我想在IsMouseOver == True时更改按钮的背景颜色
<Button Command="{Binding ClickRectangleColorCommand}" Background="{Binding Color, Converter={StaticResource RGBCtoBrushColorsConverter},Mode=TwoWay}" Width="auto" Height="40">
<TextBlock Foreground="Black" Text="{Binding Color, Converter={StaticResource RGBCColorToTextConveter},Mode=TwoWay}"/>
<Button.Style>
<Style TargetType="Button" BasedOn="{StaticResource {x:Type Button}}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="DarkGoldenrod"/>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
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我似乎无法理解为什么这个触发器不起作用.
考虑:
for (auto i = 0; i < g.size(); ++i)
for (auto j = 0; j < g.size(); ++j) if (g[i][j] == 0) dfs(g, i, j), ++regions;
return regions;
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我不喜欢一个行代码。代码在中执行if()什么?
我对“,”符号感到困惑。
通常我会这样写:
for (auto i = 0; i < g.size(); ++i)
{
for (auto j = 0; j < g.size(); ++j)
{
if (g[i][j] == 0)
{
dfs(g, i, j)
}
,++regions; // I am not sure what to do here. Inside the "if" scope??
}
}
return …Run Code Online (Sandbox Code Playgroud) 我试图了解不同的用例.和2线程使用之间的区别.
这是我读过的一个很棒的教程boost::thread_group.
这是我正在使用的代码:
boost::threadpool::pool s_ThreadPool(GetCoreCount());
CFilterTask task(pFilter, // filter to run
boost::bind(&CFilterManagerThread::OnCompleteTask, this, _1, _2) // OnComplete sync callback // _1 will be filter name // _2 will be error code
);
// schedule the new task - runs on the threadpool
s_ThreadPool.schedule(task);
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这是析构函数:
s_ThreadPool.wait(0);
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你能解释一下吗?
根据这个
http://wix.tramontana.co.hu/tutorial/user-interface/ui-wizardry
我创建了以下代码
<?xml version="1.0" encoding="utf-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Product Id="*" Name="Installer" Language="1033" Version="0.0.1.4" Manufacturer="my" UpgradeCode="*">
<Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />
<MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
<MediaTemplate EmbedCab="yes" />
<!--icon for Add/Remove Programs-->
<Icon Id="WINDOWS.ico" SourceFile="..\WINDOWS.ico" />
<Property Id="ARPPRODUCTICON" Value="WINDOWS.ico" />
<Feature Id="ProductFeature" Title="Installer" Level="1" Description="The complete installation" Display="expand" ConfigurableDirectory="INSTALLFOLDER">
<ComponentRef Id="ProgramMenuDir" />
<ComponentGroupRef Id="ExportReleaseComponentGroup" />
</Feature>
<!--Internal tools-->
<Feature Id="Internal_Calibration_tools" Title="Internal Calibration tools" Level="1000" Description="Internal tools">
<ComponentGroupRef Id="group_Internal_Calibration_tools" />
</Feature>
<UIRef Id="WixUI_Mondo"></UIRef>
<UIRef Id="WixUI_ErrorProgressText" /> …Run Code Online (Sandbox Code Playgroud) 我有一个MxNx3矩阵,我想把它转移到matlab使用MWArray.
这是我的代码,但是没有CTOR.
有什么办法吗?
RGBImage image = _currentImage as RGBImage;
int height = image.Height;
int width = image.Width;
//transform the 1D array of byte into MxNx3 matrix
byte[, ,] rgbByteImage = new byte[3, height, width];
if (image[0].Bpp > 16)
{
for (int i = 0; i < height; i++)
{
for (int j = 0, k = 0; k < width; j = j + 3, k++)
{
rgbByteImage[0, i, k] = image[0].Data[i * width + j];
rgbByteImage[1, i, …Run Code Online (Sandbox Code Playgroud) 在我的系统中,我需要捕获并发送单元格编辑的旧值和新值.我已经读过你可以通过检查事件DataGridCellEditEndingEventArgs的EditingElement来做到这一点:
_dataGrid.CellEditEnding += (sender, e) => {
var editedTextbox = e.EditingElement as TextBox;
if (editedTextbox != null)
MessageBox.Show("Value after edit: " + editedTextbox.Text);
}
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在我的例子中,数据是字典,因此EditingElement是ContentPresenter
var editedTextbox = e.EditingElement as ContentPresenter;
if (editedTextbox != null)
MessageBox.Show("Value after edit: " + editedTextbox.Content);
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内容是原始内容,而不是新编辑的值.
我怎样才能让它工作:
_dataGrid.SomeEvent(sender, e)->{
SendValues(e.oldCellValue, e.newCellValue);
}
Run Code Online (Sandbox Code Playgroud) <?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
xmlns:util="http://schemas.microsoft.com/wix/UtilExtension"
xmlns:bal="http://schemas.microsoft.com/wix/BalExtension"
xmlns:netfx='http://schemas.microsoft.com/wix/NetFxExtension'>
<Bundle Name="IPDev" Version="0.6" Manufacturer="MYAPP Corporation" UpgradeCode="f380ae43-5df1-4cfe-9297-526e3e638e57">
<BootstrapperApplicationRef Id="WixStandardBootstrapperApplication.RtfLicense" />
<Chain>
<!-- TODO: Define the list of chained packages. -->
<PackageGroupRef Id="Netfx45FullPackage"/>
</Chain>
</Bundle>
<Fragment>
<!--checking for matlab 2012a installation-->
<util:RegistrySearch Id="MatlabPath"
Variable="UniqueId"
Root="HKLM"
Key="SOFTWARE\MathWorks\MATLAB\4.17\"
Result="exists"
Win64="yes"
/>
<!--checking for matlab MCR 2012a 64 bit installation-->
<util:RegistrySearch Id="MatlabMCRPath"
Variable="UniqueId"
Root="HKLM"
Key="SOFTWARE\MathWorks\MATLAB Compiler Runtime\7.17\"
Result="exists"
Win64="yes"
/>
<PackageGroup Id="Netfx45FullPackage">
<ExePackage Id="Netfx45Xxx" Cache="no" Compressed="no" PerMachine="yes" Permanent="yes" Vital="no" InstallCommand="/q"
SourceFile="..\SetupProject\dotnetfx45_full_x86_x64.exe"
DetectCondition="(Netfx4FullVersion="4.5.50709") AND (NOT VersionNT64 OR (Netfx4x64FullVersion="4.5.50709"))" …Run Code Online (Sandbox Code Playgroud) 我已经使用Matlab R2012a将一些matlab函数编译成.net DLL文件.一切都在按预期工作.我在Windows 7 64bit上使用WPF/C#.net 4.5,我的程序运行正常.
但是我们现在正在Windows 8专业版上转移和测试我们的程序.我们在运行时遇到问题 - 我们当然使用MCR R2012a来运行.dll文件.我们无法在win8中加载类或函数,程序崩溃.
谁有人遇到过这个问题?如果我们使用Matlab R2013a编译函数会有帮助吗?
我在Jon的Skeet在线页面上读到了如何在C#中创建一个线程安全的Singleton
http://csharpindepth.com/Articles/General/Singleton.aspx
// Bad code! Do not use!
public sealed class Singleton
{
private static Singleton instance=null;
private Singleton()
{
}
public static Singleton Instance
{
get
{
if (instance==null)
{
instance = new Singleton();
}
return instance;
}
}
}
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在此代码下面的段落中,它说:
如前所述,上述内容不是线程安全的.两个不同的线程都可以评估测试if(instance == null)并发现它是真的,然后两个创建实例,这违反了单例模式.请注意,实际上可能已经在计算表达式之前创建了实例,但是内存模型不保证其他线程可以看到实例的新值,除非已经传递了合适的内存屏障.
你能否解释为什么内存模型不能保证其他线程看不到实例的新值?
静态变量位于堆上,但为什么不立即与其他线程共享?我们是否需要等待上下文切换,以便其他线程知道实例不再为空?
这是我们在图像处理功课中的练习.我的代码工作正常.我想得到一些代码优化方面的帮助.
function C = convolve_slow(A,B)
(file name is accordingly convolve_slow.m )
This routine performs convolution between an image A and a mask B.
Input: A - a grayscale image (values in [0,255])
B - a grayscale image (values in [0,255]) serves as a mask in the convolution.
Output: C - a grayscale image (values in [0,255]) - the output of the convolution.
C is the same size as A.
Method: Convolve A with mask B using zero padding. Assume the …Run Code Online (Sandbox Code Playgroud) c# ×4
.net ×3
matlab ×3
wpf ×3
c++ ×2
wix ×2
wix3.5 ×2
wix3.6 ×2
boost-asio ×1
boost-thread ×1
bootstrapper ×1
button ×1
convolution ×1
datagrid ×1
mouseover ×1
optimization ×1
wix3.7 ×1
xaml ×1