jpanel - Java JScrollPane ve -


i want make java-code, can insert many panels want. can scroll down see panels. i'm far right now: problem is, can't scroll down. tested jscrollpane jtextareas worked fine.

picture of program

package test;  import java.awt.*; import javax.swing.*;  public class scrollbar {      public static void main(string[] args) {         jframe frame = new jframe();         jpanel panel = new jpanel();         jpanel panel1 = new jpanel();         jpanel panel2 = new jpanel();         jpanel panel3 = new jpanel();         jtextfield tfid = new jtextfield("id: ", 5);         jtextfield tfname = new jtextfield("name: ", 5);         jtextfield tfhersteller = new jtextfield("hersteller: ", 5);         jtextfield tfid2 = new jtextfield("id: ", 5);         jtextfield tfname2 = new jtextfield("name: ", 5);         jtextfield tfhersteller2 = new jtextfield("hersteller: ", 5);         jtextfield tfid3 = new jtextfield("id: ", 5);         jtextfield tfname3 = new jtextfield("name: ", 5);         jtextfield tfhersteller3 = new jtextfield("hersteller: ", 5);          frame.setsize(400, 400);         frame.setdefaultcloseoperation(jframe.exit_on_close);         frame.setlayout(new flowlayout());          panel.setlayout(new flowlayout());         panel.setpreferredsize(new dimension(200, 85));         panel.add(panel1);         panel.add(panel2);         panel.add(panel3);         jscrollpane scrollpanel = new jscrollpane(panel, jscrollpane.vertical_scrollbar_always, jscrollpane.horizontal_scrollbar_always);          panel1.setlayout(new flowlayout());         panel1.add(tfid);         panel1.add(tfname);         panel1.add(tfhersteller);          panel2.setlayout(new flowlayout());         panel2.add(tfid2);         panel2.add(tfname2);         panel2.add(tfhersteller2);          panel3.setlayout(new flowlayout());         panel3.add(tfid3);         panel3.add(tfname3);         panel3.add(tfhersteller3);          frame.add(scrollpanel);         frame.setvisible(true);     } }

you over-using flowlayout.

different layouts have diferent behaviors. first, need remove line:

frame.setlayout(new flowlayout());

the default layout frame’s content pane borderlayout. want leave way, because component added borderlayout no constraints placed in center, stretch fill entire space.

second, want remove these:

panel.setlayout(new flowlayout()); panel.setpreferredsize(new dimension(200, 85));

setting preferred size interferes jscrollpane’s ability manage view (that is, panel). when want have components appear on multiple rows, should try force flowlayout constraining width; rather, use layout designed place components on different rows. best choice gridbaglayout:

panel.setlayout(new gridbaglayout()); gridbagconstraints gbc = new gridbagconstraints(); gbc.gridwidth = gridbagconstraints.remainder; panel.add(panel1, gbc); panel.add(panel2, gbc); gbc.weighty = 1; gbc.anchor = gridbagconstraints.north; panel.add(panel3, gbc);

the use of gridbagconstraints.remainder in constraint tell gridbaglayout make child component take entire row.

the use of weighty = 1 tells gridbaglayout grid cell of child added should take vertical space, when panel larger children. finally, gridbagconstraints.north keeps child placed @ top of stretched grid cell, no matter how high grid cell is.


Comments

Post a Comment

Popular posts from this blog

neo4j - finding mutual friends in a cypher statement starting with three or more persons -

Image
i trying build cypher statement neo4j know 2-n starting nodes name , need find node (if any) can reached of starting nodes. at first tought similar "mutual friend" situation handled (start1)-[*..2]->(main)<-[*..2]-(start2) in case have more 2 starting points around 6 know name. so puzzled how can include third, fourth , on node cypher able find commmon root amongst them. in above example neo4j website need path starting 'dilshad', 'becky' , 'cesar' check if have common friend (anders) excluding 'filipa' , 'emil' not friends of three. so far create statement programmatically looks like match (start1 {name:'person1'}), (start2 {name:'person2'}), (start3 {name: 'person3'}), (main) (start1)-[*..2]->(main) , (start2)-[*..2]->(main) , (start3)-[*..2]->(main) return distinct main but wondering if there more elegant / efficient way in cypher possibly use list of names parameter ...
Read more

php - How to remove letter in front of the word laravel -

Image
based on picture above result of var_dump() , dd() of same variable ,when var_dump() , apostrophe (') symbol in black diamond of question mark , when dd() same variable , apostrophe can seen letter 'b' appear in front of words what want can me result : loreal's sdn bhd and @ same time want remove special character ( excluding these 4 symbols (-) ,(_) ,('),(,) ) simply escape special character resolve issue. mysqli_real_escape_string resolve issue. $name = mysqli_real_escape_string($request()->user); or use addslashes function() $name = addslashes($request()->user);
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more