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MyEdit.cs
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using System;
using System.Windows.Forms;
using System.Drawing;
namespace DigitalPlatform.Xml
{
//派生的TextBox
public class MyEdit : TextBox
{
public XmlEditor XmlEditor = null;
// 初始化小编辑控件
// parameters:
// xmlEditor XmlEditor对象
// return:
// -1 出错
// 0 成功
public int Initial(XmlEditor xmlEditor,
out string strError)
{
strError = "";
this.XmlEditor = xmlEditor;
this.ImeMode = ImeMode.Off;
this.BorderStyle = BorderStyle.None;
this.BackColor = this.XmlEditor.BackColorDefaultForEditable;
this.Font = this.XmlEditor.FontTextDefault;
this.Multiline = true;
this.XmlEditor.Controls.Add(this);
return 0;
}
// 接管Ctrl+各种键
protected override bool ProcessDialogKey(
Keys keyData)
{
// Ctrl + A 自动录入功能
if ((keyData & Keys.Control) == Keys.Control
&& (keyData & (~Keys.Control)) == Keys.A) // 2007/5/15 修改，原来的行是CTRL+C和CTRL+A都起作用，CTRL+C是副作用。
// && (keyData & Keys.A) == Keys.A)
{
if (this.XmlEditor != null)
{
GenerateDataEventArgs ea = new GenerateDataEventArgs();
this.XmlEditor.OnGenerateData(ea);
return true;
}
}
return false;
}
// 鼠标卷滚时
protected override void OnMouseWheel(MouseEventArgs e)
{
this.XmlEditor.MyOnMouseWheel(e);
}
// 获得焦点
protected override void OnGotFocus(EventArgs e)
{
base.OnGotFocus(e);
this.XmlEditor.Enabled = true;
}
// 失去焦点
protected override void OnLostFocus(EventArgs e)
{
this.XmlEditor.Flush();
base.OnLostFocus(e);
}
// 解决上移下移
// 当光标移到文字顶时，再向上移则移到上一个Item
// 当光标移到文字底时，再向下移则移到下一个Item
protected override void OnKeyDown(KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Up:
{
// 当光标移到文字顶时，再向上移则移到上一个Item
// 得到Edit的插入符位置
int x, y;
API.GetEditCurrentCaretPos(this,
out x,
out y);
// 如果位置为0
if (y == 0)
{
POINT point = new POINT();
point.x = 0;
point.y = 0;
bool bRet = API.GetCaretPos(ref point); //得到插入符
// 得到当前的Item的上一个Item
Item frontItem = ItemUtil.GetNearItem(this.XmlEditor.m_selectedItem,
MoveMember.Front);
if (frontItem != null)
{
// 设为当前的Item
//this.m_selectedItem = frontItem;
this.XmlEditor.SetCurText(frontItem, null);
this.XmlEditor.SetActiveItem(frontItem);
if (this.XmlEditor.m_curText != null)
{
// 手工单击一下，确保移动到对应的位置
point.y = this.ClientSize.Height - 2;
API.SendMessage(this.Handle,
API.WM_LBUTTONDOWN,
new UIntPtr(API.MK_LBUTTON), // UIntPtr wParam,
API.MakeLParam(point.x, point.y));
API.SendMessage(this.Handle,
API.WM_LBUTTONUP,
new UIntPtr(API.MK_LBUTTON), // UIntPtr wParam,
API.MakeLParam(point.x, point.y));
}
e.Handled = true;
this.XmlEditor.Invalidate();
}
}
}
break;
case Keys.Down:
{
// 当光标移到文字底时，再向下移则移到下一个Item
int x, y;
API.GetEditCurrentCaretPos(this,
out x,
out y);
// 得到当前edit的行号
int nTemp = API.GetEditLines(this);
// 不是根元素
if (y >= nTemp - 1 && (!(this.XmlEditor.m_selectedItem is VirtualRootItem)))
{
POINT point = new POINT();
point.x = 0;
point.y = 0;
bool bRet = API.GetCaretPos(ref point);
// 得到下一个Item
Item behindItem = ItemUtil.GetNearItem(this.XmlEditor.m_selectedItem,
MoveMember.Behind);
if (behindItem != null)
{
//this.m_selectedItem = behindItem;
this.XmlEditor.SetCurText(behindItem, null);
this.XmlEditor.SetActiveItem(behindItem);
if (this.XmlEditor.m_curText != null)
{
// 模拟单击一下
point.y = 1;
API.SendMessage(this.Handle,
API.WM_LBUTTONDOWN,
new UIntPtr(API.MK_LBUTTON), // UIntPtr wParam,
API.MakeLParam(point.x, point.y));
API.SendMessage(this.Handle,
API.WM_LBUTTONUP,
new UIntPtr(API.MK_LBUTTON), // UIntPtr wParam,
API.MakeLParam(point.x, point.y));
}
e.Handled = true;
this.XmlEditor.Invalidate();
}
}
}
break;
case Keys.Left:
break;
case Keys.Right:
break;
default:
break;
}
}
// 把文字大于输入框时，把输入框变大
protected override void OnKeyUp(KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Left:
case Keys.Right:
case Keys.Up:
case Keys.Down:
break;
default:
{
bool bChanged = false;
//解决Edit随着文字变大的问题
API.SendMessage(this.Handle,
API.EM_LINESCROLL,
0,
(int)1000);
while (true)
{
int nFirstLine = API.GetEditFirstVisibleLine(this); //得到edit可见的第一行
if (nFirstLine != 0) //不等于0，表明变大了
{
bChanged = true;
this.Size = new Size(this.Size.Width,
this.Size.Height + 10);
}
else
{
break;
}
}
if (bChanged)
{
this.AfterEditControlHeightChanged(this.XmlEditor.m_curText);
}
}
break;
}
}
// edit高度发生变化
private void AfterEditControlHeightChanged(Visual visual)
{
if (visual == null)
return;
int nOldHeight = 0;
nOldHeight = visual.Rect.Height;
//把文字送入item
// ??????引向未完整的数据变成xml，抛出错误
//this.EditControlTextToVisual();
//重新计算
int nRetWidth, nRetHeight;
visual.Layout(visual.Rect.X,
visual.Rect.Y,
visual.Rect.Width,
this.Size.Height,// + visual.TopBlank + visual.BottomBlank + 2*visual.BorderHorzHeight ,//visual.rect .Height ,
this.XmlEditor.nTimeStampSeed++,
out nRetWidth,
out nRetHeight,
LayoutMember.Layout);
// ???????设当前edit的大小及位置
int nNewHeight = visual.Rect.Height;
int nDelta = nNewHeight - nOldHeight;
if (nDelta != 0)
{
//上级
Visual containerVisual = visual.container;
nNewHeight += containerVisual.TotalRestHeight;
if (containerVisual != null)
{
containerVisual.Layout(containerVisual.Rect.X,
containerVisual.Rect.Y,
containerVisual.Rect.Width,
nNewHeight,
this.XmlEditor.nTimeStampSeed,
out nRetWidth,
out nRetHeight,
LayoutMember.EnLargeHeight | LayoutMember.Up);
}
//Visual.ChangeSibling (visual,-1,nNewHeight);
}
if (nDelta != 0
&& this.XmlEditor.m_curText != null)
{
//这里优先，使用ScrollWindowEx
}
if (nDelta != 0)
{
this.XmlEditor.AfterDocumentChanged(ScrollBarMember.Vert);
}
this.XmlEditor.Invalidate();
//也需要做优化的事情
}
}
}