Expose cancel state of FileDialog

bundles/org.eclipse.swt/Eclipse SWT PI/cocoa/org/eclipse/swt/internal/cocoa/OS.java

@@ -179,7 +179,7 @@ public static void beginSheetModalForWindow(NSObject id, NSWindow window, long h
 	 * Custom message that will be sent when setTheme is called for example from Platform UI code.
 	 */
 	public static final long sel_appAppearanceChanged = OS.sel_registerName("appAppearanceChanged");
-	
+
 	/**
 	 * Experimental API for dark theme.
 	 * <p>
@@ -194,7 +194,7 @@ public static void beginSheetModalForWindow(NSObject id, NSWindow window, long h
 	 * On GTK, behavior may be different as the boolean flag doesn't force dark
 	 * theme instead it specify that dark theme is preferred.
 	 * </p>
-	 * 
+	 *
 	 * @param isDarkTheme <code>true</code> for dark theme
 	 */
 	public static void setTheme(boolean isDarkTheme) {
@@ -2216,6 +2216,7 @@ public static Selector getSelector (long value) {
 public static final int NSEventTypeMagnify = 30;
 public static final int NSEventTypeRotate = 18;
 public static final int NSEventTypeSwipe = 31;
+public static final int NSFileHandlingPanelCancelButton = 0;
 public static final int NSFileHandlingPanelOKButton = 1;
 public static final int NSFlagsChanged = 12;
 public static final int NSFocusRingTypeNone = 1;

bundles/org.eclipse.swt/Eclipse SWT PI/win32/org/eclipse/swt/internal/win32/OS.java

@@ -452,6 +452,7 @@ public class OS extends C {
 	public static final int EP_EDITTEXT = 1;
 	public static final int ERROR_FILE_NOT_FOUND = 0x2;
 	public static final int ERROR_NO_MORE_ITEMS = 0x103;
+	public static final int ERROR_CANCELED = 0x4C7;
 	public static final int ESB_DISABLE_BOTH = 0x3;
 	public static final int ESB_ENABLE_BOTH = 0x0;
 	public static final int ES_AUTOHSCROLL = 0x80;

bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/FileDialog.java

@@ -58,6 +58,7 @@ public class FileDialog extends Dialog {
 	long methodImpl_overwriteExistingFileCheck = 0;
 	long method_performKeyEquivalent = 0;
 	long methodImpl_performKeyEquivalent = 0;
+	boolean canceled;
 	static final char EXTENSION_SEPARATOR = ';';
 	private String selectedExtension;
 	boolean overwrite = (OS.VERSION >= OS.VERSION(10, 15, 0)) ? true : false;
@@ -333,6 +334,7 @@ void handleResponse (long response) {
 			}
 		}
 	}
+	canceled = response == OS.NSFileHandlingPanelCancelButton;
 	releaseHandles();
 }
 
@@ -446,6 +448,14 @@ public String open () {
 	return fullPath;
 }
 
+/**
+ * {@return whether the dialog has been canceled when last opened or has not been opened at all}
+ * @since 3.125
+ */
+public boolean wasCanceled() {
+	return canceled;
+}
+
 long panel_shouldEnableURL (long id, long sel, long arg0, long arg1) {
 	if ((style & SWT.SAVE) != 0) {
 		/* All filenames are always disabled in the NSSavePanel, so return from here. */

bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/FileDialog.java

@@ -53,6 +53,7 @@ public class FileDialog extends Dialog {
 	boolean overwrite = false;
 	boolean uriMode;
 	long handle;
+	boolean canceled;
 	static final char SEPARATOR = File.separatorChar;
 	static final char EXTENSION_SEPARATOR = ';';
 	static final char FILE_EXTENSION_SEPARATOR = '.';
@@ -374,6 +375,7 @@ String openNativeChooserDialog () {
 		display.externalEventLoop = false;
 		display.sendPostExternalEventDispatchEvent ();
 	}
+	canceled = response == GTK.GTK_RESPONSE_CANCEL;
 
 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		OS.g_signal_remove_emission_hook (signalId, hookId);
@@ -385,6 +387,14 @@ String openNativeChooserDialog () {
 	return answer;
 }
 
+/**
+ * {@return whether the dialog has been canceled when last opened or has not been opened at all}
+ * @since 3.125
+ */
+public boolean wasCanceled() {
+	return canceled;
+}
+
 void presetChooserDialog () {
 	/* MULTI is only valid if the native dialog's action is Open */
 	if ((style & (SWT.SAVE | SWT.MULTI)) == SWT.MULTI) {

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/FileDialog.java

@@ -46,6 +46,7 @@ public class FileDialog extends Dialog {
 	String filterPath = "", fileName = "";
 	int filterIndex = 0;
 	boolean overwrite = false;
+	boolean canceled;
 	static final String DEFAULT_FILTER = "*.*";
 	static final String LONG_PATH_PREFIX = "\\\\?\\";
 
@@ -322,6 +323,7 @@ public String open () {
 	display.externalEventLoop = true;
 	display.sendPreExternalEventDispatchEvent();
 	hr = fileDialog.Show(parent.handle);
+	canceled = hr == OS.HRESULT_FROM_WIN32(OS.ERROR_CANCELED);
 	display.externalEventLoop = false;
 	display.sendPostExternalEventDispatchEvent();
 
@@ -389,6 +391,14 @@ public String open () {
 	return fullPath;
 }
 
+/**
+ * {@return whether the dialog has been canceled when last opened or has not been opened at all}
+ * @since 3.125
+ */
+public boolean wasCanceled() {
+	return canceled;
+}
+
 /**
  * Set the initial filename which the dialog will
  * select by default when opened to the argument,