I am designing a large form with the Eclipse WindowBuilder plugin. The class extends JPanel and uses GridBagLayout as its LayoutManager.
Now my panel has become vertically larger than my screen size and I cannot make the JPanel any larger by dragging its borders.
How can I vertically extend the JPanel so it's still usabe with WindowBuilder?
Now my panel has become vertically larger than my screen size and I
cannot make the JPanel any larger by dragging its borders.
How can I vertically extend the JPanel so it's still usabe with
WindowBuilder?
put JPanel to the JScrollPane
Related
I am attempting to code a JFrame containing a JPanel. Within the JPanel is an array of JTextField's. So, my GUI looks like:-
I am not using a layout manager, and have set this to null for the JFrame and the JPanel. I am sizing these components by hand.
You can see that the right hand portion of the JPanel is chopped off, even though I have used the same sizing as the containing JFrame.
The code appears as below:-
I have calculated the required width of the JPanel by multiplying the number of columns in the JTextField array by the width of the JTextField. Aside from that would need to be added the width of each gap between the JTextFields (there would be (columnNumber - 1) of them), as well as the two border gaps.
I have done this, yet the right hand side border gap is chopped off, as you can see from the diagram.
If I add some random amount to the panelWidth, then you can see the right hand gap there, but my question is what am I missing here? This ought to work surely, if the JFrame side and the JPanel size are identical, which they are as I have also printed them both out, and the print outs give the same number.
Jeremy
I want for any combination of row/column values to allow a constant vertical & horizontal distance between each JTextField, and for each of those text fields to maintain default sizing.
The GridLayout allows you to specify a horizontal/vertical gap between each component and allows you to control the size of the grid.
Then you can wrap the panel using a GridLayout in a panel that respects the size of the grid.
For example you could do:
JPanel grid = new JPanel( new GridLayout(...) );
JPanel wrapper = new JPanel( new GridBagLayout() );
wrapper.add(grid, new GridBagConstraints());
frame.add(wrapper, BorderLayout.CENTER);
If you pack the frame, the grid panel will be displayed at is preferred size.
If you resize the frame the grid panel will remain centered in the wrapper panel.
The top part of that GUI is well suited to a grid layout, the bottom part with 'Go / Cancel' buttons - a flow layout. Put the grid layout in the CENTER of a border layout, the flow layout in the PAGE_END, pack the top level container (for non-cropped, 'right size') & the job is done.
It might end up looking something like this:
Currently, I have a full screen JFrame. Within that JFrame, is a panel called MainPanel which is 1280 by 640, a portion of the full screen game. The MainPanel is where my game is rendered to. Is there any way to scale this MainPanel to fit JFrame without having to adjust all the component sizes of sprites and such? I'm thinking of rendering MainPanel to an image and drawing it over JFrame, but I do not know how to go about this.
Thanks.
By default, the layout manager of a JFrame is BorderLayout, and adding a JPanel to it without any arguments will place it in CENTER, which will automatically scale to the size of the JFrame. It will ignore any size you have given the JPanel.
I have multiply smaller JPanels which are then added to a bigger JPanel which is the same size as JFrame. Now I want to make those smaller JPanels transparent and the image I have added to the bigger JPanel showing in the background. I tried using setOpaque(true) on the smaller JPanels but it does not show the image that I have added to the bigger JPanel. I hope you understood my problem.
I have a JPanel inside a JScrollPane, where I draw some shapes with Graphics.
The problem is when I draw outside the bounds of the panel, the scroll in the scroll pane doesn't work. I have autoresize activated on the JPanel.
Any tip?
The custom painted JPanel should return a preferred size appropriate for the graphic elements it contains.
I have a Jscrollpane with a Jpanel inside. In this Jpanel I draw some shapes. The problem I have is when I scroll up and down. The drawing on the Jpanel appears cut. So I want to redraw the Jpanel every time I drag the scrollbar or click the direction arrows. How can I do it?
(Excuse me for not posting a SCCE, I've generated the interface with netbeans and it's quite complicated)
In this Jpanel I draw some shapes. The problem I have is when I scroll
up and down. The drawing on the Jpanel appears cut. So I want to
redraw the Jpanel every time I drag the scrollbar or click the
direction arrows.
good idea in the case that you repainting concrete Rectangle, Dimension for this Rectangle returns JViewport
I have a Jscrollpane with a Jpanel inside. In this Jpanel I draw some
shapes. The problem I have is when I scroll up and down.
use AdjustmentListener added to JScrollBar (derived directly from JScrollPane or as local variable)