Morning,
I'm currently building a R/Gtk2 application (mostly through gWidgets actually) and I would like to change the cursor shape to something sensible in different contexts. Specifically, I require a "zoom in" and "zoom out" shape when the appropriate tool is activated.
This post (how can i change the shape mouse cursor in gWidgets RGtk2?) gives good information on the syntax to use.
My problem is that in the list of available cursors (e.g. help("gdk-Cursors") ) includes all sort of weird and wonderful things (boat, clock and coffee mug....) but none of the ordinary shapes such as zoom in, zoom out, text edit...
I guess I could use an external image to define cursor I like (cf. Change mouse cursor of a widget in gWidgetsRGtk2) but really, I find it hard to believe that RGtk does not ship with a set of sane cursor shapes.
Surely I'm missing something, but where can I find cursors of "normal" shape ?
Related
I need a function that takes two Qt widgets and "links" them such that no matter which one the mouse is hovering over, they both get highlighted with their (standard) hover highlighting (if they have such).
This needs to work with whatever kinds of widgets the caller passes to this function; this function can't require callers to create widget subclasses just to make this work.
Here are some images of what I'm referring to:
Normally, when you hover the cursor over a widget, it gets highlighted as shown in Images 1 and 2. I need an example of how to set things up so that regardless of which widget the mouse is hovering over, they BOTH get highlighted with their standard hover highlighting, as shown in Image 3. Ideally, this function would work generically, only operating on its arguments as QWidgets, regardless of what kind of widgets they actually are (because hover highlighting is a generic Qt behavior, after all).
def link_highlighting(widgetA, widgetB):
... what should go here? ...
This feels like it would involve some pretty dark event hackery, but my event hacking fu is not strong.
Ideas? Suggestions?
I did a bit of research and I see two ways this can be done right now in a generic way.
The first part is detecting the hover action. This should be easy. Just subscribe to the enterEvent and leaveEnvent of both widgets. As long as they are of type QWidget this will work. With that you will be notified when the mouse enter or leaves a widget.
Then the highlighting part. Here you have two options:
You can fake a mouse event on the second widget, basically emulating a second mouse enterEvent. This can be done with qApp.sendEvent(widget, event).
You can change the palette of the second widget. Basically to set the normal palette to the highlighted palette. Here you would use functions like:
palette = widget.getPalette()
palette.setColor(QPalette.Base, widget.palette().color(QPalette.Highlight))
widget.setPalette(palette)
This obviously needs some experimenting. And for now this only works for widget styles that work with paletters. For the ones that work with CSS one would need to basically do the same. Find the bit that applies to highlight and copy it over to the normal state.
Depending on how general your case is, this could be really easy or very hard.
Let me know how this goes.
Is it possible to animate text/object with 'end' in after effects just like you do with strokes? How can I achieve this? See the video and you'll understand what I wan't to achieve.
YouTube - Guy showing the 'end' on a stroke
Cheers,
Tommie
I think I see what you are asking. You want the shapes of a text layer (the actual lines of each character) to actually build on, right? Can't be done like that. Even if you use text and convert to shapes, you are looking at a world of pain because of the way letters are built by most fonts (for one thing, the shapes are actually filled, not stroked -- strokes are outlines).
The only way I would do this is by using the Element 3D plugin in After Effects and Cheetah3D (or whatever 3D tool you want to use). In Cheetah, I'd create the text shapes as extruded 3D text. Then I'd use the "Build" modifier ("Linear" setting) to progressively build the text. Then I'd export that out as an OBJ sequence (script for this is available on cheetah forum site -- I wrote it) and bring that sequence into Element3D and work with it that way. That will work. And as far as I know, that's the only way with a decent amount of control. Wedding video? Just curious. :-)
I'd like to create a button in Qt that is the size and shape of a PNG that I give it. I've tried using a QToolButton with setAutoRaise set to true so that the 3D frame only appears on mouseover and press, but I don't want that 3D frame to extend beyond the PNG. Setting the icon size and/or the button's min and max sizes isn't helping.
In other words, I'd like the functionality of buttons like on (say) iOS, instead of something that one would expect on a Windows dialog box. The chrome that QToolButton provides (the 3D frame) is great and I still want that sort of behavior, but it seems like I'd have to do everything by hand -- ie, draw the mouseover, depressed, and disabled versions of the button.
Is there some way to treat a QToolButton's icon as the entire extents of the button? Or is there another control that I could use instead?
I would like to change the hotspot of a mouse pointer, which we've changed the icon using a .cur file, to be in the bottom right of the image, rather then the top left.
Pretty much like an inverted arrow cursor, the designers/boss have come up with a nice design which almost requires this.
Is it possible to change the hotspot of a mouse cursor on a web page?
I have not tested it, got it from developer.mozilla.org:
Support for the CSS3 syntax for cursor values got added in Gecko 1.8beta3; it therefore works in Firefox 1.5. It allows specifying the coordinates of the cursor's hotspot, which will be clamped to the boundaries of the cursor image. If none are specified, the coordinates of the hotspot are read from the file itself (for CUR and XBM files) or are set to the top left corner of the image. An example of the CSS3 syntax is:
cursor: url(foo.png) 4 12, auto;
Link to CCS3 cursor
It's not possible, and I'm glad - I think you'd only frustrate your users with this.
Edit: I was wrong - I didn't think this was possible - I still don't think you should do it though.
You can't. And as most people here I'd tell you to not do it even if you could...
However, I could imagine something like this for very specific cases like the page of some artist, or for a game cursor, or a sort of 3D-like map with the cursor pointing down. Now if you really need a special cursor for a media oriented site, as opposed to an information site, I'd hide the cursor, with a blank cursor file and use some Javascript to attach a floating image over the cursor so it "looks like" the hot spot is someplace else.
Of course your sites usability and compatibility will go way down, but the solution above is if you really need to take the creative liberty, and your users are open minded to this sort of stuff.
I'm developing a Flex 2 application, and I noticed that part of the library which is responsible for moving GUI windows (TitleWindows) around when you drag them with the mouse gets confused if there is a clickable (buttonMode = true) sprite beneath them. When I say confused, I mean that the window is moved around normally for a while, but then at some point "jumps" into the upper left corner of the flash app, and makes very minor movement there. Then at some other point it jumps back. It is more difficult to explain than to experience, so please go and see for yourself. Here's how to reproduce the problem:
Go to http://www.panocast.com
In the left sidebar, choose "Real Estate"
Just below the bottom right corner of the flash window, choose "high res" by clicking on the rightmost icon.
When (part of) the video loads, click on the staircase. A TitleWindow will pop up.
Try dragging it around the screen. When the mouse cursor is moved above one of the clickable areas (like the staircase), the window is misplaced.
(Sorry, but can't give you a direct link, part of the page is generated dynamically.)
(What's makes the problem even more interesting is that for me, in "low res" mode, the problem does not occur! There is very little difference between the various modes.) I would really appreciate if someone told me what was going on here and how it can be fixed.
I'm not sure if it matters, but the underlying sprite is actually not just plain sprite, rather it is a Papervision3D renderer object with some 3D elements in it. I'm telling this because it is possible that the incorrect mouse coordinates somehow come from the texture UV mapped on the clickable objects.
I've managed to replicate this on the low res mode as well, so I don't think it's related to the resolution.
This looks to be because the MouseEvent is being handled by the TitleWindow AND the Papervision3D window. Perhaps you need to force stopImmediatePropagation() on one or the other? Or maybe switch off the MouseEvent handling for the Pv3D window when the TitleWindow pops up?
That's a tough one to debug without some source; something's apparently calling either move() or setting x and y properties on that TitleWindow and scheduling it be moved.
When I first read the post, it "smelled" like maybe a rotation miscalculation somewhere (using Math.atan vs. Math.atan2 can sometimes have that kind of effect), so you're right, it could have something to do with PaperVision, assuming you're not using Math.atan or setting rotation properties yourself anywhere. Just thought I'd mention it, though it's probably not happening in your case. You never know, though. ;)
More likely the LayoutManager is moving the component in response to a property change on the component. The Flex docs explain that in addition to setting its x and y properties, and explicit calls to move(), a UIComponent's move event can also be triggered when any of the following other properties change:
minWidth
minHeight
maxWidth
maxHeight
explicitWidth
explicitHeight
PaperVision or no, maybe that info might help you isolate the source of the move. Good luck.
I got this figured out. Apparently, this is a Papervision3D problem. There is a class deep inside Papervision3D called VirtualMouse, which is supposed to generate MouseEvents programmatically. This happens, for example, when the user interacts with any of the interactive objects on stage, e.g., a Plane with an interactive material on it (as in my case).
The problem is that the x and y coordinates of the generated event represent texture UV coordinates (just as I suspected) and not real world screen coordinates. When a TitleWindow (or any Panel object) is dragged, a "mouseMove" handler (among others) is added to the SystemManager, which then uses the stageX and stageY properties of the event object to determine the new position of the window. Unfortunately for VirtualMouse's mouse events, these are invalid, since the original x,y coordinates, which are probably used to determine the global stage coordinates are, as I said, not screen coordinates.
Honestly, I'm still unsure whether the events dispatched by VirtualMouse are used anywhere within Papervision3D itself, or they are just offered for convenience, but they sure make it difficult to integrate a viewport into a Flex program. Assuming that such events aren't necessary for PV3D itself, there is a one-liner fix for my problem, which must be added right after the creation of the viewport:
viewport.interactiveSceneManager.virtualMouse.
disableEvent(MouseEvent.MOUSE_MOVE);
BTW., there was a very similar (or rather, as it turns out, the same) bug with dragging sliders, also fixed by this line.