java - How to determine the correct position of an Image inside of a CTabItem -


i add ctabitems images ctabfolder:

ctabfolder tabfolder = new ctabfolder(somesection, swt.border); imagedescriptor deleteimagedesc = sharedimages.getimagedescriptor(isharedimages.img_etool_delete); image deleteimage = deleteimagedesc.createimage(); ctabitem tabitem = new ctabitem(tabfolder, swt.none); tabitem.setimage(deleteimage); // add more tabs...

tabitems

then want create tooltip appears if user moves mouse on deleteimage.

tooltip deletetooltip = new tooltip(getshell(), swt.baloon); deletetooltip.setmessage("delete"); tabfolder.addmousetracklistener(new mousetrackadapter() {     @override     public void mousehover(mouseevent e)     {         tooltip.setlocation(tabfolder.todisplay(e.x, e.y));         tooltip.setvisible(doesanyoftabimagescontainpoint(mouseposition));     } });

to implement method doesanyoftabimagescontainpoint need determine position of every deleteimage. since ctabitem isn't control cannot use method todisplay. try solve manually determining position of deleteimage relative tabfolder. because mouse position held mouseevent relative tabfolder.

private boolean doesanyoftabimagescontainpoint(point p) {     (ctabitem tabitem : tabfolder.getitems())     {         image = tabitem.getimage();         rectangle tabitembounds = tabitem.getbounds();         rectangle imagebounds = i.getbounds();         imagebounds.x += tabitembounds.x;         imagebounds.y += tabitembounds.y;         if (imagebounds.contains(p))             return true;     }     return false; }

the requirement working rectangle returned i.getbounds() has correct location relative tabitem. returns (0, 0, 16, 16) cannot right.

a dirty way fix add constants:

imagebounds.x += bstabbounds.x + 4; imagebounds.y += bstabbounds.y + 3;

but wondering if there's better way. i'm trying investigate how ctabfolder positions images of tabs without success now. appreciated. in advance.

edit: testing purposes here's extracted image isharedimages modified see border: delete.png

give code below shot. it's based on answer here.

public static void main(string[] args) {     display display = display.getdefault();     final shell shell = new shell(display);     shell.setlayout(new filllayout());      final tabfolder folder = new tabfolder(shell, swt.none);      tabitem item = new tabitem(folder, swt.none);     item.setimage(display.getsystemimage(swt.icon_error));     item.settext("text");      folder.addlistener(swt.mousemove, event -> {         tabfolder curfolder = (tabfolder) event.widget;         point eventlocation = new point(event.x, event.y);         tabitem theitem = curfolder.getitem(eventlocation);          if (theitem == null)             return;          image image = theitem.getimage();          if (eventlocation.x >= curfolder.getclientarea().x + theitem.getbounds().x + image.getbounds().x                 && eventlocation.x <= curfolder.getclientarea().x + theitem.getbounds().x + image.getbounds().x + image.getbounds().width                 && eventlocation.y >= theitem.getbounds().y + image.getbounds().y                 && eventlocation.y <= theitem.getbounds().y + image.getbounds().y + image.getbounds().height)         {             system.out.println("show tooltip");         }     });       shell.pack();     shell.open();     while (!shell.isdisposed())     {         if (!display.readanddispatch())             display.sleep();     } }

i've tested on windows 7 , seems working fine.


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