lets not use literals in conditions if there is a better way

org.eclipse.titan.designer/src/org/eclipse/titan/designer/core/TITANInstallationValidator.java

@@ -12,6 +12,7 @@ import java.io.File;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.window.Window;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.titan.designer.preferences.PreferenceConstants;
@@ -37,7 +38,7 @@ public final class TITANInstallationValidator {
 		protected void buttonPressed(final int buttonId) {
 			super.buttonPressed(buttonId);
 
-			if (buttonId == 1) {
+			if (buttonId == Window.CANCEL) {
 				PreferencesUtil.createPreferenceDialogOn(null,
 						"org.eclipse.titan.designer.preferences.pages.TITANPreferencePage", null, null).open();
 			}

org.eclipse.titan.designer/src/org/eclipse/titan/designer/license/LicenseValidator.java

@@ -13,6 +13,7 @@ import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.IPreferencesService;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.window.Window;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.titan.common.logging.ErrorReporter;
@@ -51,7 +52,7 @@ public final class LicenseValidator {
 		protected void buttonPressed(final int buttonId) {
 			super.buttonPressed(buttonId);
 
-			if (buttonId == 1) {
+			if (buttonId == Window.CANCEL) {
 				PreferencesUtil.createPreferenceDialogOn(null,
 						"org.eclipse.titan.designer.preferences.pages.TITANPreferencePage", null, null).open();
 			}

org.eclipse.titanium/src/org/eclipse/titanium/error/ErrorMessage.java

@@ -9,6 +9,7 @@ package org.eclipse.titanium.error;
 
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.window.Window;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.dialogs.PreferencesUtil;
 
@@ -48,11 +49,12 @@ public final class ErrorMessage {
 			public void run() {
 				final MessageDialog err = new MessageDialog(null, windowTitle, null, message, dialogType,
 						new String[] { IDialogConstants.OK_LABEL, buttonTitle }, 0) {
+
 					@Override
 					protected void buttonPressed(final int buttonId) {
 						super.buttonPressed(buttonId);
 
-						if (buttonId == 1) {
+						if (buttonId == Window.CANCEL) {
 							PreferencesUtil.createPreferenceDialogOn(null, pageName, null,
 									null).open();
 						}