java - rows added selected by default after selecting two rows -
taking example mkorbel example:
i have achieved creating desired behavior using mechanisms suggested mkorbel. works long have 1 row painted green (unselected). if add 1 row, select , add new row, works fine, new unselected row. if add second row , selected painted red correctly, upon adding more rows after second row (two red rows) selected default, , not want. want rows in green until click on them (double click). know why happening? why work long have 1 cell unselected? why if, have more 2 or the, rows selected, keeps adding new rows in selected mode? thnx
my code mouse event follows:
m_list = new jlist<string>(m_listmodel) { private mycellrenderer cellrenderer = new mycellrenderer(); // emulate control down multiple non contiguous selection on // list. @override // todo fix here public void processmouseevent(mouseevent event) { int modifiers = event.getmodifiers() | inputevent.ctrl_mask; m_myme = new mouseevent((component) event.getsource(), event.getid(), event.getwhen(), modifiers, event.getx(), event.gety(), event.getxonscreen(), event.getyonscreen(), event.getclickcount(), event.ispopuptrigger(), event.getbutton()); //if clicked twice if (event.getclickcount() == 2) { //if flag set true consume event if ((mycellrenderer.getflag() == true)) { m_urlname = mycellrenderer.getvalue(); m_myme.consume(); //initiate parsing initiateparsing(); }else{ m_urlname = mycellrenderer.getvalue(); } //if not consume emulate ctrl_mask if (!m_myme.isconsumed()) { super.processmouseevent(m_myme); m_urlname = mycellrenderer.getvalue(); //initiate parsing process initiateparsing(); } } } }; the code in cellrenderer follows:
public static class mycellrenderer extends jlabel implements listcellrenderer { private static final long serialversionuid = 1l; private static boolean myflag = false; private static string thisvalue; public mycellrenderer() { setopaque(true); } public component getlistcellrenderercomponent(jlist list, object value, int index, boolean isselected, boolean cellhasfocus) { settext(value.tostring()); color background = null; color foreground = null; if (isselected == true) { background = color.red; foreground = color.white; myflag = true; } else { background = color.green; foreground = color.black; myflag = false; } setbackground(background); setforeground(foreground); public static class mycellrenderer extends jlabel implements listcellrenderer { private static final long serialversionuid = 1l; private static boolean myflag = false; private static string thisvalue; public mycellrenderer() { setopaque(true); } public component getlistcellrenderercomponent(jlist list, object value, int index, boolean isselected, boolean cellhasfocus) { settext(value.tostring()); color background = null; color foreground = null; if (isselected == true) { background = color.red; foreground = color.white; myflag = true; } else { background = color.green; foreground = color.black; myflag = false; } setbackground(background); setforeground(foreground); // string pointing @ thisvalue = value.tostring(); m_index = index; return this; } public static boolean getflag() { return myflag; } public static string getvalue() { return thisvalue; } }
as commneted in previous question, can use
mouseevent.consume()not inxxxrenderer(i don't want comment something) selection must stored in
xxxmodel, otherwise attemps wrong or in better case caused side effectsfor example, using
model_to_view, ....defaultlistselectionmodel
import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class jlistdisableditemdemo implements itemlistener, runnable { private jframe f = new jframe("colors"); private static final string items[] = {" black ", " blue ", " green ", " orange ", " purple ", " red ", " white ", " yellow "}; private jlist jlist; private jcheckbox[] checkboxes; private boolean[] enabledflags; @override public void run() { jpanel pnlenablers = new jpanel(new gridlayout(0, 1)); pnlenablers.setborder(borderfactory.createtitledborder("enabled items")); checkboxes = new jcheckbox[items.length]; enabledflags = new boolean[items.length]; (int = 0; < items.length; i++) { checkboxes[i] = new jcheckbox(items[i]); checkboxes[i].setselected(true); checkboxes[i].additemlistener(this); enabledflags[i] = true; pnlenablers.add(checkboxes[i]); } jlist = new jlist(items); jlist.setselectionmode(listselectionmodel.single_selection); jlist.setselectionmodel(new disableditemselectionmodel()); jlist.setcellrenderer(new disableditemlistcellrenderer()); jlist.addlistselectionlistener(new listselectionlistener() { @override public void valuechanged(listselectionevent e) { if (!e.getvalueisadjusting()) { system.out.println("selection"); } } }); jscrollpane scroll = new jscrollpane(jlist); scroll.sethorizontalscrollbarpolicy(scrollpaneconstants.horizontal_scrollbar_never); scroll.setverticalscrollbarpolicy(scrollpaneconstants.vertical_scrollbar_always); container contentpane = f.getcontentpane(); contentpane.setlayout(new gridlayout(1, 2)); contentpane.add(pnlenablers); contentpane.add(scroll); f.setdefaultcloseoperation(jframe.exit_on_close); f.setlocation(240, 280); uimanager.put("list.background", color.lightgray); uimanager.put("list.selectionbackground", color.orange); uimanager.put("list.selectionforeground", color.blue); uimanager.put("label.disabledforeground", color.magenta); swingutilities.updatecomponenttreeui(f); f.pack(); javax.swing.swingutilities.invokelater(new runnable() { @override public void run() { f.setvisible(true); } }); } @override public void itemstatechanged(itemevent event) { jcheckbox checkbox = (jcheckbox) event.getsource(); int index = -1; (int = 0; < items.length; i++) { if (items[i].equals(checkbox.gettext())) { index = i; break; } } if (index != -1) { enabledflags[index] = checkbox.isselected(); jlist.repaint(); } } public static void main(string args[]) { swingutilities.invokelater(new jlistdisableditemdemo()); } private class disableditemlistcellrenderer extends defaultlistcellrenderer { private static final long serialversionuid = 1l; @override public component getlistcellrenderercomponent(jlist list, object value, int index, boolean isselected, boolean cellhasfocus) { component comp = super.getlistcellrenderercomponent(list, value, index, false, false); jcomponent jc = (jcomponent) comp; if (enabledflags[index]) { if (isselected & cellhasfocus) { comp.setforeground(color.black); comp.setbackground(color.red); } else { comp.setforeground(color.blue); } if (!isselected) { if ((value.tostring()).trim().equals("yellow")) { comp.setforeground(color.orange); comp.setbackground(color.magenta); } } return comp; } comp.setenabled(false); return comp; } } private class disableditemselectionmodel extends defaultlistselectionmodel { private static final long serialversionuid = 1l; @override public void setselectioninterval(int index0, int index1) { if (enabledflags[index0]) { super.setselectioninterval(index0, index0); } else { /* * selected index before one, * walk forward find next selectable item. */ if (getanchorselectionindex() < index0) { (int = index0; < enabledflags.length; i++) { if (enabledflags[i]) { super.setselectioninterval(i, i); return; } } } /* * otherwise, walk backward find next selectable item. */ else { (int = index0; >= 0; i--) { if (enabledflags[i]) { super.setselectioninterval(i, i); return; } } } } } } }
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