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• Ubuntu 11.10 boot: xhost: unable to open display

  - by paulus_almighty

  I've had this papercut for a while now, it's time it was fixed. When I boot up Ubuntu, choosing "Ubuntu...generic" from the grub screen, Ubuntu fails to load. It just sits at the driver/module loading screen. What seems to be the most significant line in this output is "xhost: unable to open display" If I choose "Ubuntu...(recovery mode)" from grub then it loads OK. I don't get why this is. Out of interest I tried enabling boot error logging with #/etc/default/bootlogd BOOTLOGD_ENABLE=Yes but I'm not seeing anything in that file. ETA: I've had this problem since fresh install of 11.10. Here's lshw: $ sudo lshw -C display *-display description: VGA compatible controller product: GF104 [GeForce GTX 460] vendor: nVidia Corporation physical id: 0 bus info: pci@0000:03:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:16 memory:f6000000-f7ffffff memory:e0000000-e7ffffff memory:ec000000-efffffff ioport:bf00(size=128) memory:e8000000-e807ffff

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• Web RDP not working in Ubuntu 11.10

  - by user77321

  I am not able to connect to the remote machine from Ubuntu 11.10 machine using Web RDP. The following are the details. Java Vendor: Oracle Corporation Java Version: 1.7.0_07 IVE Host: xxx.xxx.com Run Level:0, read timeout:90000 Applet is signed and trusted webRDP version: 1.0.8.16, 2011-04-14 10:34 Attempting to obtain the license from the application jar. Obtained the license from the application jar. Keyboard: IBM101 I have removed the actual host name from the above details The error message on a pop up window is Application Error UnsatisfiedLinkError Unable to load library 'libX11':liblibX11.so: cannot open shared object file: No such file or directory. This error happens soon after Applet loads. I am supposed to get a WebRDP Screen with logo then a Windows Login screen for the remote machine. ( This is working fine in Linux Mint) Anyone has experienced this problem? Any solutions?

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• Ubuntu can't shut down correctly [closed]

  - by Luc1Hz

  Possible Duplicate: Problem with ubuntu 12.04 I am new to Ubuntu. I've installed 12.04 version of Ubuntu. It works fine but sometimes when i shutdown my PC from Ubuntu and when I try to start it again,nothing shows on the screen. It's always black screen instead of Acer logo (I have Acer aspire 5573) and the system restart again and again but and doesn't allow me to choose a OS (Ubuntu/windows,i use dualboot) To fix this I have to remove the battery and put it again.Then everything works fine. How do i fix this issue? I think that could be a incompatibility with the PC because everything works fine with windows. Thanks!

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• Problems with input and suspend(separately)

  - by VaultPrisoner

  I'm still very new at Ubuntu/any other linux OS, so this might be an easy fix for most. I installed Ubuntu 14.04 a few days ago, it's dual-booted with Windows 8.1 and I'm using a Toshiba laptop. Whenever I suspend/close my computer, and then open it again, the front LEDs will light up telling me that it's running, but the screen will not do anything. I can hear the fan spinning, but it's almost like the screen doesn't power on like it should. Also, another problem I'm having, is that ~60% of the time, my trackpad and keyboard do not work at all, this starts as soon as Ubuntu boots up. To fix it, I just turn it off and back on until it works. My USB mouse does work no matter what though. Both problems are only present in Ubuntu and not windows 8.1.

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• Ubuntu 13.10 is terrible

  - by user137017

  I was satisfied with 13.04. But when I upgraded to 13.10, I've had a lot of issues and some things just no longer work. To name a few problems: Can't change the brightness My laptop makes more noise than before It freezes more frequently (the kind that doesn't respond to ctr + alt + f2) Sometimes it boots up and and can't play any media files When running a full screened virtual machine in Workstation, ubuntu catches mouse at the edges When I have a VM opened in Workstation and I try to open up another, the first one gets powered off Most irritatingly, when I have a virtual machine running in full screen, every now and then the vm screen goes black and I have to switch to the host and come back 13.10 has offered nothing to compensate for these problems. I would like to get some advice about what I can do. Should I stick with 13.10 and hope the bugs will be fixed? Would a clean reinstall of 13.10 help? Btw, I'm giving some thought to trying other distros.

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• Ubuntu will not install on my Dell Inspiron 580

  - by AndrewC

  I'm trying to install ubuntu on my Inspiron 580 (Intel Core i3 4Gb Ram Intel HD Graphics) but am having no success installing from CD or Windows installer all result in a purple rapidly flashing screen with the Ubuntu with 5 dots below it splash which doesn't change. I have tried releases 12.04.1 LTS (CD and windows installer), 11.10 (CD after reading it was certified for the 580) and today 12.10 (CD) all produce the same install failure. My Dell 1704PT monitor is connected to the intel HD board using an HDMI to DVI adaptor though I have tried a VGA cable and still got the same flashing screen. Any help gratefully received as i want to get away from Windows 7 Home Premium.

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• Ubuntu 12.10 - launcher stays hidden

  - by Mieszko

  Just upgraded to 12.10 today. Everything seems fine for now, aprat from one thing: The launcher on the left side of the screen doesn't come up after moving the cursor to the left side of the screen. It IS there since it show the app start animation and I can have it on top all the time, but I'm really fond of it being hidden most of the time. I did check the sensitivity settings and even set it up to MAX (thus high) and it changes nothing. Please help ;) Cheers

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• Ctrl F5 exception and ignored on F5

  - by user575219

  I am getting this unhandled exception error shown: See screen shot. I am getting this error only when I run with Ctrl+ F5 and not in F5(debug mode).Not sure if this is helpful,my computer is a windows 7- 64bit and running a 32 bit build According to this discussion: How can I get WinForms to stop silently ignoring unhandled exceptions?, Adding Application.SetUnhandledExceptionMode(UnhandledExceptionMode.ThrowException) iwll cause Windows to ignore the error. EDIT: frmPlant_Load Event public partial class frmPlant : Form { DatabaseConnection _DbConnection = new DatabaseConnection(); string conString = ConfigurationManager.ConnectionStrings["RVESTConnString"].ConnectionString; SQLQueries _SQlQueries = new SQLQueries(); DataSet ds; SQLiteDataAdapter da; static DataTable gdt; int gSelectedPlant; string gSelectedPlantName = ""; bool ignoreSelChg = false; bool DataDirty = false; public frmPlant() { InitializeComponent(); } public frmPlant(int sSelectedPlant) { InitializeComponent(); } private void frmPlant_Load(object sender, EventArgs e) { ds = FillData(); gdt = ds.Tables[0]; bindingSource1.DataSource = gdt; dataGridView1.DataSource = bindingSource1; gSelectedPlant = StaticClass.GlobalValue; dataGridView1.AutoGenerateColumns = true; dataGridView1.Columns["PlantId"].Visible = false; dataGridView1.Columns["NSSS_Design"].Width = 70; } private DataSet FillData() { ignoreSelChg = true; SQLiteConnection con = new SQLiteConnection(conString); DataSet dPlant; try { con.Open(); SQLiteCommand cmd = new SQLiteCommand("select * from Plant", con); da = new SQLiteDataAdapter("select * from Plant", con); dPlant = new DataSet(); da.Fill(dPlant, "plant"); } catch (Exception ex) { throw ex; } finally { con.Close(); } return dPlant; } I should also add another concern: When I say continue here in the dialog, it works fine but leaves a background process running. I have to manually go and kill it in the task manager Question: Suppose I add this line in the Program.cs, will it ignore ANY- even genuine errors which need to be fixed? More Code: This dialog pops up on button click on the second screen- Initial Setup screen . The first being a splash screen. Initial setup takes me to the Plant form Here's the code for the initial setup screen public partial class frmInitialSetUp : Form { public frmInitialSetUp() { InitializeComponent(); } private void btnOK_Click(object sender, EventArgs e) { Program.fPlant = new frmPlant(); Program.fPlant.Show(); this.Hide(); } private void frmInitialSetUp_Load(object sender, EventArgs e) { Program.LoadAllForms(); } } } Program.cs static public void LoadAllForms() { try { Program.fInitialSetUp = new frmInitialSetUp(); Program.fPlant = new frmPlant(); Program.frm*** = new frm***(); Program.frm*** = new frm***(); Program.frm*** = new frm***(); } catch (Exception ex) { throw ex; } } On button click on the

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• Landscape-only orientation + view controllers: What am I still missing?

  - by mahboudz

  Hi. I can't believe I am still having problems with screen orientation, now on the iPad. This is an app that only supports one of the two landscape orientation. In my info.plist, I include: <string>UIInterfaceOrientationLandscapeRight</string> <string>UIInterfaceOrientationLandscapeLeft</string> In Interface Builder, all my views are created in landscape orientation. Only the main Window is not, but I don't see a way to change that. When launched, I get the following coordinates for my main window and the main viewcontroller view: Window frame {{0, 0}, {768, 1024}} mainView frame {{0, 0}, {748, 1024}} (Changing the frame at runtime to be what I expect, does not change the odd behavior.) All other views after that show these coordinates when summoned (when loaded but before being presented): frame of keysig {{0, 0}, {1024, 768}} frame of instrumentSelect {{20, 0}, {1024, 768}} frame of settings {{0, 0}, {467, 300}} In all my viewControllers, i respond to shouldAutorotateToInterfaceOrientation with: return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) || (interfaceOrientation == UIInterfaceOrientationLandscapeRight)); In my app, everything (almost) functions as expected. The app launches into one of the two landscape modes. The views (and viewcontrollers) display everything where it belongs, taps work all across the screen, as expected. However, there are two clues that something is still wrong. Clue #1: I have two viewcontrollers that are UITabeViewControllers. When summoned, they are supposed to open up their views and scroll to the selected row of the table. However it is evident that they scroll, but they don't scroll down far enough. It seems that they think that the screen extends further down and they scroll just enough to move the row to a place near the bottom of the screen, but that location is not visible. When the views are loaded, the coordinates are: frame of keysig {{0, 0}, {1024, 768}} frame of instrumentSelect {{20, 0}, {1024, 768}} When I present them using a popover, the frames get resized to: frame of keysig {{0, 0}, {320, 655}} frame of instrumentSelect {{0, 0}, {320, 655}} The frame of the viewController that does the presentation, same mainView frame mentioned above is: frame of self {{20, 0}, {748, 1024}} I have also tried to accomplish the same thing with presentModalViewController instead of presentPopover, and have the same results. This is what the popovers look like: In both cases, the selected row is below the horizon, even though the tableView did visibly scroll in order to make the row visible. I am not sure what to try next. I checked each UITable's scrollView content coordinates and they seemed reasonable. It almost seems like a UITable internal rect gets created with the wrong number and stays that way. Clue #2: All my actionsheets come up with a width of 320. I can only assume that the iPad allows actionSheets in only 320 or 480 widths and since it somehow thinks that the screen is oriented in portrait mode, and then uses the narrower width. There you have it. I can't believe I am still getting hung up on orientation issues. I swear Apple doesn't make it easy to have a landscape app. Any ideas?

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• How can I assert from Python C code?

  - by Joe

  I'm writing a Python class in C and I want to put assertions in my debug code. assert.h suits me fine. This only gets put in debug compiles so there's no chance of an assert failure impacting a user of the Python code*. I'm trying to divide my 'library' code (which should be separate to the code linked against Python) so I can use it from other C code. My Python methods are therefore thinnish wrappers around my pure-C code. So I can't do this in my 'library' code: if (black == white) { PyErr_SetString(PyExc_RuntimeError, "Remap failed"); } because this pollutes my pure-C code with Python. It's also far uglier than a simple assert(black != white); I believe that the Distutils compiler always sets NDEBUG, which means I can't use assert.h even in debug builds. Mac OS and Linux. Help! *one argument I've heard against asserting in C code called from Python.

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• css nth-child(2n+1) repaint css after filtering out list items

  - by Michael

  I have a list of 20+ items. The background-color changes using the :nth-child(2n+1) selector. (ie. even item black, odd item white). When I click a button to filter out specific items using the jQuery Isotope plugin it adds a .isotope-hidden class to the items I want to filter out, which changes the position of the list item to 0,0 and opacity to 0. When this happens the remaining items are left with the original black/white background-colors, which are now no longer in order. Does anyone know a way to "repaint' the css using the :nth-child(2n+1) selector on the items that do not contain the .isotope-hidden class. I tried #element tr:not(.isotope-hidden):nth-child(2n+1) with no avail. Any help would be appreciated. Thank you.

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• UITableView backgroundColor always gray on iPad

  - by rjobidon

  Hi, When I set the backgroundColor for my UITableView it works fine on iPhone (device and simulator) but NOT on the iPad simulator. Instead I get a light gray background for any color I set including groupTableViewBackgroundColor. Steps to reproduce: Create a new navigation-based project. Open RootViewController.xib and set the table view style to "Grouped". Add this responder to the RootViewController:- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor blackColor]; } Select Simulator SDK 3.2, build and run. You will get a black background (device and simulator). Select your target in the project tree. Click on Project : Upgrade Current Target for iPad. Build and run. You will get a light gray background. Revert the table view style to Plain and you will get a black background. Thanks for your help!

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• Overlay WriteableBitmap with color

  - by rajenk

  I'm trying to overlay a WriteableBitmap with a certain color in Silverlight. I have a black and white base image, which I'm using to create smaller WriteableBitmap images for a new composite image and I want to overlay either the black or white part of the source image cut-out with a certain color before adding it to the composite image. What I'm doing now is: var cutOut = new WriteableBitmap(8, 14); /* cut out the image here */ cutOut.Render(sourceImage, transform); // sourceImage is the base image cutOutImage.Source = cutOut; // cutOutImage is an Image element in XAML compositeImage.Render(cutOutImage, transform2); // compositeImage is the final WriteableBitmap that is shown on screen I tried the methods on http://blogs.silverarcade.com/silverlight-games-101/15/silverlight-blitting-and-blending-with-silverlights-writeablebitmap/ and using the extension methods from hxxp://writeablebitmapex.codeplex.com/, but I cannot seem to get a color overlay on the cutOut image before rendering it to the compositeImage. Does anyone know of a good method to do this? Thanks in advance.

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• MS Chart Control Scale - Line graph show 12 months

  - by Mike

  Hi, On my X Axis, I have months. The chart shows up to 11 points, i.e. Jan - Nov of the same year, but when I add 12 points (Jan - Dec), it will do an auto label thing and change the interval for every 4 months. How can I change the graph so that it shows 12 months before it does the auto labels? Here is the server control code I am currently using. <asp:CHART ID="Chart1" runat="server" BorderColor="181, 64, 1" BorderDashStyle="Solid" BorderWidth="2" Height="296px" ImageLocation="~/TempImages/ChartPic_#SEQ(300,3)" ImageType="Png" Palette="None" Width="700px" BorderlineColor=""> <legends> <asp:Legend BackColor="Transparent" Font="Trebuchet MS, 8pt, style=Bold" IsTextAutoFit="False" Name="Default" Alignment="Center" DockedToChartArea="ChartArea1" Docking="Top" IsDockedInsideChartArea="False" Title="Legend"> </asp:Legend> </legends> <series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartType="Line" Color="220, 65, 140, 240" MarkerSize="6" Name="Series1" ShadowColor="Black" ShadowOffset="2" XValueType="DateTime" YValueType="Double" LabelFormat="c0" LegendText="Actual" MarkerStyle="Circle"> </asp:Series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartType="Line" Color="220, 224, 64, 10" MarkerSize="6" Name="Series2" ShadowColor="Black" ShadowOffset="2" XValueType="DateTime" YValueType="Double" LabelFormat="c0" LegendText="Projected" MarkerStyle="Circle"> </asp:Series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartArea="ChartArea1" ChartType="Line" Legend="Default" Name="Series3" LabelFormat="c0" XValueType="DateTime" YValueType="Double" Color="0, 192, 192" MarkerSize="6" ShadowColor="Black" ShadowOffset="2" LegendText="Actual Credit Limit" MarkerStyle="Circle"> </asp:Series> </series> <chartareas> <asp:ChartArea BackColor="#DEEDF7" BackGradientStyle="TopBottom" BackSecondaryColor="White" BorderColor="64, 64, 64, 64" BorderDashStyle="Solid" Name="ChartArea1" ShadowColor="Transparent"> <area3dstyle inclination="40" isclustered="False" isrightangleaxes="False" lightstyle="Realistic" perspective="9" rotation="25" wallwidth="3" /> <axisy linecolor="64, 64, 64, 64" islabelautofit="False" isstartedfromzero="False"> <LabelStyle Font="Trebuchet MS, 8.25pt, style=Bold" Format="c0" /> <majorgrid linecolor="64, 64, 64, 64" /> </axisy> <axisx linecolor="64, 64, 64, 64" intervaloffsettype="Months" intervaltype="Months" islabelautofit="False" isstartedfromzero="False"> <LabelStyle Font="Trebuchet MS, 8.25pt, style=Bold" Angle="-60" Format="MMM yy" /> <majorgrid linecolor="64, 64, 64, 64" /> </axisx> </asp:ChartArea> </chartareas> </asp:CHART> Thanks.

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• WPF drop shadow

  - by Petezah

  Currently I'm making something in WPF that has a border that contains a grid and other controls. The problem I'm facing is that whenever I set the Border.Effect property to a drop shadow effect every control contained in the border now has a drop shadow. Is there a way to set the shadow just to the border and not every control contained in the border? Here is a short example of my code: <Grid> <Border Margin="68,67,60,67" BorderBrush="Black" BorderThickness="1" CornerRadius="10"> <Border.Effect> <DropShadowEffect/> </Border.Effect> <Rectangle Fill="White" Stroke="Black" Margin="37,89,118,98" /> </Border> </Grid>

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• PropertyGrid PaintValue problem: How to remove (and paint outside) the standard rectangle?

  - by Pedery

  This might be a straightforward question, even though I haven't found an easy solution to it: I've implemented my custom UITypeEditor with the sole purpose of adding a PaintValue to bools. For the sake of the discussion, let's assume that PaintValue will either paint a checked or unchecked radiobutton. Question 1: Now, here's the problem: It seems like PaintValue automatically inserts a 20x13px rectangle after all paint code has completed. Naturally, a radiobutton inside a black rectangle is ugly. Can I easily instruct or override this rectagle not to be painted? Question 2: In this respect, is it possible to paint on top of the propertygrid's native look - meaning could I paint something in order to obscure (part of) the black line separating two grid cells vertically? The purpose of doing this would be to indicate that two values were linked, like constrained width/height to an aspect ratio.

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• SSRS 2005 Matrix and border styles when exporting to XLS

  - by Mufasa

  The Matrix in SSRS (SQL Server Reporting Services 2005) seems to have issues with certain the border styles when exporting to XLS (but not PDF or web view; maybe other formats, not sure?). For example: Create a matrix and set the Matrix border style to Black Solid 1px, but all 4 of the cells to have a border style of Black None 1px. When viewed via the ASP.NET control, it looks correct. But after export to XLS, it creates borders around all of the header cells (column and row headers, and the top left cell), and even the right most data column. But all the cells in the middle of the report correctly have no border set. Update: If the Matrix borders are set to None, then the borders on the cells don't show up in XLS. So, how do you set an outer border around the Matrix, but not have it apply the 'all sides' border to every cell that touches the edge of the Matrix when exported to Excel?

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• JQuery - drop shadow plugin. Custom color

  - by Ockonal

  Hello, I'm using Jquery plugin DropShadow: web site And I want to set drop shadow color manually. Color is specified in the usual manner, with a color name or hex value. The color parameter does not apply with transparent images. From documentation, so, here is my code: { ... color: "black", swap: false } It works perfect, with '#000' against 'black' it works too... But if I need shadow color, for example, red '#fff000' plugin doesn't work. I don't see any shadow. Why?

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• One to many too much data returned - MySQL

  - by Evan McPeters

  I have 2 related MySQL tables in a one to many relationship. Customers: cust_id, cust_name, cust_notes Orders: order_id, cust_id, order_comments So, if I do a standard join to get all customers and their orders via PHP, I return something like: Jack Black, jack's notes, comments about jack's 1st order Jack Black, jack's notes, comments about jack's 2nd order Simon Smith, simon's notes, comments about simon's 1st order Simon Smith, simon's notes, comments about simon's 2nd order The problem is that *cust_notes* is a text field and can be quite large (a couple of thousand words). So, it seems like returning that field for every order is inneficient. I could use *GROUP_CONCAT* and JOINS to return all *order_comments* on a single row BUT order_comments is a large text field too, so it seems like that could create a problem. Should I just use two separate queries, one for the customers table and one for the orders table? Is there a better way?

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• Code editor skins?

  - by Khalspi

  This is a kind of unorthodox question. Frankly, I won't lie to you. I am new to programming and am planning to improve myself. I enjoy coding but I need something to keep me going during the down times, so my question is: Is there such a thing as a code editor skin? A compiler skin? For example, you have the Command Prompt, it has a black background with white writing, it seems geeky, exactly what I want. I want a compiler that looks like command prompt...black with white writing (or green) or still has color coding (some compilers change color of text based on command). Yes, this is mainly for boasting, but I don't want to show someone something that basically looks like a text editor, I just want something that looks a little cooler. P.S (This question may seem a little unnecessary, it is because it is my first question, I'd like to warm up to this community before I start asking some real questions about code.)

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• How to draw semi-transparent text on a graphics object?

  - by awe

  I want to draw a text with 32 bit transparency on a graphics object. When I try, I only get black color in the result. If I try to draw a line with the same semitransparent color, it works perfectly. I have this code: lBitmap As New Bitmap(32, 32, PixelFormat.Format32bppArgb) lGraphic As Graphics = Graphics.FromImage(lBitmap) lGraphic.SmoothingMode = SmoothingMode.HighQuality lGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic lGraphic.Clear(Color.Transparent) Dim lTestTransparencyColor As Color = Color.FromArgb(100, 140, 0, 230) lGraphic.DrawLine(New Pen(lTestTransparencyColor), 0, 0, 32, 32) lBrush As New SolidBrush(lTestTransparencyColor) lGraphic.DrawString("A", New Font("Arial", 12), lBrush, 0, 0) Dim lImage As Image = lBitmap lImage.Save("D:\Test.png", Imaging.ImageFormat.Png) The line is drawn with the transparency applied correctly, but the text is black with no transparency. I was thinking it may be that SolidBrush does not support transparency, but I found a predefined brush named Transparent (Brushes.Transparent) that was a SolidBrush when I looked at it in debug. I tried to use Brushes.Transparent as the brush when drawing the text, and it was successfully not showing at all. That means I get full transparency to work, but not partial transparency.

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• OpenCL or OpenGL – which one to use?

  - by Malte Schledjewski

  My Problem involves a black and white image with a black area in the middle. I never worked with OpenGL or OpenCL before so I do not know which one to chose. I want to put some white circles over the area and check at the end whether the whole image is white. I will try many combinations so I want to use the GPU because of its parallelism. Should I use OpenGL and create the circle as a texture and put it on top of the image or should I write some OpenCL kernels which work on the pixel/entries in the matrix?

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• Masking a Drawable/Bitmap on Android

  - by Joshua Rodgers

  I'm currently looking for a way to use a black and white bitmap to mask the alpha channel of another bitmap or Drawable on Android. I'm curious as to what the best way to do this is. I certainly have a couple of ideas for how to do this, but they are not optimal. I need to be able to apply a new mask to the image every so often (the black and white bitmap will change every few seconds). Any feedback on how to achieve this would be greatly appreciated.

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• input onfocus problem

  - by Syom

  it is the problem, i can't undertand anyway. i have the following simple script <input class="input" type="text" name="l_username" style="color: #ccc;" value= " <?if ($_POST[l_username] != '') echo $_POST[l_username]; else echo 'something';?>" onfocus="if (this.value == 'something') { this.value='';this.style.color='black';}" /> onfocus doesn't work here, but when i delete php script from value, it works <input class="input" type="text" name="l_username" style="color: #ccc;" value= " something" onfocus="if (this.value == 'something') { this.value='';this.style.color='black';}" /> it works fine. could you tell me why? thanks

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• place and show pixel in the Cartesian plane graph in JavaFX

  - by user3671803

  I have this method to draw the Cartesian plane in JavaFX, using canvas and would like to know if it is possible to place or show the pixel: public class Grafics extends StackPane { private Canvas canvas; public void Grafics(){ GridPane grid = new GridPane(); grid.setPadding(new Insets(5)); grid.setHgap(10); grid.setVgap(10); canvas = new Canvas(); canvas.setHeight(500); canvas.setWidth(700); GridPane.setHalignment(canvas, HPos.CENTER); grid.add(canvas, 0, 2); GraphicsContext gc = canvas.getGraphicsContext2D(); gc.setFill(Color.BLACK); gc.fillRect(0, 0, canvas.getWidth(), canvas.getHeight()); gc.setFill(Color.WHITE); gc.fillRect(1, 1, canvas.getWidth() - 2, canvas.getHeight() - 2); drawAxesXY(gc); //call the method drawAxes getChildren().addAll(grid);// add an gridpane in stackpane } private void drawAxesXY(GraphicsContext gc1) { PixelWriter pixelWriter = canvas.getGraphicsContext2D().getPixelWriter(); gc1.setFill(Color.WHITE); gc1.setStroke(Color.BLACK); gc1.setLineWidth(1.5); gc1.strokeText("Y", 350, 30); gc1.scale(1, 1); gc1.translate((canvas.getHeight() / 50) - (canvas.getWidth() / 10), canvas.getHeight() / 50); gc1.strokeLine(canvas.getWidth() - 300, canvas.getWidth() - 300, canvas.getHeight() - 100, canvas.getHeight() / 30); pixelWriter.setColor(300, 300, Color.RED); gc1.strokeText("X", 620, 220); gc1.translate(canvas.getWidth() - (canvas.getHeight() / 10), -220); gc1.rotate(90.0); gc1.setFill(Color.WHITE); gc1.setStroke(Color.RED); gc1.setLineWidth(1.5); gc1.strokeLine(canvas.getWidth() - 250, canvas.getWidth() - 250, canvas.getHeight() - 50, canvas.getHeight() / 30); pixelWriter.setColor(620, 220, Color.RED); } } I put a line black and the other red http://postimg.org/image/tewjhco4z/ and I wanna know if is possible to place or show the pixel in Figure like this http://postimg.org/image/98k9mvnb3/

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