src/be/nikiroo/fanfix/reader/tui/TSimpleScrollableWindow.java

   1 package be.nikiroo.fanfix.reader.tui;
   2
   3 import jexer.TApplication;
   4 import jexer.THScroller;
   5 import jexer.TPanel;
   6 import jexer.TScrollableWindow;
   7 import jexer.TVScroller;
   8 import jexer.TWidget;
   9 import jexer.event.TResizeEvent;
  10
  11 public class TSimpleScrollableWindow extends TScrollableWindow {
  12         protected TPanel mainPane;
  13         private int prevHorizontal = -1;
  14         private int prevVertical = -1;
  15
  16         public TSimpleScrollableWindow(TApplication application, String title,
  17                         int width, int height) {
  18                 this(application, title, width, height, 0, 0, 0);
  19         }
  20
  21         public TSimpleScrollableWindow(TApplication application, String title,
  22                         int width, int height, int flags) {
  23                 this(application, title, width, height, flags, 0, 0);
  24         }
  25
  26         // 0 = none (so, no scrollbar)
  27         public TSimpleScrollableWindow(TApplication application, String title,
  28                         int width, int height, int flags, int realWidth, int realHeight) {
  29                 super(application, title, width, height, flags);
  30
  31                 mainPane = new TPanel(this, 0, 0, 1, 1) {
  32                         @Override
  33                         public void draw() {
  34                                 for (TWidget children : mainPane.getChildren()) {
  35                                         int y = children.getY() + children.getHeight();
  36                                         int x = children.getX() + children.getWidth();
  37                                         boolean visible = (y > getVerticalValue())
  38                                                         && (x > getHorizontalValue());
  39                                         children.setVisible(visible);
  40                                 }
  41                                 super.draw();
  42                         }
  43                 };
  44
  45                 mainPane.setWidth(getWidth());
  46                 mainPane.setHeight(getHeight());
  47
  48                 setRealWidth(realWidth);
  49                 setRealHeight(realHeight);
  50                 placeScrollbars();
  51         }
  52
  53         /**
  54          * The main pane on which you can add other widgets for this scrollable
  55          * window.
  56          *
  57          * @return the main pane
  58          */
  59         public TPanel getMainPane() {
  60                 return mainPane;
  61         }
  62
  63         public void setRealWidth(int realWidth) {
  64                 if (realWidth <= 0) {
  65                         if (hScroller != null) {
  66                                 hScroller.remove();
  67                         }
  68                 } else {
  69                         if (hScroller == null) {
  70                                 // size/position will be fixed by placeScrollbars()
  71                                 hScroller = new THScroller(this, 0, 0, 10);
  72                         }
  73                         hScroller.setRightValue(realWidth);
  74                 }
  75
  76                 reflowData();
  77         }
  78
  79         public void setRealHeight(int realHeight) {
  80                 if (realHeight <= 0) {
  81                         if (vScroller != null) {
  82                                 vScroller.remove();
  83                         }
  84                 } else {
  85                         if (vScroller == null) {
  86                                 // size/position will be fixed by placeScrollbars()
  87                                 vScroller = new TVScroller(this, 0, 0, 10);
  88                         }
  89                         vScroller.setBottomValue(realHeight);
  90                 }
  91
  92                 reflowData();
  93         }
  94
  95         @Override
  96         public void onResize(TResizeEvent event) {
  97                 super.onResize(event);
  98                 mainPane.setWidth(getWidth());
  99                 mainPane.setHeight(getHeight());
 100                 mainPane.onResize(event);
 101         }
 102
 103         @Override
 104         public void reflowData() {
 105                 super.reflowData();
 106                 reflowData(getHorizontalValue(), getVerticalValue());
 107         }
 108
 109         protected void reflowData(int totalX, int totalY) {
 110                 super.reflowData();
 111                 mainPane.setX(-totalX);
 112                 mainPane.setY(-totalY);
 113         }
 114
 115         @Override
 116         public void draw() {
 117                 if (prevHorizontal != getHorizontalValue()
 118                                 || prevVertical != getVerticalValue()) {
 119                         prevHorizontal = getHorizontalValue();
 120                         prevVertical = getVerticalValue();
 121                         reflowData();
 122                 }
 123
 124                 super.draw();
 125         }
 126 }