I'm trying Java drag and drop action. Action works by mobilizing the path to the image that I wanted to portray subsequently label, but are not plotted, can someone please help?
class MyDragDropListener implements DropTargetListener {
public void drop(DropTargetDropEvent event) {
// Accept copy drops
event.acceptDrop(DnDConstants.ACTION_COPY);
// Get the transfer which can provide the dropped item data
Transferable transferable = event.getTransferable();
// Get the data formats of the dropped item
DataFlavor[] flavors = transferable.getTransferDataFlavors();
// Loop through the flavors
for (DataFlavor flavor : flavors) {
try {
// If the drop items are files
if (flavor.isFlavorJavaFileListType()) {
// List files = (List) transferable.getTransferData(flavor);
Object f = transferable.getTransferData(flavor);
// Loop them through
// for (File file : files) {
// Print out the file path
// System.out.println("File path is '" + f.getPath() + "'.");
String cesta = f.toString();
String typ = "";
String cesta2 = "";
for (int i = 1; i < cesta.length() - 1; i++) {
if (cesta.charAt(i) == '\\') {
cesta2 = cesta2 + '/';
} else {
cesta2 = cesta2 + cesta.charAt(i);
}
}
for (int i = cesta2.length() - 1; i > 0; i--) {
if (cesta2.charAt(i) == '.') {
break;
}
typ = typ + cesta2.charAt(i);
}
typ = new StringBuilder(typ).reverse().toString().toLowerCase();
MojeOkno mo = new MojeOkno();
// Inform that the drop is complete
mo.VlozObrazekDoLabelu(cesta2);
System.out.println("METODA PROBEHLA");
}
} catch (Exception e) {
// Print out the error stack
e.printStackTrace();
}
}
event.dropComplete(true);
}
public void dragEnter(DropTargetDragEvent event) {
}
public void dragExit(DropTargetEvent event) {
}
public void dragOver(DropTargetDragEvent event) {
}
public void dropActionChanged(DropTargetDragEvent event) {
}
}
public void VlozObrazekDoLabelu(String Mojecesta) {
System.out.println("Cesta k obrazku: " + Mojecesta);
try {
img = ImageIO.read(new File(Mojecesta));
Graphics2D g = (Graphics2D) PanelProObrazek_jPanel1.getGraphics();
g.drawImage(img, 3, 3, PanelProObrazek_jPanel1.getWidth() - 6, PanelProObrazek_jPanel1.getHeight() - 6, this);
System.out.println("Dostal jsem se do try");
} catch (Exception e) {
System.out.println("CHYBA");
}
}
Greetings from Czech Republic.
The problem is in MyDragDropListener.drop(DropTargetDropEvent event)
// CESTA2 == PATH TO IMG
MojeOkno mo = new MojeOkno();
mo.InserImgToPanel(cesta2);
You created a new MojeOkno, that's why it wont work. Make several changes:
// 1. method Callmeafterstart
MyDragDropListener myDragDropListener = new MyDragDropListener(this);
// 2. class MyDragDropListener
private MojeOkno mojeOkno;
public MyDragDropListener(MojeOkno mojeOkno) {
this.mojeOkno = mojeOkno;
}
// 3. method drop
// CESTA2 == PATH TO IMG
mojeOkno.InserImgToPanel(cesta2);
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