Tabcontrol Custom
Publicado por Luis Eduardo (1 intervención) el 28/01/2020 14:48:08
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using System;
using System.Diagnostics;using System.Collections;using System.Drawing;using System.Data;using System.Windows.Forms;
namespace UI.Controls{ /// /// Summary description for DisableTabControl. /// use DisableTabControl, you can really disable individual TabPage by /// setting Enabled property to false(you cannot switch to dimmed page by mouse /// or key board unless the current selected page is dimmed). usage: /// 1. add reference Control.dll or the Control project /// 2. using DigitalLab.UI.Controls /// 3. Design your form /// 4. find the variable name of your TabControl(Declaration and /// initizlization) /// 4.1 private System.Windows.Forms.TabControl tabControl1; ==> /// private DigitalLab.UI.DisableTabControl tabControl1; /// 4.2 in InitializeComponent() /// tabControl1 = new System.Windows.Forms.TabControl(); ==> /// tabControl1 = new DigitalLab.UI.Controls.DisableTabControl() ==> /// 5. Switch to form designer /// 5.1 set the Porperty DrawMode to OwnerDrawFixed /// 5.2 add an handler to the event DrawItem /// add the following code to the event handler: /// tabControl1.DisableTabControl_DrawItem(sender,e); /// 6 Enable/Disable a tabpage by /// EnableDisablePage(tabpage, true/false) ///public class DisableTabControl : System.Windows.Forms.TabControl
{public DisableTabControl()
{ }protected override void WndProc(ref Message m)
{try
{ const int WM_LBUTTONDOWN = 0x201;if( m.Msg == WM_LBUTTONDOWN )
{Point pt = new Point( (int)m.LParam );
for(int index = 0; index < base.TabPages.Count; index++)
{if( GetTabRect(index).Contains(pt) )
{if (TabPages[index].Enabled == true)
{base.WndProc(ref m);
}return;
} } }base.WndProc (ref m);
}catch(Exception ex)
{Debug.Assert(false, ex.ToString() );
} }protected override void OnKeyDown(KeyEventArgs e)
{int currentIndex = this.SelectedIndex;
try
{if( e.KeyCode == Keys.Left && !(e.Alt && !e.Control ) )
{ int rewind = 0;int i = currentIndex-1;
if( i == -1) i = TabPages.Count -1;
for(; rewind < 2 && i >= 0; i--)
{if( TabPages[i].Enabled )
{this.SelectedIndex = i;
break;
}if( i == 0 )
{rewind++;
i = TabPages.Count;
} }e.Handled = true;
}else if(e.KeyCode == Keys.Right && !(e.Alt && !e.Control) )
{ int rewind = 0;int i = currentIndex + 1;
if( i == TabPages.Count) i = 0;
for(; rewind < 2 && i < TabPages.Count; i++)
{if( TabPages[i].Enabled )
{this.SelectedIndex = i;
break;
}if( i == TabPages.Count - 1)
{rewind ++;
i = -1;
} }e.Handled = true;
}else if( (e.KeyCode == Keys.Up || e.KeyCode == Keys.Down) &&
!(e.Alt && !e.Control) )
{if(this.Multiline == false)
{e.Handled = false;
base.OnKeyDown (e);
return;
}int targetIdx = -1;
Rectangle curr_rect = GetTabRect(currentIndex);
for(int i = 0; i < TabPages.Count; i++)
{if( i == currentIndex) continue;
if( curr_rect.Contains(GetTabRect(i).X, curr_rect.Y) )
{ targetIdx = i;break;
} }if( targetIdx != -1 && TabPages[targetIdx].Enabled == true)
{this.SelectedIndex = targetIdx;
}e.Handled = true;
}base.OnKeyDown (e);
}catch(Exception ex)
{Debug.Assert(false, ex.ToString() );
} } /// /// you can also use tabPage.Enabled = false; tabControl.Refresh() directly /// this method just give you a way to ignore Refresh(); /// ///public void EnableDisablePage(TabPage pTabPage, bool enable )
{bool curr_enable = pTabPage.Enabled ;
pTabPage.Enabled = enable;
if( curr_enable != enable)
this.Refresh();
}public void DisableTabControl_DrawItem(object sender , System.Windows.Forms.DrawItemEventArgs e)
{try
{int intOffsetLeft ;
int intOffsetTop ;
RectangleF r = RectangleF.op_Implicit(e.Bounds);
RectangleF r2;
SolidBrush ItemBrush = new SolidBrush(this.BackColor);
Brush b = null;if( this.TabPages[e.Index].Enabled )
b = Brushes.Black;
else
b = Brushes.Gray;
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
Bitmap im = null;if(this.TabPages[e.Index].ImageIndex != -1 )
{im = this.ImageList.Images[this.TabPages[e.Index].ImageIndex] as Bitmap;
}if(this.TabPages[e.Index].ImageIndex != -1 )
r2 = new RectangleF(r.X + (im.Width / 2), r.Y, r.Width, r.Height);
else
r2 = new RectangleF(r.X, r.Y, r.Width, r.Height);
if( (int)(e.State & DrawItemState.Selected) != 0 )
{e.Graphics.FillRectangle(ItemBrush, e.Bounds);
e.Graphics.DrawString(this.TabPages[e.Index].Text, e.Font, b, r2, sf);
//e.Graphics.DrawString(this.TabPages[e.Index].Text, e.Font, Brushes.Red, r2, sf); intOffsetLeft = 5; intOffsetTop = 5 ; }else
{e.Graphics.DrawString(this.TabPages[e.Index].Text, e.Font, b, r2, sf);
//e.Graphics.DrawString(this.TabPages[e.Index].Text, e.Font, Brushes.Blue, r2, sf); intOffsetLeft = 2; intOffsetTop = 2 ; }if(this.TabPages[e.Index].ImageIndex != -1 )
{this.ImageList.Draw(e.Graphics, Convert.ToInt32(r.Left) +
intOffsetLeft, Convert.ToInt32(r.Top) + intOffsetTop,
this.TabPages[e.Index].ImageIndex);
} }catch(Exception ex)
{Debug.Assert(false, ex.ToString() );
} } }}Valora esta pregunta
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