Auto size ListChooser dialogs to fit items if possible

forge-gui/src/main/java/forge/gui/ListChooser.java

@@ -19,6 +19,7 @@
 package forge.gui;
 
 import java.awt.Component;
+import java.awt.Dimension;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 import java.awt.event.MouseEvent;
@@ -102,7 +103,14 @@ public class ListChooser<T> {
             this.lstChoices.setCellRenderer(new TransformedCellRenderer(display));
         }
 
-        this.optionPane = new FOptionPane(null, title, null, new FScrollPane(this.lstChoices), options, minChoices < 0 ? 0 : -1);
+        FScrollPane listScroller = new FScrollPane(this.lstChoices);
+        int minWidth = this.lstChoices.getAutoSizeWidth();
+        if (this.lstChoices.getModel().getSize() > this.lstChoices.getVisibleRowCount()) {
+            minWidth += listScroller.getVerticalScrollBar().getPreferredSize().width;
+        }
+        listScroller.setMinimumSize(new Dimension(minWidth, listScroller.getMinimumSize().height));
+
+        this.optionPane = new FOptionPane(null, title, null, listScroller, options, minChoices < 0 ? 0 : -1);
         this.optionPane.setButtonEnabled(0, minChoices <= 0);
 
         if (minChoices != -1) {

forge-gui/src/main/java/forge/gui/toolbox/FList.java

@@ -1,6 +1,7 @@
 package forge.gui.toolbox;
 
 import java.awt.Component;
+import java.awt.FontMetrics;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 
@@ -11,6 +12,7 @@ import javax.swing.ListCellRenderer;
 import javax.swing.ListModel;
 import javax.swing.border.EmptyBorder;
 
+import forge.Singletons;
 import forge.gui.toolbox.FSkin.SkinnedList;
 
 /** 
@@ -19,6 +21,8 @@ import forge.gui.toolbox.FSkin.SkinnedList;
  */
 @SuppressWarnings("serial")
 public class FList<E> extends SkinnedList<E> {
+    private static final EmptyBorder itemBorder = new EmptyBorder(4, 3, 4, 3);
+
     public FList() {
         super();
         initialize();
@@ -70,6 +74,30 @@ public class FList<E> extends SkinnedList<E> {
         this.setSelectionBackground(FSkin.getColor(hasFocus() ? FSkin.Colors.CLR_ACTIVE : FSkin.Colors.CLR_INACTIVE));
     }
 
+    public int getAutoSizeWidth() {
+        FontMetrics metrics = this.getSkin().getFont().getFontMetrics();
+        int width = 0;
+        for (int i = 0; i < this.getModel().getSize(); i++) {
+            int itemWidth = metrics.stringWidth(this.getModel().getElementAt(i).toString());
+            if (itemWidth > width) {
+                width = itemWidth;
+            }
+        }
+        width += itemBorder.getBorderInsets().left + itemBorder.getBorderInsets().right; //account for item border insets
+
+        int minWidth = 150;
+        if (width < minWidth) {
+            width = minWidth;
+        }
+        else {
+            int maxWidth = Singletons.getView().getFrame().getWidth() / 2;
+            if (width > maxWidth) {
+                width = maxWidth;
+            }
+        }
+        return width;
+    }
+
     private class ComplexCellRenderer<E1> implements ListCellRenderer<E1> {
         private DefaultListCellRenderer defaultRenderer = new DefaultListCellRenderer();
 
@@ -79,7 +107,7 @@ public class FList<E> extends SkinnedList<E> {
 
             JLabel lblItem = (JLabel) defaultRenderer.getListCellRendererComponent(
                     lst0, val0, i0, isSelected, cellHasFocus);
-            lblItem.setBorder(new EmptyBorder(4, 3, 4, 3));
+            lblItem.setBorder(itemBorder);
             return lblItem;
         }
     }

forge-gui/src/main/java/forge/gui/toolbox/FSkin.java

@@ -22,6 +22,7 @@ import java.awt.Component;
 import java.awt.Cursor;
 import java.awt.Dimension;
 import java.awt.Font;
+import java.awt.FontMetrics;
 import java.awt.Frame;
 import java.awt.GradientPaint;
 import java.awt.Graphics;
@@ -1260,6 +1261,10 @@ public enum FSkin {
             return g.getFontMetrics(this.font).stringWidth(text);
         }
 
+        public FontMetrics getFontMetrics() {
+            return Singletons.getView().getFrame().getGraphics().getFontMetrics(this.font);
+        }
+
         private void updateFont() {
             this.font = baseFont.deriveFont(this.style, this.size);
         }
@@ -1903,6 +1908,7 @@ public enum FSkin {
         protected void setBackground(T comp, SkinColor skinColor) { comp.setBackground(skinColor != null ? skinColor.color : null); this.background = skinColor; }
         protected void resetBackground() { this.background = null; }
 
+        public SkinFont getFont() { return this.font; }
         protected void setFont(T comp, SkinFont skinFont) { comp.setFont(skinFont != null ? skinFont.font : null); this.font = skinFont; }
         protected void resetFont() { this.font = null; }