jtoolbar

问题 Why JMenuBar is not place in the content pane?is there any reason or effects when make a java gui program especially when using jframe? Thanks 回答1: As stated in Using Top-Level Containers article, the manu bar is managed by the Root Pane: Each top-level container relies on a reclusive intermediate container called the root pane. The root pane manages the content pane and the menu bar, along with a couple of other containers. You generally don't need to know about root panes to use Swing

问题 Why JMenuBar is not place in the content pane?is there any reason or effects when make a java gui program especially when using jframe? Thanks 回答1: As stated in Using Top-Level Containers article, the manu bar is managed by the Root Pane: Each top-level container relies on a reclusive intermediate container called the root pane. The root pane manages the content pane and the menu bar, along with a couple of other containers. You generally don't need to know about root panes to use Swing

问题 Why JMenuBar is not place in the content pane?is there any reason or effects when make a java gui program especially when using jframe? Thanks 回答1: As stated in Using Top-Level Containers article, the manu bar is managed by the Root Pane: Each top-level container relies on a reclusive intermediate container called the root pane. The root pane manages the content pane and the menu bar, along with a couple of other containers. You generally don't need to know about root panes to use Swing

问题 I'm using a customized JToolbar using the following code: public class GeneralToolbar extends JToolBar{ public GeneralToolbar() { super(); setBackground(Color.white); setOpaque(true); setPreferredSize(new Dimension(54,54)); setMinimumSize(new Dimension(54,54)); setMaximumSize(new Dimension(54,54)); setSize(new Dimension(54,54)); } public void paintComponent(Graphics g) { super.paintComponent(g); Dimension size = this.getSize(); ImageIcon image = DefaultAction.createImageIcon("/com/aaa

问题 I have created JToolBar (Java Swing). I have set a Background image on frame which contains JToolBar . I want my JToolBar to be transparent so that the image kept on frame should be visible. I am using setOpaque(false) but it is not having any effect on my toolbar.. Has anyone delt with this before? My Code is as follows import javax.swing.ImageIcon; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class NewJFrame extends javax.swing.JFrame { static

问题 I'm new to Swing and I currently work on some sort of graphic editor. First I started implementing the toolbar (class OptionsBar) as an extended JPanel. Everything looked fine(image below), but it didn't work as a toolbar (it wasn't always focused). Then I found out that there actually exists a JToolBar element, so I replaced "extends JPanel" with "extends JToolBar". I look thorugh toolbar specifications. It seemed like I should change anything. The problem is that the toolbar is transparent

问题 I am creating an window with a JToolBar containing two buttons. One is a regular JButton and the other is a BasicArrowButton ( javax.swing.plaf.basic.BasicArrowButton ). Without doing any additional configuration, the JButton does not expand in the toolbar, but the BasicArrowButton expands to occupy the complete toolbar. I have tried to configure it to fit in a small 16x16 square by setting its maximum and preferred size to 16x16. But that doesn't work. Also tried using setSize() without

问题 I am trying to add a icon to a toolbar but what is the best place to put it in? My desktop or should I make a new file in the project file or add all the pictures in because it is not showing and this is my code: JToolBar toolBar = new JToolBar(); String[] iconFiles = {"pen-icon","",""}; String[] buttonLabels = {"New","Open","Save"}; icon = new ImageIcon[iconFiles.length]; Obutton = new JButton[buttonLabels.length]; for (int i = 0; i < buttonLabels.length; ++i) { icon[i] = new ImageIcon

问题 Is there a way to have an arrow (like ) in JToolBar (API) when the visible container is smaller than the space all the buttons need? (For illustration purposes see WebUI zkoss) The UI manager (L&F) should be the normal one of swing. 回答1: Is there a way to have an arrow It is not part of the API, so you will need to create your own. You might be able to use the following to give you some ideas. This examples adds buttons to the left/right when there is not enough space for all the buttons so

问题 I found three ways to fill my JFrame frame = new JFrame("...") createContentPanel returns a JPanel and createToolBar returns a ToolBar. frame.add(this.createToolBar(), BorderLayout.PAGE_START); //this works and puts the ToolBar above and the ContentPanel under it<br> frame.add(this.createContentPanel(), BorderLayout.CENTER); frame.setContentPane(this.createContentPanel()); //this lets the JToolBar hover over the ContentPanel frame.getContentPane().add(this.createToolBar()); frame