GUI stuff.

Almost finished with imports from version one.

1 files changed, 127 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleDialogs.java b/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleDialogs.java
new file mode 100644
index 0000000..7731529
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/gui/SimpleDialogs.java
@@ -0,0 +1,127 @@
+package bjc.utils.gui;
+
+import java.awt.Component;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+import javax.swing.JOptionPane;
+
+/**
+ * Utility class for getting simple input from the user.
+ * @author ben
+ *
+ */
+public class SimpleDialogs {
+	/**
+	 * Get a bounded integer from the user.
+	 * @param parent The parent component for the dialogs.
+	 * @param title The title for the dialogs.
+	 * @param prompt The prompt to tell the user what to enter.
+	 * @param lower The lower integer bound to accept.
+	 * @param upper The upper integer bound to accept.
+	 * @return A int within the specified bounds.
+	 */
+	public static int getBoundedInt(Component parent, String title,
+			String prompt, int lower, int upper) {
+		return getValue(parent, title, prompt, s -> {
+			try {
+				int n = Integer.parseInt(s);
+				return (n < upper) && (n > lower);
+			} catch (NumberFormatException nfe) {
+				return false;
+			}
+		} , Integer::parseInt);
+	}
+
+	/**
+	 * Get a integer from the user
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for dialogs.
+	 * @param prompt The prompt to tell the user what to enter.
+	 * @return A int.
+	 */
+	public static int getInt(Component parent, String title,
+			String prompt) {
+		return getValue(parent, title, prompt, s -> {
+			try {
+				Integer.parseInt(s);
+				return true;
+			} catch (NumberFormatException nfe) {
+				return false;
+			}
+		} , Integer::parseInt);
+	}
+
+	/**
+	 * Get a string from the user
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for the dialogs.
+	 * @param prompt The prompt to tell the user what to enter.
+	 * @return A string.
+	 */
+	public static String getString(Component parent, String title, String prompt) {
+		return JOptionPane.showInputDialog(parent, prompt, title,
+				JOptionPane.QUESTION_MESSAGE);
+	}
+
+	/**
+	 * Get a value parsable from a string from the user.
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for dialogs.
+	 * @param prompt The prompt to tell the user what to enter.
+	 * @param p A predicate to determine if a input is valid.
+	 * @param f The function to transform the string into a value.
+	 * @return The value parsed from a string.
+	 */
+	public static <E> E getValue(Component parent, String title,
+			String prompt, Predicate<String> p, Function<String, E> f) {
+		String inp = getString(parent, title, prompt);
+
+		while (!p.test(inp)) {
+			showError(parent, "I/O Error", "Please enter a valid value");
+
+			inp = getString(parent, title, prompt);
+		}
+
+		return f.apply(inp);
+	}
+
+	/**
+	 * Get a whole number from the user.
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for dialogs.
+	 * @param prompt The prompt to tell the user what to enter.
+	 * @return A whole number.
+	 */
+	public static int getWhole(Component parent, String title,
+			String prompt) {
+		return getBoundedInt(parent, title, prompt, 0, Integer.MAX_VALUE);
+	}
+
+	/**
+	 * Ask the user a Yes/No question.
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for dialogs.
+	 * @param question The question to ask the user.
+	 * @return True if the user said yes, false otherwise.
+	 */
+	public static boolean getYesNo(Component parent, String title,
+			String question) {
+		int res = JOptionPane.showConfirmDialog(parent, question, title,
+				JOptionPane.YES_NO_OPTION);
+
+		return (res == JOptionPane.YES_OPTION ? true : false);
+	}
+	
+	/**
+	 * Show a error message to the user
+	 * @param parent The parent component for dialogs.
+	 * @param title The title for dialogs.
+	 * @param err The error to show the user.
+	 */
+	public static void showError(Component parent, String title,
+			String err) {
+		JOptionPane.showMessageDialog(parent, err, title,
+				JOptionPane.ERROR_MESSAGE);
+	}
+}