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.TMouseEvent;
  10 import jexer.event.TResizeEvent;
  11
  12 public class TSimpleScrollableWindow extends TScrollableWindow {
  13         protected TPanel mainPane;
  14         private int prevHorizontal = -1;
  15         private int prevVertical = -1;
  16
  17         public TSimpleScrollableWindow(TApplication application, String title,
  18                         int width, int height) {
  19                 this(application, title, width, height, 0, 0, 0);
  20         }
  21
  22         public TSimpleScrollableWindow(TApplication application, String title,
  23                         int width, int height, int flags) {
  24                 this(application, title, width, height, flags, 0, 0);
  25         }
  26
  27         // 0 = none (so, no scrollbar)
  28         public TSimpleScrollableWindow(TApplication application, String title,
  29                         int width, int height, int flags, int realWidth, int realHeight) {
  30                 super(application, title, width, height, flags);
  31
  32                 mainPane = new TPanel(this, 0, 0, 1, 1) {
  33                         @Override
  34                         public void draw() {
  35                                 for (TWidget children : mainPane.getChildren()) {
  36                                         int y = children.getY() + children.getHeight();
  37                                         int x = children.getX() + children.getWidth();
  38                                         boolean visible = (y > getVerticalValue())
  39                                                         && (x > getHorizontalValue());
  40                                         children.setVisible(visible);
  41                                 }
  42                                 super.draw();
  43                         }
  44                 };
  45
  46                 mainPane.setWidth(getWidth());
  47                 mainPane.setHeight(getHeight());
  48
  49                 setRealWidth(realWidth);
  50                 setRealHeight(realHeight);
  51                 placeScrollbars();
  52         }
  53
  54         /**
  55          * The main pane on which you can add other widgets for this scrollable
  56          * window.
  57          *
  58          * @return the main pane
  59          */
  60         public TPanel getMainPane() {
  61                 return mainPane;
  62         }
  63
  64         public void setRealWidth(int realWidth) {
  65                 if (realWidth <= 0) {
  66                         if (hScroller != null) {
  67                                 hScroller.remove();
  68                         }
  69                 } else {
  70                         if (hScroller == null) {
  71                                 // size/position will be fixed by placeScrollbars()
  72                                 hScroller = new THScroller(this, 0, 0, 10);
  73                         }
  74                         setRightValue(realWidth);
  75                 }
  76
  77                 reflowData();
  78         }
  79
  80         public void setRealHeight(int realHeight) {
  81                 if (realHeight <= 0) {
  82                         if (vScroller != null) {
  83                                 vScroller.remove();
  84                         }
  85                 } else {
  86                         if (vScroller == null) {
  87                                 // size/position will be fixed by placeScrollbars()
  88                                 vScroller = new TVScroller(this, 0, 0, 10);
  89                         }
  90                         setBottomValue(realHeight);
  91                 }
  92
  93                 reflowData();
  94         }
  95
  96         @Override
  97         public void onResize(TResizeEvent event) {
  98                 super.onResize(event);
  99                 mainPane.setWidth(getWidth());
 100                 mainPane.setHeight(getHeight());
 101                 mainPane.onResize(event);
 102         }
 103
 104         @Override
 105         public void reflowData() {
 106                 super.reflowData();
 107                 reflowData(getHorizontalValue(), getVerticalValue());
 108         }
 109
 110         protected void reflowData(int totalX, int totalY) {
 111                 super.reflowData();
 112                 mainPane.setX(-totalX);
 113                 mainPane.setY(-totalY);
 114         }
 115
 116         @Override
 117         public void onMouseUp(TMouseEvent mouse) {
 118                 super.onMouseUp(mouse);
 119
 120                 // TODO: why? this should already be done by the scrollers
 121                 // it could also mean we do it twice if, somehow, it sometime works...
 122                 int mrx = mouse.getX();
 123                 int mry = mouse.getY();
 124
 125                 int mx = mouse.getAbsoluteX();
 126                 int my = mouse.getAbsoluteY();
 127
 128                 if (vScroller != null) {
 129                         mouse.setX(mx - vScroller.getAbsoluteX());
 130                         mouse.setY(my - vScroller.getAbsoluteY());
 131                         vScroller.onMouseUp(mouse);
 132                 }
 133                 if (hScroller != null) {
 134                         mouse.setX(mx - hScroller.getAbsoluteX());
 135                         mouse.setY(my - hScroller.getAbsoluteY());
 136                         hScroller.onMouseUp(mouse);
 137                 }
 138
 139                 mouse.setX(mrx);
 140                 mouse.setY(mry);
 141                 //
 142
 143                 if (prevHorizontal != getHorizontalValue()
 144                                 || prevVertical != getVerticalValue()) {
 145                         prevHorizontal = getHorizontalValue();
 146                         prevVertical = getVerticalValue();
 147                         reflowData();
 148                 }
 149         }
 150 }