java - ComboBox as a CellRenderer of JTable -
i want draw several jtables, each of has combobox cell renderer. each cell in each table represents list of data items , want list displayed each time click on combobox arrow. problem combobox not react mouse clicks, i.e. drop-down list not appear.
how can activate drop boxes?
i added below picture of gui , code.
i new java.swing. highly appreciated.
// code borrowed how add checkbox , combobox in table cell?
import java.awt.borderlayout; import java.awt.color; import java.awt.component; import java.awt.dimension; import java.awt.gridlayout; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.awt.event.mouseadapter; import java.awt.event.mouseevent; import java.util.eventobject; import javax.swing.jcombobox; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import javax.swing.jscrollpane; import javax.swing.jtable; import javax.swing.border.lineborder; import javax.swing.event.celleditorlistener; import javax.swing.event.changeevent; import javax.swing.table.abstracttablemodel; import javax.swing.table.tablecelleditor; import javax.swing.table.tablecellrenderer; public class mygui extends jpanel { private int _ntables; private int _nrows; private int _ncols; private string[] _tableinfo; private string[][][][] _clusters; private string[][][][] _clustersintersections; public mygui(int ntables, int nrows, int ncols, string[] tableinfo, string[][][][] clusters, string[][][][] clustersintersections) { super(); _ntables = ntables; _nrows = nrows; _ncols = ncols; _clusters = clusters; _clustersintersections = clustersintersections; gridlayout layout = new gridlayout(0, 2); layout.sethgap(30); layout.setvgap(30); setlayout(layout); for(int t=0; t<_ntables; t++){ jpanel innerpanel = new jpanel(new borderlayout()); innerpanel.setborder(new lineborder(color.black)); jlabel label = new jlabel(tableinfo[t]); label.setopaque(true); label.setbackground(color.white); innerpanel.add(label, borderlayout.page_start); jtable table = new jtable(new mymodel(_nrows, _ncols, _clusters[t], _clustersintersections[t])); table.setborder(new lineborder(color.black)); table.setminimumsize(new dimension(300,80)); table.setmaximumsize(new dimension(300,80)); table.setrowheight(36); table.setfillsviewportheight(true); table.setcellselectionenabled(true); for(int c=0; c<ncols; c++){ table.getcolumnmodel().getcolumn(c).setcellrenderer(new comboboxcellrenderer()); } innerpanel.add(table, borderlayout.page_end); add(innerpanel); } } class mymodel extends abstracttablemodel{ int _nrows; int _ncols; string[][][] _clusters; string[][][] _clustersintersections; mymodel(int nrows, int ncols, string[][][] clusters, string[][][] clustersintersections){ _nrows = nrows; _ncols = ncols; _clusters = clusters; _clustersintersections = clustersintersections; } public int getcolumncount() { return _ncols; } public int getrowcount() { return _nrows; } public object getvalueat(int row, int col) { return _clusters[row][col]; } public object getadditionalinfo(int row, int col) { return _clustersintersections[row][col]; } public class getcolumnclass(int c) { return getvalueat(0, c).getclass(); } } class comboboxpanel extends jpanel { protected jcombobox<string> combobox; public comboboxpanel() { super(); combobox = new jcombobox<string>() { @override public dimension getpreferredsize() { dimension d = super.getpreferredsize(); return new dimension(80, d.height); } }; setopaque(true); combobox.setenabled(true); combobox.seteditable(false); add(combobox); } } class comboboxcellrenderer extends comboboxpanel implements tablecellrenderer { public comboboxcellrenderer() { super(); setname("table.cellrenderer"); } @override public component gettablecellrenderercomponent(jtable table, object value, boolean isselected, boolean hasfocus, int row, int column) { setbackground(isselected?table.getselectionbackground() :table.getbackground()); if(value!=null) { string[] clusterslist = (string[]) value; combobox.removeallitems(); for(string cluster:clusterslist){ combobox.additem(cluster); } system.out.print("items count = "+combobox.getitemcount()); system.out.print(" items: {"); int count = combobox.getitemcount(); for(int = 0; i<count; i++){ system.out.print(combobox.getitemat(i)+" "); } system.out.print("}"); system.out.println(""); } if(value!=null) { combobox.setselectedindex(0); } return this; } } public void draw(){ } public static void main(string[] args) { int ntables = 4; int nrows = 2; int ncols = 2; string[] tableinfo = new string[ntables]; string[][][][] clusters = new string[ntables][nrows][ncols][]; string[][][][] clustersintersections = new string[ntables][nrows][ncols][]; for(int t=0; t<ntables; t++){ tableinfo[t] = new string(" info"); for(int row=0; row<nrows; row++){ for(int col=0; col<ncols; col++){ clusters[t][row][col] = new string[]{" "+new integer(t).tostring(), new integer(row).tostring(), new integer(col).tostring()}; clustersintersections[t][row][col] = new string[]{new integer(t).tostring(), new integer(row).tostring(), new integer(col).tostring()}; } } } //create , set window. jframe frame = new jframe("mygui"); frame.setdefaultcloseoperation(jframe.exit_on_close); //create , set content pane. mygui gui = new mygui(ntables, nrows, ncols, tableinfo, clusters, clustersintersections); gui.setopaque(true); //content panes must opaque jscrollpane scrollpane = new jscrollpane(gui); frame.setcontentpane(scrollpane); //display window. frame.pack(); frame.setvisible(true); } }
be default cells not editable.
you need override iscelleditable(...) method of custom model return true make cell editable.
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