【发布时间】：2017-08-24 03:35:47
【问题描述】：
#region CustomTabControl - Leak
public class cTabControl : TabControl
{
#region Remove Padding
protected override void WndProc(ref Message m)
{
if (m.Msg == 0x1300 + 40)
{
lparamrect rc = (lparamrect)m.GetLParam(typeof(lparamrect));
rc.Left -= 4;
rc.Right += 4;
rc.Top -= 2;
rc.Bottom += 4;
Marshal.StructureToPtr(rc, m.LParam, true);
}
base.WndProc(ref m);
}
internal struct lparamrect
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
#endregion
//Variables;
private Rectangle Rect;
private int _OverIndex = -1;
private int OverIndex
{
get { return _OverIndex; }
set
{
_OverIndex = value;
Invalidate();
}
}
//Default Settings;
public cTabControl()
{
DoubleBuffered = true;
Alignment = TabAlignment.Left;
SizeMode = TabSizeMode.Fixed;
ItemSize = new Size(30, 32);
}
protected override void OnCreateControl()
{
base.OnCreateControl();
SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
}
protected override void OnControlAdded(ControlEventArgs e)
{
base.OnControlAdded(e);
e.Control.BackColor = Settings.Default.TabBackgroundColor;
e.Control.ForeColor = ColorFromHex("#FFFFFF");
e.Control.Font = new Font("Kozuka Gothic Pro B", 9);
}
protected override void OnPaint(PaintEventArgs e)
{
//Set the Graphics Variable;
Graphics G = e.Graphics;
//Raise the Paint event;
base.OnPaint(e);
//Dynamically Darken the Parent's Color slightly;
Color DarkParentColor = default(Color);
if (ColorContrast(Parent.BackColor) == Color.White)
{
DarkParentColor = ControlPaint.Light(ControlPaint.Dark(Parent.BackColor, (float)0.01), (float)1.2);
}
else
{
DarkParentColor = ControlPaint.Light(ControlPaint.Dark(Parent.BackColor, (float)0.1), (float)0.35);
}
//Set the Tab's Background Color to the Darkened Parent's Color;
G.Clear(DarkParentColor);
//For Each Tab;
for (int i = 0; i <= TabPages.Count - 1; i++)
{
if ((string)TabPages[i].Tag != "Hidden")
{
// Get the Tab's Rectangle Sizing
Rect = GetTabRect(i);
float x = Convert.ToSingle((Rect.X + (Rect.Height - 10)) - (Rect.Height / 2));
float y = Convert.ToSingle((Rect.Y + (Rect.Height - 10)) - (Rect.Height / 2));
// If the user is hovering over the tab
if (!(OverIndex == -1))
{
using (SolidBrush sb = new SolidBrush(Color.FromArgb(9, Color.Black)))
{
//Draw the Hover Background;
G.FillRectangle(sb, new Rectangle(GetTabRect(OverIndex).X, GetTabRect(OverIndex).Y, GetTabRect(OverIndex).Width, GetTabRect(OverIndex).Height));
}
}
else
{
using (SolidBrush sb = new SolidBrush(DarkParentColor))
{
// Set the Background Color to the Darkened Parent's Color
G.FillRectangle(sb, new Rectangle(Rect.X, Rect.Y, Rect.Width + 6, Rect.Height));
}
}
// If its the selected tab
if (SelectedIndex == i)
{
using (SolidBrush sb = new SolidBrush(Settings.Default.HighlightColor), sb2 = new SolidBrush(Color.FromArgb(30, Color.Black)))
{
// Set the Selected Indicator to the Highlight Color
G.FillRectangle(sb, new Rectangle(Rect.X, Rect.Y, 2, Rect.Height));
//Draw the Hover Background;
G.FillRectangle(sb2, new Rectangle(Rect.X, Rect.Y, Rect.Width, Rect.Height));
}
}
//Set Render Quality;
G.TextRenderingHint = TextRenderingHint.AntiAlias;
if ((!ReferenceEquals(Tag, "TextOnly")))
{
if (!(SelectedIndex == i))
{
using (Graphics gfx = Graphics.FromImage(new Bitmap(GetTabIcon(i).Width, GetTabIcon(i).Height)))
{
ColorMatrix matrix = new ColorMatrix();
matrix.Matrix33 = (float)0.5;
ImageAttributes attributes = new ImageAttributes();
attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
G.DrawImage(GetTabIcon(i), new Rectangle(Convert.ToInt32(x), Convert.ToInt32(y), 20, 20), 0, 0, GetTabIcon(i).Width, GetTabIcon(i).Height, GraphicsUnit.Pixel, attributes);
}
}
else if (SelectedIndex == i)
{
using (Image ti = GetTabIcon(i))
{
G.DrawImage(ti, new Rectangle(Convert.ToInt32(x) + 1, Convert.ToInt32(y), 20, 20));
}
}
}
else
{
dynamic TabProperties = TabPages[i];
StringFormat sf = new StringFormat();
sf.LineAlignment = StringAlignment.Center;
using (Font f = new Font(LoadFont(Resources.Roboto_Medium), 10f))
using (SolidBrush sb = new SolidBrush(TabProperties.ForeColor))
{
G.DrawString(TabProperties.Text, f, sb, x + 2, Convert.ToSingle(Rect.Y + (Rect.Height / 2)), sf);
}
}
}
}
}
protected override void OnSelecting(TabControlCancelEventArgs e)
{
base.OnSelecting(e);
if ((e.TabPage != null))
{
if (!string.IsNullOrEmpty(Convert.ToString(e.TabPage.Tag)))
{
e.Cancel = true;
}
else
{
OverIndex = -1;
}
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
for (int I = 0; I <= TabPages.Count - 1; I++)
{
if (GetTabRect(I).Contains(e.Location) & string.IsNullOrEmpty(Convert.ToString(TabPages[I].Tag)))
{
OverIndex = I;
break; // TODO: might not be correct. Was : Exit For
}
else
{
OverIndex = -1;
}
}
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
OverIndex = -1;
}
}
#endregion
我有这个更现代的自定义选项卡控件类，它是左对齐而不是顶部对齐。它可以工作，但是存在巨大的内存泄漏问题。我正在使用MouseMove 来获取鼠标位置，然后将其与选项卡交叉匹配，但即使我将鼠标保持不动或移动到选项卡的中间位置，它显然会执行数百万有时，这会导致内存使用量激增。
有没有办法解决这个问题？
【问题讨论】：
标签： c# memory memory-management memory-leaks