gui: set bigger window size at start

jadx-gui/src/main/java/jadx/gui/JadxGUI.java

@@ -4,6 +4,7 @@ import jadx.cli.JadxCLIArgs;
 
 import javax.swing.SwingUtilities;
 import javax.swing.UIManager;
+import javax.swing.WindowConstants;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -19,7 +20,11 @@ public class JadxGUI {
 				public void run() {
 					JadxWrapper wrapper = new JadxWrapper(jadxArgs);
 					MainWindow mainWindow = new MainWindow(wrapper);
+					mainWindow.pack();
+					mainWindow.setLocationAndPosition();
 					mainWindow.setVisible(true);
+					mainWindow.setLocationRelativeTo(null);
+					mainWindow.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 
 					if (!jadxArgs.getInput().isEmpty()) {
 						mainWindow.openFile(jadxArgs.getInput().get(0));

jadx-gui/src/main/java/jadx/gui/MainWindow.java

@@ -33,6 +33,8 @@ import javax.swing.tree.TreeSelectionModel;
 import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Toolkit;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.InputEvent;
@@ -51,6 +53,9 @@ public class MainWindow extends JFrame {
 	private static final String DEFAULT_TITLE = "jadx-gui";
 	private static final Color BACKGROUND = new Color(0xf7f7f7);
 
+	private static final double BORDER_RATIO = 0.15;
+	private static final double WINDOW_RATIO = 1 - BORDER_RATIO * 2;
+
 	private static final ImageIcon ICON_OPEN = Utils.openIcon("folder");
 	private static final ImageIcon ICON_SAVE_ALL = Utils.openIcon("disk_multiple");
 	private static final ImageIcon ICON_CLOSE = Utils.openIcon("cross");
@@ -228,7 +233,7 @@ public class MainWindow extends JFrame {
 	private void initUI() {
 		mainPanel = new JPanel(new BorderLayout());
 		JSplitPane splitPane = new JSplitPane();
-		splitPane.setDividerLocation(200);
+		splitPane.setResizeWeight(0.2);
 		mainPanel.add(splitPane);
 
 		DefaultMutableTreeNode treeRoot = new DefaultMutableTreeNode("Please open file");
@@ -281,9 +286,14 @@ public class MainWindow extends JFrame {
 
 		setContentPane(mainPanel);
 		setTitle(DEFAULT_TITLE);
-		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
-		pack();
-		setLocationRelativeTo(null);
+	}
+
+	public void setLocationAndPosition() {
+		Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
+		double w = dimension.getWidth();
+		double h = dimension.getHeight();
+		setLocation((int) (w * BORDER_RATIO), (int) (h * BORDER_RATIO));
+		setSize((int) (w * WINDOW_RATIO), (int) (h * WINDOW_RATIO));
 	}
 
 	private class OpenListener implements ActionListener {