以前在CNBLOGS.COM上看到有位朋友也用GDI+做过报表设计器,但我已经不记得是哪位了
希望这们朋友看到后能留个言,我有很多东西想请教一下,
这个程序是完全用GDI+来完成的,但最大的麻烦是我不能很好的安排整体的PAINT事件,
不论是画在IMAGE上或是直接画在容器中,都会有很严重的闪烁,
这个东西只是一个自己的测试,最终的目的还是为了做出一个类似VB6的窗体设计器,
在现在的设计器中包括了
FocusBox对象选择框
ReportDesigner基于Panel的设计容器
RpUIComponent所有设计对象的基础类，类似于System.Windows.Forms.Control类
RpLabel基于RpUIComponent的标签对象
目前这个东西支持自定义组件的扩展,也就是可以重RpUIComponent中派生出自定义组件，当然现在的功能还是很弱的，
源码下载地址：https://files.cnblogs.com/pvistely/GdiDsg.rar
希望大家指点一下，有怎么样更好的进行GDI画图的方法或模式，
哈，意外发现，把FocusBox类处理一下就可以直接与一般控件使用，而且效果不错，嘿嘿嘿，意外呀～～～～
public class FocusBox
{
Control mBindCtrl = null; Graphics mDrawGrp = null; Control mParent = null; Rectangle[] mDot = new Rectangle[9]; bool mMouseD = false; bool mInRact = false; Rectangle mClientRect = new Rectangle();
Cursor[] mDotCur ={ 
Cursor[] mDotCur Cursors.SizeAll, Cursors.SizeNWSE, Cursors.SizeNS, Cursors.SizeNESW, Cursors.SizeWE, Cursors.SizeWE, Cursors.SizeNESW, Cursors.SizeNS, Cursors.SizeNWSE 
}; int mCurPos = -1; Point mMDPos = new Point(0, 0); public FocusBox(Control pRd, Control pBindCtrl) { mParent = pRd; mBindCtrl = pBindCtrl; mDrawGrp = Graphics.FromHwnd(pRd.Handle); mParent.Paint += new PaintEventHandler(mParent_Paint); mParent.MouseMove += new MouseEventHandler(mParent_MouseMove); mParent.MouseDown += new MouseEventHandler(mParent_MouseDown); mParent.MouseUp += new MouseEventHandler(mParent_MouseUp); mClientRect = pBindCtrl.ClientRectangle; DrawFocus(); } void mParent_MouseUp(object sender, MouseEventArgs e) { mMDPos = new Point(0, 0); mCurPos = -1; mMouseD = false; } void mParent_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { mMDPos = e.Location; mMouseD = true; } } void mParent_MouseMove(object sender, MouseEventArgs e) { if (!mMouseD) { mParent.Cursor = Cursors.Default; mInRact = (new Rectangle(mDot[1].Left, mDot[1].Top, mDot[8].Right, mDot[8].Bottom)).Contains(e.Location); if (mInRact) { mParent.Cursor = Cursors.SizeAll; mCurPos = 0; } for (int i = 1; i < 9; i++) { if (mDot[i].Contains(e.Location)) { mParent.Cursor = mDotCur[i]; mCurPos = i; } } } if (mCurPos == -1) return; Rectangle tmpRect = new Rectangle(); ////tmpRect.Size = mClientRect.Size; ////tmpRect.Location = mClientRect.Location; tmpRect.Size = mBindCtrl.Size; tmpRect.Location = mBindCtrl.Location; Point changed = CalcSize(mDot[mCurPos].Location, e.Location); changed = CalcSize(mMDPos, e.Location); if (mMouseD) { switch (mCurPos) { case 0: tmpRect.Location = tmpRect.Location + (new Size(changed.X, changed.Y)); break; case 1: tmpRect.Location = tmpRect.Location + (new Size(changed.X, changed.Y)); tmpRect.Size = tmpRect.Size + (new Size(changed.X * (-1), changed.Y * (-1))); break; case 2: tmpRect.Location = tmpRect.Location + (new Size(0, changed.Y)); tmpRect.Size = tmpRect.Size + (new Size(0, changed.Y * (-1))); break; case 3: tmpRect.Location = tmpRect.Location + (new Size(0, changed.Y)); tmpRect.Size = tmpRect.Size + (new Size(changed.X, changed.Y * -1)); break; case 4: tmpRect.Location = tmpRect.Location + (new Size(changed.X, 0)); tmpRect.Size = tmpRect.Size + (new Size(changed.X * -1, 0)); break; case 5: tmpRect.Size = tmpRect.Size + (new Size(changed.X, 0)); break; case 6: tmpRect.Location = tmpRect.Location + (new Size(changed.X, 0)); tmpRect.Size = tmpRect.Size + (new Size(changed.X * -1, changed.Y)); break; case 7: tmpRect.Size = tmpRect.Size + (new Size(0, changed.Y)); break; case 8: tmpRect.Size = tmpRect.Size + (new Size(changed.X, changed.Y)); break; } } mMDPos = e.Location; if (mBindCtrl.Location == tmpRect.Location && mBindCtrl.Size == tmpRect.Size) return; mBindCtrl.Location = tmpRect.Location; mBindCtrl.Size = tmpRect.Size; ////mClientRect.Location = tmpRect.Location; ////mClientRect.Size = tmpRect.Size; DrawFocus(); mParent.Refresh(); } void mParent_Paint(object sender, PaintEventArgs e) { //mParent.DrawGraphic.Clear(Color.White); DrawFocus(); } Point CalcSize(Point po1, Point po2) { Point s = new Point(); s.X = po2.X - po1.X; s.Y = po2.Y - po1.Y; return s; } void DrawFocus() { ////Rectangle tmpFocusRect = new Rectangle(mClientRect.Location - new Size(3, 3), mClientRect.Size + new Size(6, 6)); Rectangle tmpFocusRect = new Rectangle(mBindCtrl.Location - new Size(3, 3), mBindCtrl.Size + new Size(6, 6)); //Bitmap tmpBmp = new Bitmap(mBindCtrl.Size.Width + 14, mBindCtrl.Size.Height + 14, System.Drawing.Imaging.PixelFormat.Format64bppPArgb); //mImg = Image.FromHbitmap(tmpBmp.GetHbitmap()); //Graphics g = Graphics.FromImage(mImg); //ControlPaint.DrawFocusRectangle(g, tmpFocusRect); ControlPaint.DrawFocusRectangle(mDrawGrp, tmpFocusRect); mDot[1].Location = mBindCtrl.Location - new Size(7, 7); //mDot[1].Location = new Point(0, 0); mDot[2].Location = mDot[1].Location + new Size(mBindCtrl.Width / 2 + 4, 0); mDot[3].Location = mDot[1].Location + new Size(mBindCtrl.Width + 7, 0); mDot[4].Location = mDot[1].Location + new Size(0, mBindCtrl.Height / 2 + 4); mDot[5].Location = mDot[1].Location + new Size(mBindCtrl.Width + 7, mBindCtrl.Height / 2 + 4); mDot[6].Location = mDot[1].Location + new Size(0, mBindCtrl.Height + 7); mDot[7].Location = mDot[1].Location + new Size(mBindCtrl.Width / 2 + 4, mBindCtrl.Height + 7); mDot[8].Location = mDot[1].Location + new Size(mBindCtrl.Width + 7, mBindCtrl.Height + 7); for (int i = 1; i <= 8; i++) { mDot[i].Size = new Size(6, 6); mDrawGrp.FillRectangle(new SolidBrush(SystemColors.Highlight), mDot[i]); mDrawGrp.DrawRectangle(new Pen(SystemColors.HighlightText), mDot[i]); //g.FillRectangle(new SolidBrush(SystemColors.Highlight), mDot[i]); //g.DrawRectangle(new Pen(SystemColors.HighlightText), mDot[i]); } //mDrawGrp.DrawImage(mImg,mBindCtrl.Location-new Size(7,7)); } void DrawControl() { } ~FocusBox() { mBindCtrl = null; mDrawGrp = null; if (mParent != null) mParent.Paint -= mParent_Paint; mParent = null; } public void Dispose() { mParent.Cursor = Cursors.Default; mBindCtrl = null; mDrawGrp = null; mParent.Paint -= mParent_Paint; mParent.MouseMove -= mParent_MouseMove; mParent.MouseUp -= mParent_MouseUp; mParent.MouseDown -= mParent_MouseDown; mParent = null; }
}