When I type inside one of JavaFX's TextFields, the text doesn't go all the way from one side to the other, it sort of cuts off early. I guess there is some sort of padding inside the TextField that prevents the text from taking up the whole space. How can I make this go away? I tried CSS but I couldn't find any attributes to change this.
The reason I need this fixed is I am writing a program where the user types in their initials, and they put one initial in each TextField. The problem is that in order for a single letter to be visible the TextField has to be about 30 pixels wide at least, and it looks too bulky and annoying at that size.
How can I get rid of this padding? If I can't then what are some possible alternatives?
textfield.setStyle("-fx-padding: 0.333333em 0 0.333333em 0;");
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I want to have a page which has two main components. On the upper half a textarea on the lower half some input fields. The split should be 50:50. The problem I'm facing:
I cannot tell the textarea to fill the complete height when displayed. I know I can use some cdk..MinRows or ...MaxRows but therefore I need to know the whole height before. Additionally the underline looks also quite strange, e.g.
How to fix it? Does it work with Material or should I use plain HTML textarea? My project
I've noticed that the default behaviour for a DataGrid's vertical scroll bar is to scroll one row at a time. This is all well and good when the rows are all uniform and small (e.g. displaying a single line of text), but gets really ugly as soon as you have rows with variable heights.
I'm curious, is there a way to make DataGrid scrolling "smooth"? For instance, is there a way to have the DataGrid scroll by a set number of pixels, lines of text, etc. rather than scrolling one row at a time?
So far, the only solution I've managed to come up with is to place the DataGrid in a Canvas and have the Canvas do the scrolling instead of the DataGrid. The issue with this approach, though, is that as soon as the Canvas scrolls far enough, the DataGrid headers scroll off-screen. Ideally, I'd like to get the smooth-scrolling nature of the Canvas, but also keep the DataGrid headers visible. Is that possible?
The way that ItemRenderer's work in Flex 3 makes smooth scrolling difficult to achieve. Basically Flex recycles item renderers scrolled off of the top of the list as the display objects used for new data at the bottom of the list. Adobe's implementation of most list components in Flex 3 creates and adds these items as they come on to the screen rather than just off the screen, so they "pop in" and smooth scrolling isn't available. I'm not sure why they couldn't have done it in a similar manner for items +/- one position above or below the current scroll pane, but they didn't, and we're stuck with sticky scrolling by default.
Work-arounds do exist, though the one you've noted (dropping the datagrid into a canvas) negates the display-object saving intention of item renderers and incurs a performance cost. This will be fixed for most list-based Flex components in Flex 4, though it won't be fixed immediately for DataGrid. The DataGrid / AdvancedDataGrid component is maintained by a separate team based in India, last time I heard, and so it tends to be a bit behind the rest of the SDK.
I'd recommend trying something similar to this implementation of a smooth-scrolling list by Alex Harui. I'm not sure exactly how well it'd work for DataGrid or AdvancedDataGrid, but this is the most intuitive technique I can think of for making the list scroll correctly.
Try this... It's still based on Alex's code that was mentioned above. His should still be a great start for removing the snap-to-row behavior. Original source:
http://blogs.adobe.com/aharui/2008/03/smooth_scrolling_list.html
Alex's original some code for smooth vertical scrolling but that was not an issue I had with the DataGrid. It was smooth scrolling horizontally that I needed. I am using the DataGrid in an unorthodox manner for analyzing plain text reports output by our database (great way of providing visual feedback on a document). The code below allows content to go off screen and the user can scroll without that snap-to-column behavior.
You can adapt this to use the same math routines for vertical scrolling and then it will make scrolling possible and ignore the snap to row behavior. In particular switch the usage of the listContent.move method to move the contents vertically and use a inverse of the rounded pixel value you calculate from the vertical scroll bar (as opposed to my using the horizontal).
This method is bit simpler than Alex's method from the link above - a lot less code so try adapting and see how it works.
override protected function scrollHandler(event:Event):void
{
// Override the default scroll behavior to provide smooth horizontal scrolling and not the usual "snap-to-column" behavior
var scrEvt:ScrollEvent = event as ScrollEvent;
if(scrEvt.direction == ScrollEventDirection.HORIZONTAL) {
// Get individual components of a scroll bar for measuring and get a horizontal position to use
var scrDownArrow:DisplayObject = horizontalScrollBar.getChildAt(3);
var sctThumb:DisplayObject = horizontalScrollBar.getChildAt(2);
// I replaced maxHorizontalScrollPosition in Alex's code with "1300" to fix my exact application. In other situations you may finding using some property or different value is more appropriate. Don't rely on my choice.
var hPos:Number = Math.round((sctThumb.y - scrDownArrow.height) / (scrDownArrow.y - sctThumb.height - scrDownArrow.height) * 1300);
// Inverse the position to scroll the content to the left for large reports
listContent.move(hPos * -1, listContent.y);
}
// Go ahead and use the default handler for vertical scrolling
else {
super.scrollHandler(event);
}
}
For those of you who haven't been reading my Qt questoins, I am learning Qt for a project. I have only limited experience with GUI design at all, and not in Qt.
I've got a horizontal layout that I want to populate with some buttons. I can feed these buttons in just fine, but my formerly-square buttons are stretched horizontally to take up more space.
I want to let the layout manager determine the best way to size these buttons, but I also want their original proportions to remain intact. For instance, if I start would with 32X32 buttons that need to shrink to fit all of them in the layout, I want them to shrink proportionally so that the width to height scale is maintained. 20X20, 16X16, 12X12 would all be just fine, but 24X16 would be an example of dimensions that are unacceptable.
I've tinkered with size policies on the buttons and stretch options. I'm not seeing, even after reading the QPushButton and QHboxLayout classes how to do this. How is it accomplished?
Thanks.
As long as I understand the question correctly, I think what you want is QBoxLayout::addStretch(). This will add a spacer object that fills the unused space. So the buttons will have their ideal size and the spacer will fill the rest. You can try experimenting with this in Designer, it's easier than the write/compile/run cycle.
You should take a look at the answers to this question. This is a recap of my answer there.
You need to create a custom derivative of QLayoutItem, which overrides bool hasHeightForWidth() and int heightForWidth( int width ) to preserve the aspect ratio. You could either pass the button in and query it, or you could just set the ratio directly. You'll also need to make sure the widget() function returns a pointer to the proper button.
Once that is done, you can add a layout item to a layout in the same manner you would a widget. So when your button gets added, change it to use your custom layout item class.
I haven't actually tested any of this, so it is a theoretical solution at this point. I don't know of any way to do this solution through designer, if that was desired.
Take a look at this demo, how do they accomplish the Inline Changes feature? To me it looks like they are floating a movieclip over the textarea.
What I can't figure out is how they anchored the movieclip to stay in the correct position. If you type something before the movieclip it moves position along with the text, the movieclips even move to the next line when the text word wraps. Does anyone have an idea?
What I think they're doing is keeping track of the index the sprite is representing. Then they have a nice function that moves the sprite to the correct position given the size of the textbox and font. All you need to do after that is bind the positioning function to changes made to the textbox and you've got that effect. Doesn't seem too complicated, as there are already font size/position functions available.
EDIT: Notice how you cannot type code in between the overlapping regions.
I am designing a page to Add/Edit users - I used a repeater control and a table to display users. In users view the individual columns of the table row have labels to display a record values and when users click on edit button, the labels are hidden and text boxes are displayed for users to edit values - The problem is - as soon as the text boxes are visible, the table size increases - the row height and cells size becomes large. Is there a way to display the text boxes so that they take the same size as the labels
Dealing with tables, the question is: can your labels span on multiple text rows (ie: can you have long texts)? If yes, you may encounter layout problems any way. If no, a simple approach can be creating a CSS Class:
.CellContent { display:block; width: ...; height: ...; }
with your preferred cell width/height. Just stay a bit "large" with your height.
Assign the class to both your label and textbox, and you should not get width/height changes when switching control (thanks to the display:block property).
Again, if you have long texts, you will still encounter issues, and may want to use multilines. In that case, I would suggest ignoring height problems: just set the width to be consistent, and always show a 3-4 lines textbox for editing. Users will not be bothered to see a row height change, if they are ready to type long texts.
I'd use JS+CSS... You'll have to get your hands dirty for this one though. Visual Studio isn't going to help you much.
Here's how I'd do it:
Get the <td> clientWidth and clientHeight.
Set the <td>'s width and height to those px values (so they're no longer relative)
Swap the text for the input
In your CSS, make sure the input has no padding/margin/border and set width:100%, line-height:1em, and height:1em
When you switch back, make sure you un-set the <td> width and height so they return to automatic values.
You'll need to tweak this all slightly. I'm sure you'll have to play around with the padding on the <td> and perhaps set overflow:hidden but you should be able to do what you want.