src/jalviewfx/customcomponent/AlertDialog.java

   1 package jalviewfx.customcomponent;
   2
   3 import javafx.event.Event;
   4 import javafx.event.EventHandler;
   5 import javafx.geometry.Pos;
   6 import javafx.scene.Scene;
   7 import javafx.scene.control.Button;
   8 import javafx.scene.control.Label;
   9 import javafx.scene.image.Image;
  10 import javafx.scene.image.ImageView;
  11 import javafx.scene.layout.BorderPane;
  12 import javafx.scene.layout.HBox;
  13 import javafx.scene.paint.Color;
  14 import javafx.scene.text.Text;
  15 import javafx.stage.Modality;
  16 import javafx.stage.Stage;
  17 import javafx.stage.StageStyle;
  18
  19 public class AlertDialog extends Stage{
  20          private final int WIDTH_DEFAULT = 300;
  21
  22             public static final int ICON_INFO = 0;
  23             public static final int ICON_ERROR = 1;
  24
  25             @SuppressWarnings({ "unchecked", "rawtypes" })
  26                 public AlertDialog(Stage owner, String msg, int type) {
  27                 setResizable(false);
  28                 initModality(Modality.APPLICATION_MODAL);
  29                 initStyle(StageStyle.TRANSPARENT);
  30
  31                 Label label = new Label(msg);
  32                 label.setWrapText(true);
  33                 label.setGraphicTextGap(20);
  34                 label.setGraphic(new ImageView(getImage(type)));
  35
  36                 Button button = new Button("OK");
  37                 button.setOnAction(new EventHandler(){
  38                     @Override
  39                     public void handle(Event arg0) {
  40                         AlertDialog.this.close();
  41                     }
  42                 });
  43
  44                 BorderPane borderPane = new BorderPane();
  45                 borderPane.getStylesheets().add(getClass().getResource("alert.css").toExternalForm());
  46                 borderPane.setTop(label);
  47
  48                 HBox hbox2 = new HBox();
  49                 hbox2.setAlignment(Pos.CENTER);
  50                 hbox2.getChildren().add(button);
  51                 borderPane.setBottom(hbox2);
  52
  53                 // calculate width of string
  54                 final Text text = new Text(msg);
  55                 text.snapshot(null, null);
  56                 // + 20 because there is padding 10 left and right
  57                 int width = (int) text.getLayoutBounds().getWidth() + 40;
  58
  59                 if (width < WIDTH_DEFAULT)
  60                     width = WIDTH_DEFAULT;
  61
  62                 int height = 100;
  63
  64                 final Scene scene = new Scene(borderPane, width, height);
  65                 scene.setFill(Color.TRANSPARENT);
  66                 setScene(scene);
  67
  68                 // make sure this stage is centered on top of its owner
  69                 setX(owner.getX() + (owner.getWidth() / 2 - width / 2));
  70                 setY(owner.getY() + (owner.getHeight() / 2 - height / 2));
  71             }
  72
  73             private Image getImage(int type) {
  74                 if (type == ICON_ERROR)
  75                     return new Image(getClass().getResourceAsStream("/images/error.png"));
  76                 else
  77                     return new Image(getClass().getResourceAsStream("/images/info.png"));
  78             }
  79 }