Selection.SetSelection(nSelectionStart, nSelectionStart + nSelectionLen);

c.Caret.IndexOfChar = c.Selection.EndIndex;

c.ITextView.SetCaretPostion(c.Caret.IndexOfChar);

this.Invalidate();

}