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.Net Mirco Framework 2007技术大会
.Net Mirco Framework 2007技术大会
2006年在《程序员》杂志上通过看马宁的专栏文章,第一次知道了.Net MF。一年后的今天终于近距离地接触了.Net Mirco Frmaework,对MF有了一定的感性认识。
最近公司很多项目都有大量嵌入式设备使用,由于WinCE系统相对较大,对硬件平台要求过高,所以对.Net MF一直比较关注。今天总算大开眼界了。
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微软公司的Colin Miller和Digi公司的John Leier在上午的演讲拉开了.Net MF序幕,针对嵌入式领域,一个从软件角度进行阐述,另一个从硬件平台角度进行呼应,一软一硬,二者强强联合,恐怕未来嵌入式智能设备一半以上的项目开发要被其收入囊中了。下午的中文演讲给人感觉有些干瘪,两三个演讲,平均短短十几分钟就草草收场。后来微软公司杜伟的演讲,从VS2005一行行难以看清的代码,到一个个令人惊艳的样例把MF开发技术推向最前台。
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Digi公司很是有魄力,免费送出15套开发套件(5个作为回答问题的奖品,10个抽奖),自己即没有回答问题的勇气,也没有好的运气,只好剩下羡慕的份了。
最后为每个人送出的<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1" unitname="g"><span lang="EN-US"><font face="Times New Roman">1G</font></span></chmetcnv>优盘(类似微软今年MVP大礼包中的优盘)很有分量,不仅是<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1" unitname="g"><span lang="EN-US"><font face="Times New Roman">1G</font></span></chmetcnv>的容量,并且里面竟然把所有的幻灯片拷贝其中,更没有想到的是,MF 的SDK也在里面,真棒!
回到家迫不及待装了一份MF SDK(MicroFrameworkSDK.MSI 区区只有5998 kb,强!),有模拟器,也有示例。
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其中几个示例不知道为什么编译成功,就是运行失败,对第二示例比较感兴趣,可以绘制图形,并且可以贴图。
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相关代码如下:
usingSystem;
usingSystem.Collections;
usingSystem.Threading;
usingMicrosoft.SPOT;
usingMicrosoft.SPOT.Input;
usingMicrosoft.SPOT.Hardware;
usingMicrosoft.SPOT.Presentation;
usingMicrosoft.SPOT.Presentation.Media;
usingMicrosoft.SPOT.Presentation.Controls;
usingMicrosoft.SPOT.Presentation.Shapes;
usingPresentationDemo;
/**///////////////////////////////////////////////////////////////////////////////
publicsealedclassMyApp:Application...{
//ThisstaticfieldpreventstheobjectfrombeingGC'd
privatestaticGpioButtonInputProviders_gpioInputProvider;
publicFontNinaBFont;
publicFontSmallFont;
publicBitmapSnowflake;
privateMyApp()...{
//InitializetheButtons/Pinsdispatcher
s_gpioInputProvider=newGpioButtonInputProvider(this.Dispatcher,null);
//Loadsomeresources
NinaBFont=Resources.GetFont(Resources.FontResources.NinaBFont);
SmallFont=Resources.GetFont(Resources.FontResources.SmallFont);
Snowflake=Resources.GetBitmap(Resources.BitmapResources.Snowflake);
}
protectedoverridevoidOnStartup(EventArgse)...{
//Createandsettheapplication'smainwindow
this.MainWindow=newMainMenuWindow(this);
base.OnStartup(e);
}
publicvoidGoHome()...{
Buttons.Focus(this.MainWindow);//Setfocusbacktothemainwindow
}
publicstaticvoidMain()...{
newMyApp().Run();//Starttheapp'smainwindow
}
}
/**///////////////////////////////////////////////////////////////////////////////
//Thisisthebaseclassofallourwindows;itmakeseverywindowvisible,
//setsthewindow'ssizetothefullsizeoftheLCD,andgivethewindowfocus
internalclassPresentationWindow:Window...{
protectedMyAppm_app;
protectedPresentationWindow(MyAppapp)...{
m_app=app;
//MakethewindowvisibleandthesizeoftheLCD
this.Visibility=Visibility.Visible;
this.Width=SystemMetrics.ScreenWidth;
this.Height=SystemMetrics.ScreenHeight;
Buttons.Focus(this);//Setfocustothiswindow
}
protectedoverridevoidOnButtonDown(ButtonEventArgse)...{
//RemovethiswindowformtheWindowManager
this.Close();
//Whenanybuttonispressed,gobacktotheHomepage
m_app.GoHome();
}
}
/**///////////////////////////////////////////////////////////////////////////////
internalsealedclassMainMenuWindow:PresentationWindow...{
privateListBoxm_listbox;
publicListBoxMainListBox...{get...{returnm_listbox;}}
publicMainMenuWindow(MyAppapp)
:base(app)...{
ColorinstructionTextColor=ColorUtility.ColorFromRGB(192,192,192);
ColorbackgroundColor=ColorUtility.ColorFromRGB(26,118,183);
ColorunselectedItemColor=ColorUtility.ColorFromRGB(192,192,255);//Unselectedlistboxitemcolor
ColorselectedItemColor=Colors.White;//Selectedlistboxitemcolor
//TheMainwindowcontainsaveritcalStackPanel
StackPanelpanel=newStackPanel(Orientation.Vertical);
this.Child=panel;
//Thetopchildcontainstextwithinstructions
TextFlowtextflow=newTextFlow();
textflow.TextAlignment=TextAlignment.Center;
textflow.Visibility=Visibility.Visible;
textflow.TextRuns.Add(
newTextRun(Resources.GetString(Resources.StringResources.SelectAnItemFromBelow),
app.NinaBFont,instructionTextColor));
panel.Children.Add(textflow);
//Addablanklinetothestack
panel.Children.Add(textflow=newTextFlow());
textflow.TextRuns.Add("",app.NinaBFont,instructionTextColor);
textflow.Visibility=Visibility.Visible;
//Thenextchildcontainsalistboxwithoptions
m_listbox=newListBox();
//Preparethelistbox
Buttons.Focus(m_listbox);
panel.Children.Add(m_listbox);
this.Background=m_listbox.Background=newSolidColorBrush(backgroundColor);
m_listbox.SelectionChanged+=delegate(Objectsender,SelectionChangedEventArgse)...{
Int32previousSelectedIndex=e.PreviousSelectedIndex;
if(previousSelectedIndex!=-1)...{//Iftherewasapreviousindex
//Changepreviously-selectedlistboxitemcolortounselectedcolor
((Text)m_listbox.Items[previousSelectedIndex].Child).ForeColor=unselectedItemColor;
}
//Changenewly-selectedlistboxitemcolortoselectedcolor
((Text)m_listbox.Items[e.SelectedIndex].Child).ForeColor=selectedItemColor;
};
//Addtheitemstothelistbox
foreach(StringsinnewString[]...{"VerticalStack","HorizontalStack","Canvas","Diagonal"})...{
Texttext=newText(m_app.NinaBFont,s+"PanelDemo");
text.ForeColor=unselectedItemColor;
text.TextAlignment=TextAlignment.Center;
text.Width=this.Width;
ListBoxItemlbi=newListBoxItem();
lbi.Background=m_listbox.Background;
lbi.Child=text;
m_listbox.Items.Add(lbi);
}
m_listbox.SelectedIndex=0;
//Addablanklineinthestack
panel.Children.Add(textflow=newTextFlow());
textflow.TextRuns.Add("",app.NinaBFont,instructionTextColor);
textflow.Visibility=Visibility.Visible;
//Thebottomchildcontainstextwithreturninstructions
textflow=newTextFlow();
textflow.TextAlignment=TextAlignment.Center;
textflow.Visibility=Visibility.Visible;
textflow.TextRuns.Add(
newTextRun("(AfterviewingaPanelDemo,hitEntertoreturntothisscreen)",
app.NinaBFont,instructionTextColor));
panel.Children.Add(textflow);
}
protectedoverridevoidOnButtonDown(ButtonEventArgse)...{
//If<enter>buttonispressed,gointotheselecteddemo</enter>
if(e.Button==Button.Select)...{
switch(MainListBox.SelectedIndex)...{
case0://VerticalStackPanelDemo
newStackPanelDemo(m_app,Orientation.Vertical);
break;
case1://HorizontalStackPanelDemo
newStackPanelDemo(m_app,Orientation.Horizontal);
break;
case2://CanvasPanelDemo
newCanvasPanelDemo(m_app);
break;
case3://DiagonalPanelDemo
newDiagonalPanelDemo(m_app);
break;
}
}
//Don'tcallbaseimplementation(base.OnButtonDown)orwe'llgobackHome
}
protectedoverridevoidOnGotFocus(FocusChangedEventArgse)...{
//Wheneverthiswindowgetsfocus,itgivesittoitslistbox
Buttons.Focus(m_listbox);
base.OnGotFocus(e);
}
}
/**///////////////////////////////////////////////////////////////////////////////
internalsealedclassStackPanelDemo:PresentationWindow...{
//ThisclassshowshowtobuildyourownshapedrawinginaDrawingContext
privatesealedclassCross:Shape...{
publicCross()...{}
publicoverridevoidOnRender(DrawingContextdc)...{
//Drawalinefromtop,lefttobottom,right
dc.DrawLine(base.Stroke,0,0,Width,Height);
//Drawalinefromtop,righttobottom,left
dc.DrawLine(base.Stroke,Width,0,0,Height);
}
}
publicStackPanelDemo(MyAppapp,Orientationorientation)
:base(app)...{
StackPanelpanel=newStackPanel(orientation);
this.Child=panel;
panel.Visibility=Visibility.Visible;
Shape[]shapes=newShape[]...{
newEllipse(),
newLine(),
newPolygon(newInt32[]...{0,0,50,0,50,50,0,50}),//ASquare
newRectangle(),
newCross()//Ourowncustomshape
};
for(Int32x=0;xshapes.Length;x++)...{
Shapes=shapes[x];
s.Fill=newSolidColorBrush(ColorUtility.ColorFromRGB(0,255,0));
s.Stroke=newPen(Color.Black,2);
s.Visibility=Visibility.Visible;
s.HorizontalAlignment=HorizontalAlignment.Center;
s.VerticalAlignment=VerticalAlignment.Center;
s.Height=Height-1;
s.Width=Width-1;
if(panel.Orientation==Orientation.Horizontal)
s.Width/=shapes.Length;
else
s.Height/=shapes.Length;
panel.Children.Add(s);
}
}
}
/**///////////////////////////////////////////////////////////////////////////////
internalsealedclassCanvasPanelDemo:PresentationWindow...{
publicCanvasPanelDemo(MyAppapp)
:base(app)...{
Canvascanvas=newCanvas();
this.Child=canvas;
this.Background=newSolidColorBrush(ColorUtility.ColorFromRGB(0,255,255));
for(Int32x=0;xWidth;x+=Width/4)...{
for(Int32y=0;yHeight;y+=Height/4)...{
Texttext=newText(m_app.SmallFont,"("+x+","+y+")");
Canvas.SetLeft(text,x);
Canvas.SetTop(text,y);
canvas.Children.Add(text);
}
}
}
}
/**///////////////////////////////////////////////////////////////////////////////
internalsealedclassDiagonalPanelDemo:PresentationWindow...{
publicDiagonalPanelDemo(MyAppapp)
:base(app)...{
DiagonalPanelpanel=newDiagonalPanel();
this.Child=panel;
this.Background=newLinearGradientBrush(
ColorUtility.ColorFromRGB(192,0,0),ColorUtility.ColorFromRGB(32,0,0),0,0,Width,Height);
for(Int32x=0;x4;x++)...{
Bitmapb=newBitmap(Width/4,Height/4);
b.StretchImage(0,0,app.Snowflake,b.Width,b.Height,(UInt16)((x+1)*50));
Imageimage=newImage(b);
panel.Children.Add(image);
}
}
//ThisclassshowshowtobuildyourownPanel
privatesealedclassDiagonalPanel:Panel...{
publicDiagonalPanel()...{
}
protectedoverridevoidMeasureOverride(intavailableWidth,intavailableHeight,outintdesiredWidth,outintdesiredHeight)...{
//Calledtocalculatethewidth/heightdesired
desiredWidth=0;
desiredHeight=0;
foreach(UIElementchildinChildren)...{
if(child.Visibility!=Visibility.Collapsed)...{
child.Measure(Int32.MaxValue,Int32.MaxValue);
Int32childWidth,childHeight;
child.GetDesiredSize(outchildWidth,outchildHeight);
desiredWidth+=childWidth;
desiredHeight+=childHeight;
}
}
}
protectedoverridevoidArrangeOverride(intarrangeWidth,intarrangeHeight)...{
Int32x=0,y=0;
foreach(UIElementchildinChildren)...{
if(child.Visibility!=Visibility.Collapsed)...{
Int32childWidth,childHeight;
child.GetDesiredSize(outchildWidth,outchildHeight);
child.Arrange(x,y,childWidth,childHeight);
x+=childWidth;
y+=childHeight;
}
}
}
}
}
/**///////////////////////////////////////////////////////////////////////////////
后记:此外在会上还遇到了我的偶像马宁、马琪、张欣(还是张欣强,通过回答问题获得一个MF开放套件),如果他们不介意附上照片作个留念:-)
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