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  • QGraphicsItem doesn't receive mouse hover events

    - by Jen
    I have a class derived from QGraphicsView, which contains QGraphicsItem-derived elements. I want these elements to change color whenever the mouse cursor hovers over them, so I implemented hoverEnterEvent (and hoverLeaveEvent): void MyGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent* event) { update (boundingRect()); } However, this event handler code is never executed. I've explicitly enabled mouse tracking: MyGraphicsView::MyGraphicsView(MainView *parent) : QGraphicsView(parent) { setMouseTracking(true); viewport()->setMouseTracking(true); ... } Still, no luck. What am I doing wrong?

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  • Alternative to middle click for Linux in Parallels on a MacBook?

    - by Roland Swingler
    I'm running Ubuntu on Parallels on a MacBook, and there is no middle-click on the MacBook trackpad - which is annoying because it means you can't do X's paste action. Is there an alternative? I'm hoping there is a keyboard binding to X's paste or better a way to bind a keyboard key/combination to the middle-click action. Edit: I know about the emulate three-button mouse option, but that won't work for me because the trackpad only allows you to click one button at a time

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  • Symbol LL500 Scanner Interface Not Detected

    - by agentfll
    I have an old Symbol LL500 scanner interface box and a scanner to go with it. The box's original cable used one of the old microsoft mouse connectors, but I got a converter to USB. The problem is that when I connect it to my MacBook, the interface powers up and works, but the computer dosen't recognize it or even say that a device is connected. Is there any way to make it see that the interface is there or am I just screwed?

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  • How to prevent button/movieclip from interfering with mouse events

    - by webfac
    I have a few swf's that are loaded into a base file using levels. These clips can be cycled through by means of a setInterval function or when the user clicks the next or previous button. However, when the user hovers over a defined 'hit' area which is ultimately a blank movie clip, the setTimeout call is then canceled. This works fine, except that now the 'hit' clip - being above everything - prevents the movies below accepting hit states, and if I move it to below everything else, when one mouses over any element in the loaded movie, it then acts as though the user has mouse out of the hit area. Is there any way to have this 'hit' clip do its job simply by determining if the mouse is over it, but without using an onRollOver function or equivalent? Much appreciated

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  • get all elements under a mouse drag selection

    - by Jayapal Chandran
    Hi, You guys would have seen the image cropping tool which has a selection option (marque tool) created in javascript. http://marqueetool.net/examples/ Like this i want to get all elements under a selection. For example in windows we have mouse group selection of files and folders by dragging the mouse to select multiple files. Like that i need to get all the elements under a selection in javascript. I can try other gimmicks but if there could be a simple tool then i can speed up my work.

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  • MFC/WIN32: mouse hover highlight in listctrl

    - by Mordachai
    The ListView control of Windows Explorer gives a highlight to whatever item is under the mouse, without affecting the current selection. This helps enormously with relating what item a given tooltip applies to within a listview - especially in report mode. However, I am currently unable to find any APIs that would give my MFC application's CListCtrl that same behavior. Extended styles only have LVS_EX_TRACKSELECT, which actually alters the current selection (yuck!). Does anyone know how to provide a standard CListCtrl (or whatever that actually sits on top of) the mouse-hot-tracking capability? I found some articles on how to provide per cell and per row tooltip text, but its hard to tell what the tooltips relate to without something highlighting...

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  • .NET Ascertaining mouse is on line drawn between two arbitrary points

    - by johnc
    I have an arrow drawn between two objects on a Winform. What would be the simplest way to determine that my mouse is currently hovering over, or near, this line. I have considered testing whether the mouse point intersects a square defined and extrapolated by the two points, however this would only be feasible if the two points had very similar x or y values. I am thinking, also, this problem is probably more in the realms of linear algebra rather than simple trigonometry, and whilst I do remember the simpler aspects of matrices, this problem is beyond my knowledge of linear algebra. On the other hand, if a .NET library can cope with the function, even better.

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  • IE 7 CSS problem with detecting mouse over on div

    - by BeaverProj
    I have a div inside an li as part of a top navigation for a website. I'm having trouble with IE 7 having "holes" in the box such that the drop down disappears when the user is still on the drop down. I started with a pure CSS solution (li:hover) and that works awesome in all browsers except IE 7. So I've now added a jQuery/javascript solution to detect when the mouse enters and exits the nav li and then add a class to show the drop down. It works better, but if the mouse is not over an image, p, h3, or a tag then it doesn't think I'm over the div that is the drop down. Very frustrating. I can post some test code, but the issue can be viewed here: http://davincidays.org/ Anyone have any ideas? I've been working on this for waaaay too long already and need some fresh things to try.

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  • how to show data on mouse over in datagrid

    - by prince23
    hi, i have an Datagrid lets say i have columns with name, age, mail ID. so all the details should be shown in a pop up or some thing like side also will do. is there any thing like an slide control so that once i make a mouse over the row i display that row values in silde? i need to show an pop up with details what i have displayed in that row. how can i achive this functionality here. right now binding values to datagrid is done this functioanlity is done. how can i go ahead to get an solution to show pop up on mouse over. any help on this issue would be really great and help fully. i am new to silver light concept plz provide an solution on this. thanks in advance prince

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  • Mouse Events lost on zoom in silverlight

    - by Ged
    Hi All, I'm running into an issue where I seem to be losing mouse events. Essentially I have a grid with a bunch of controls that get refreshed (removed/re-added via Grid.Children.Clear and Grid.Children.Add(control) ) via a WCF_Service. If I zoom in to a part of the grid where no control exists, I'm unable to zoom out. I have implemented zoom to mouse position but have logic to ensure the coordinates of the grid are never beyond the window of screen. (Eg: Grid.ActualWidth must be 0 and Translate.X must be < Grid.ActualWidth - 200) I have also experienced this where I can still see a section of one of the controls, but it still is not able to zoom out (unless I'm over the control). Appreciate any and all help.

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  • JButtons don't imediatly change on mouse event

    - by out_sider
    I'm using the java swing library to develop a board game called DAO. The problem is that after the human player makes its move, by clicking on the JButton with the piece image that he wants to play, I call the computer AI routine but inside the mouse event function. By doing this only when the function returns, the computer ends its turn, do the JButtons refresh their Images (setIcon comes in). I'd like to know how can I force the JButtons to change their image at the moment they are clicked and not only when the mouse event function ends (as I need to handle data inside it). I've tried all of this myButtons[i][j].setIcon(xIcon); myButtons[i][j].revalidate(); myButtons[i][j].repaint(); myButtons[i][j].validate(); None worked. Thx in advance

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  • Laptop + External Monitor: Possible to Scale Mouse-crossover Position?

    - by Brian Lacy
    I have a laptop with a 16" screen @ 1366x768 resolution, and a 24" external monitor at 1920x1200 resolution. I'm extending the Windows 7 desktop onto the other screen. The 24" is the secondary monitor, and is positioned so the bottom of that screen lines up with the bottom of the 16" screen. Currently, if I move the mouse to the top portion of the 24" screen, then move left, the mouse will stop at the edge of the 24" screen until I move it down far enough to get into the range of the 16" screen. So that's all pretty standard; but I'm wondering if there's any software out there that will allow me to "scale" the mouse-crossover position, such that if I'm at the TOP of the 24" screen and move left, the mouse will cross to the TOP of the 16" screen, whereas if I'm at the BOTTOM of the 24" screen, crossing over will position the mouse at the BOTTOM of the 16" screen. So then, if the mouse cursor is on the 24" screen at (x,y) position (10,600), and I move 20 pixels left, the mouse is now on the 16" screen at position (1356,384). Anyone know of such a solution?? Note: I also use Ubuntu, so if there's a solution to this for X, but not Windows, I'd be interested in that also.

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  • Graphics Question: How do I restrict the mouse cursor to within a circle?

    - by Dan
    I'm playing with XNA. When I click the left mouse button, I record the X,Y co-ordinates. Keeping the mouse button held down, moving the mouse draws a line from this origin to the current mouse position. I've offset this into the middle of the window. Now, what I'd like to do is restrict the mouse cursor to within a circle (with a radius of N, centred on the middle of the screen). Restricting the mouse to a rectangular region is easy enough (by adjusting the origin by the difference of the mouse position and the size of the region), but I haven't a clue on how to start doing it for a circular region. Can anyone explain how to do this? Any advice on where to start would be helpful.

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  • Java keyboard hook

    - by Jason S
    I would like to write a Java app that counts how long I have been using the keyboard or mouse w/o a break. Are there any built-in classes or 3rd party libraries that can detect global keyboard/mouse use?

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  • How to reboot/shutdown Windows 8 without the mouse?

    - by Diogo
    Nowadays on Windows 7, if I have no mouse on my computer I just press Win Buttom+-+Enter: This makes my computer to shutdown without using a mouse. However, on Windows 8, I need the mouse to open that hidden menu on the right side of the screen, open the "Settings" tab - "Power" - Then choose for "Shut down", "Sleep" or "Restart": There is some keyboard shortcut to open these shutdowns options on Windows 8 or another way that not just with the mouse pointer?

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  • Ubuntu: Copy terminal mouse selection automatically to clipboard for other apps?

    - by mfn
    I can use keyboard shortcuts and selecting text with the left mouse button allows me to insert the selection within gnome-terminal with the middle mouse button. However, mouse selection with left button does not copy it to the clipboard and thus is not available to other apps. I don't want to use the keyboard shortcuts when I select text with the left mouse button, I want to automatically have it in the clipboard (much like putty works on Windows).

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