I have a JTable inside of a JScrollPane. I want to get the columns to stay fixed when I resize it. The rows stay the same size, and there is a scrollbar to move up and down. I can't get the scrollbar to work the same way on the vertical though.
Here is a picture of my project, where the y axis of Duke is perfectly normal, and has a scrollbar to scroll to the bottom of the image, the horizontal part is clearly messed up, and should not have expanded that far.
Also, if the frame was made smaller horizontally, there should be a scrollbar just like the vertical.
So my question basically ends up like this; How do you fix the size of a JTable to not resize within the JScrollPane, and then if it's too large for it, display scroll bars.
Btw, Each cell has an image, making up the big image.
Set the table's auto resize mode to "off"
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
Take a look at JTable#setAutoResizeMode for more details.
Update
I should mention, this will mean you will become responsible for determine the size of each column.
Take a look at How to use tables and Setting and Changing Column Widths
Related
In Grid component when I try to resize frozen column too much it goes out of the grid and there is no way I can resize it back to its initial positionThis is an example from Vaadin sampler.
Is there any way I can prevent frozen columns from extending out of the grid?
I tried to call setMaximumWidth() on frozen columns however this seems to not work on columns that are being resized.
Sounds like the manual column resizing is not respecting the maximum width, so it's a bug in Grid.
I have a list in a scrollpane. The list fills with Strings that are longer than the list viewport, so I get horizontal scrolling OK. When I tried to add a columnheaderviewport with a label, that viewport won't scroll with the main viewport. It tries to scroll, flashing where the label text should be, but immediately returning to the default size/view.
Is using a column header only for scrollpanes with tables inside? That's the only examples I can find on the 'net. The java doc tutorials say nothing about tables only, and the column header should track the main viewport.
I'm using JDK 1.7 and Netbeans 8.0.
In the process of writing a small example, I inadvertently increased the amount of text in the label to more than what the label would display. Then the viewport started scrolling, tracking the main viewport scroll. I had read that the component in the column header viewport had to be same width as the main viewport, but apparently it's the content, not the component size that matters.
So, yes, a column header viewport can be scrollable with a list, not just tables.
After starting a JPanel using GridLayout(4,4) i insert a JLabel (and attach an imageicon to it) inside every grid cell with size of (150,150).
when i resize the JLabel to size (100,100) the image get cropped (which is perfectly fine by me), but i get a wierd looking grid (imaged added at the end).
if this helps: i dont actually resize the window, i just need to make sure the the size of the JLabel is set to (100,100) always, no metter what is the original image size.
before:
http://postimg.org/image/iolyeb8e7/
after:
http://postimg.org/image/5j6g87ein/
thanks
Unfortunately you did not say what you expect the grid to look like. I assume you don't want the cells to be so far apart from each other.
The GridLayout documentation states that...
The container is divided into equal-sized rectangles, and one component is placed in each rectangle.
If you shrink the size of each JLabel (i.e. the components in each of those rectangles) you just do that. You shrink the size of the component, not that of the rectangle. The grid does not care if the component is to small to fill the whole rectangle. At the moment you add the component to the grid1, the grid tries to set the components size to best fit the available space. But if you later change the labels size, the grid does not care.
What you probably want is to change the size of the whole grid: If you set the grids size to 400 by 400 it should evenly divide it to all 4 rows and 4 columns, so you get rectangles of size 100 by 100. All labels should automatically be sized accordingly.
1 Probably it is not exactly while adding the labels but while validating the container, but I don't know all the internal details about how and when layouts do there magic.
I have a GridLayout I'm making which is populated with a bunch of pictures. The GridLayout itself is set to SizeFull(), as is each individual image in the grid.
The grid with the pictures is within another grid, and that grid has relative sizes set.
With this set up, the grid of pictures stays within the spot I want it to, properly resizing to fit within the space they should, but the pictures do not retain their proper square proportions. They squish fat or skinny however they want. I want them to retain the original proportions, though, so they expand to fill their available area as much as possible while retaining those proportions.
If I set the width to 100%, or the height to 100%, and leave the other undefined, then it retains the proportions, and properly expands to fit the one that is set to 100%, but the other spills outside the nested grid layout's spot in the upper grid layout.
Anyone know how to do this?
Have you tried setting the width and height as percentage?
So on an image of 80 by 120 pixels:
setWidth(66, Unit.PERCENTAGE)
setHeight(100, Unit.PERCENTAGE)
I have a JPanel which I'm placing inside of a JScrollPane. I am manually painting it using paintComponent(), since it's being used as a canvas, and I want the panel to automatically fit to the width of the scroll pane. I can then use getWidth() in the painting code to automatically scale to fit the container. However, I want to be able to manually set the preferred height so the I make use of the scroll pane's vertical scrolling capabilities.
What's the best way to do this? This would obviously still work if I was just able to get the width of the scroll pane in the painting code, but I don't want to break encapsulation too much with hacky code like getParent().
Let your panel implement Scrollable: the getScrollableTracksViewportWidth/Height control how the viewport handles the sizing in the horizontal/vertical dimension, respectively. A value of true indicates that the component is forced to the same size as viewport (that is, no scrolling in that direction), so getWidth() can be consistently used for scaling.
I would get your paint code to use the horiz width of itself as the basis for painting.
Then set the scroll pane so it never scrolls horizontally, only vertically.
Is this good enough ? Seems too simple now I've typed it out !