As the title says, is there a way to change the text selection cursor? Changing the cursor in CSS (eg. cursor: hand) just changes the normal cursor.
I suppose you mean “cursor” in the old sense–the thing that appears in editable text to indicate the location where text is to be inserted or where text deletion or insertion is to take place. Its appearance is, in modern systems, typically a blinking (appearing and disappearing) thin vertical line. I’m afraid there isn’t a way to change it, even as planned or proposed. If there were, I would expect to find it in the CSS3 Basic User Interface Module, where the cursor property is defined.
The CSS specifications and drafts reflect a new meaning for “cursor,” namely something that used to the called “pointer.” For further confusion, one of the possible values for cursor is pointer (typically, appearing as a hand).
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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.
I have been trying to disable scroll bars in a text area using the code:
ScrollBar scrollBarv = (ScrollBar)textArea.lookup(".scroll-bar:vertical");
scrollBarv.setDisable(true);
But all I get is a null pointer for "scrollBarv". What am I missing?
You can't disable a scroll bar in a text area via lookups like you are trying to do.
A lookup is CSS based, which usually means it will only work after a CSS application pass has been applied. Generally, for a lookup to work as expected, a layout pass also needs to be applied on the parent node or scene. The logic in the JavaFX layout handlers for complex nodes such as controls may modify the CSS and nodes for the controls.
To understand how to apply CSS and perform a layout pass, read the relevant applyCss() documentation.
So you could do this:
textArea.applyCss();
textArea.layout();
ScrollBar scrollBarv = (ScrollBar)textArea.lookup(".scroll-bar:vertical");
scrollBarv.setDisable(true);
But even then, it would not do what you want. Because it is just a one-time call. If the user types new text into an empty TextArea until it fills the area, then a scroll bar will show up, and if the user deletes text in the text area, the scroll bar will be removed. And the new scroll bar which shows up wouldn't be found when you did your lookup because it would not have existed at that time.
Generally, the preferred alternative to performing lookups to nodes is to apply CSS style classes with the style class defining the desired attributes of the node regardless of the state it is in (and using psuedo-classes if state based CSS definitions are required). However, that probably won't work in this case as I can't see a definition for a disable attribute in the JavaFX CSS reference guide. Perhaps you might manage what you need via the visibility property, though that is unlikely as visibility is a bit different from disable.
The behavior for controlling the scroll bars is internally coded in the TextAreaSkin (which in Java 8 is not part of the public JavaFX API). You could copy or subclass the TextAreaSkin to customize its behavior and then attach your customized skin to your node. This is really the "proper" way to customize internal control behavior in the way in which you wish. A discussion of the detailed steps to achieve this is outside the scope of this answer.
But, in the end, I'm not sure how useful the behavior you desire is. Rather than disabling the vertical scroll bar, you could just disable the entire TextArea, which would be fine for most similar use-cases. Though, perhaps your use-case is different somehow in requiring only the vertical scroll bar to be disabled.
I am creating a page in asp.net. I am trying to show some information in tabular format when user hovers on a inout button. To do this, I am setting alt attribute to input type button because it should be javascript independent. I tried creating a table and assigning it to the alt attribute as a text.
<input type="button" value="save" alt="<table><tr><td>some info </td></tr>
<tr><td>some other info </td></tr></table>"/>
But it is not displayed as a table with two ros. Instead it is displayed as a single line.
Is there any way to show it in tabular format?
This is not possible just like this. Alt can be just plain text.
You'll have to use JavaScript. Try to google for it :)
You'll have to:
Create table.
Using CSS, set it's position to absolute, near your control and display: none
On item hover, you have to set display: block.
Best for this kind of behavior is to use some Javascript framework, IE jquery
jquery.com
specially read these:
http://api.jquery.com/hover/
http://api.jquery.com/hide/
http://api.jquery.com/show/
Agreed with Ales, Javascript would make this a breeze. YUI's Tooltip allows you to instantiate a Tooltip associated with an element, or set of elements (changing the Tooltip's context, so in case you have many similar behaviours spread across a screen).
http://developer.yahoo.com/yui/examples/container/index.html
Once you have instantiated the Tooltip, its something like Tooltip.setBody("your HTML code");, though by default Tooltip sucks in title text of an <a> tag as its content, or possibly even alt text of an element - not 100% on the alt text default part though - good chance that if it doesn't do it by default, if you grab the alt attribute contents it will display it correctly inside the Tooltip.
Others have already told you that what you've asked for isn't possible, as HTML attributes must be plain text, not more HTML.
They've also told you that there are Javascript and JQuery libraries which will help you do what you're wanting to do. There are loads of scripts you could use, here's a link to one that you might want to try: http://bassistance.de/jquery-plugins/jquery-plugin-tooltip/
However, I feel I should add one further point which others have missed, and which is actually quite important:
You're using the wrong attribute.
The alt attribute is not the correct attribute to use for a hover tooltip effect. You should be using the title attribute for this.
Using alt works this way for historic reasons in some browsers (I believe it works in IE, but not much else), but it is not intended as a tooltip. The correct use of alt is for a small bit of descriptive text that will appear if the image is not loaded. This could be because the file failed to load, or the user has images turned off, or the user has a text-to-speech browser, etc, but if the image is displayed, then this text should never be displayed.
The title attribute on the other hand is intended to be displayed, and all browsers implement it as a tooltip (in fact, it's not just on <img> tags; you can use title for any element).
Hope that helps.
...regardless of font size.
Its an mx:Text object. (The Text object is actually being used as a mask so don't know if that's the problem.) If underline is set with the <u> tag in Text.htmlText, or Text.textField.setTextFormat, the underline thickness is always just one pixel which is not acceptable. (There are other problems with <u> so I'm limited to using setTextFormat currently.)
Can the thickness of an underline be set through CSS? (textField.styleSheet, etc.)
I may have another problem as I already use setTextFormat extensively, and the documentation says you can't use textField.setTextFormat if you use textField.setStyleSheet.
I primarily need the underline to simulate correctly the look for an anchor tag.
its not even possible to do in html (you need to use border-bottom). i don't think this is possible.
Not possible with CSS or TextFormat.
A possible workaround would be using the textfield metrics (probably through getCharBoundaries()) to manually draw a line under the desired text. It can get quite messy for multiline text though.
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.