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Add drag'n'drop to the designer for importing files (winder#2586)
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128 changes: 128 additions & 0 deletions
128
...atform-plugin-designer/src/main/java/com/willwinder/ugs/nbp/designer/gui/DropHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| Copyright 2024 Will Winder | ||
| This file is part of Universal Gcode Sender (UGS). | ||
| UGS is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU General Public License as published by | ||
| the Free Software Foundation, either version 3 of the License, or | ||
| (at your option) any later version. | ||
| UGS is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU General Public License for more details. | ||
| You should have received a copy of the GNU General Public License | ||
| along with UGS. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package com.willwinder.ugs.nbp.designer.gui; | ||
|
|
||
| import com.willwinder.ugs.nbp.designer.actions.ToolImportAction; | ||
| import static com.willwinder.ugs.nbp.designer.actions.ToolImportAction.FILE_NAME_EXTENSION_FILTERS; | ||
| import com.willwinder.ugs.nbp.designer.logic.ControllerFactory; | ||
| import com.willwinder.ugs.nbp.lib.lookup.CentralLookup; | ||
| import com.willwinder.universalgcodesender.model.BackendAPI; | ||
| import com.willwinder.universalgcodesender.utils.ThreadHelper; | ||
| import org.apache.commons.lang3.StringUtils; | ||
|
|
||
| import java.awt.datatransfer.DataFlavor; | ||
| import java.awt.datatransfer.Transferable; | ||
| import java.awt.datatransfer.UnsupportedFlavorException; | ||
| import java.awt.dnd.DnDConstants; | ||
| import java.awt.dnd.DropTargetDragEvent; | ||
| import java.awt.dnd.DropTargetDropEvent; | ||
| import java.awt.dnd.DropTargetEvent; | ||
| import java.awt.dnd.DropTargetListener; | ||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.util.Arrays; | ||
| import java.util.Optional; | ||
|
|
||
| /** | ||
| * Listens for drag'n'drop of known file types and imports it via the {@link ToolImportAction}. | ||
| * | ||
| * @author Joacim Breiler | ||
| */ | ||
| public class DropHandler implements DropTargetListener { | ||
| private static Optional<String> getFilename(DataFlavor stringFlavor, Transferable transferable) { | ||
| try { | ||
| String filename = (String) transferable.getTransferData(stringFlavor); | ||
| if (hasCorrectExtension(filename)) { | ||
| return Optional.of(filename); | ||
| } | ||
| } catch (UnsupportedFlavorException | IOException e) { | ||
| // Never mind... | ||
| } | ||
|
|
||
| return Optional.empty(); | ||
| } | ||
|
|
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| private static boolean hasCorrectExtension(String filename) { | ||
| return Arrays.stream(FILE_NAME_EXTENSION_FILTERS) | ||
| .flatMap(s -> Arrays.stream(s.getExtensions())) | ||
| .anyMatch(extension -> StringUtils.endsWithIgnoreCase(filename, extension)); | ||
| } | ||
|
|
||
| private Optional<String> getFilename(DropTargetDragEvent dtde) { | ||
| DataFlavor stringFlavor = DataFlavor.stringFlavor; | ||
| if (!dtde.isDataFlavorSupported(stringFlavor)) { | ||
| return Optional.empty(); | ||
| } | ||
|
|
||
| Transferable transferable = dtde.getTransferable(); | ||
| return getFilename(stringFlavor, transferable); | ||
| } | ||
|
|
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| private Optional<String> getFilename(DropTargetDropEvent dtde) { | ||
| DataFlavor stringFlavor = DataFlavor.stringFlavor; | ||
| if (!dtde.isDataFlavorSupported(stringFlavor)) { | ||
| return Optional.empty(); | ||
| } | ||
|
|
||
| dtde.acceptDrop(DnDConstants.ACTION_COPY); | ||
| Transferable transferable = dtde.getTransferable(); | ||
| return getFilename(stringFlavor, transferable); | ||
| } | ||
|
|
||
| @Override | ||
| public void dragEnter(DropTargetDragEvent dtde) { | ||
| Optional<String> filename = getFilename(dtde); | ||
| if (filename.isEmpty()) { | ||
| dtde.rejectDrag(); | ||
| return; | ||
| } | ||
|
|
||
| dtde.acceptDrag(DnDConstants.ACTION_COPY); | ||
| } | ||
|
|
||
| @Override | ||
| public void dragOver(DropTargetDragEvent dtde) { | ||
| dragEnter(dtde); | ||
| } | ||
|
|
||
| @Override | ||
| public void dropActionChanged(DropTargetDragEvent dtde) { | ||
| // Not used | ||
| } | ||
|
|
||
| @Override | ||
| public void dragExit(DropTargetEvent dte) { | ||
| // Not used | ||
| } | ||
|
|
||
| @Override | ||
| public void drop(DropTargetDropEvent dtde) { | ||
| Optional<String> filename = getFilename(dtde); | ||
| if (filename.isEmpty()) { | ||
| dtde.dropComplete(false); | ||
| return; | ||
| } | ||
|
|
||
| ThreadHelper.invokeLater(() -> { | ||
| File file = filename.map(File::new).get(); | ||
| ToolImportAction.readDesign(ControllerFactory.getController(), CentralLookup.getDefault().lookup(BackendAPI.class), file); | ||
| dtde.dropComplete(true); | ||
| }); | ||
| } | ||
| } |