canvas.gui: Checkable buttons, layout for ScrollArea and images for Lables.

Nasal/canvas/gui.nas

@@ -35,7 +35,7 @@ var WindowButton = {
     var window_focus = me._windowFocus();
     file ~= window_focus ? "_focused" : "_unfocused";
 
-    if( me._active )
+    if( me._down )
       file ~= "_pressed";
     else if( me._hover )
       file ~= "_prelight";
@@ -405,7 +405,7 @@ var Window = {
 
     var button_close = WindowButton.new(title_bar, "close")
                                    .move(x, y);
-    button_close.onClick = func me.del();
+    button_close.listen("clicked", func me.del());
 
     # title
     me._title = title_bar.createChild("text", "title")
@@ -452,32 +452,6 @@ var Dialog = {
   }
 };
 
-var createLayoutTest = func
-{
-  var dlg = canvas.Window.new([350,250], "dialog")
-                         .set("resize", 1);
-  dlg.getCanvas(1)
-     .set("background", style.getColor("bg_color"));
-  var root = dlg.getCanvas().createGroup();
-
-  var vbox = VBoxLayout.new();
-  dlg.setLayout(vbox);
-
-  var b = gui.widgets.Button.new(root, style, {}).setText("Stretch");
-  b.setMaximumSize([9999, 9999]);
-  vbox.addItem(b, 1);
-
-  var button_box = HBoxLayout.new();
-  vbox.addItem(button_box);
-
-  var b1 = gui.widgets.Button.new(root, style, {}).setText("Ok");
-  button_box.addItem(b1);
-  b1.setFocus();
-
-  var b2 = gui.widgets.Button.new(root, style, {}).setText("Abort");
-  button_box.addItem(b2);
-}
-
 # Canvas GUI demo
 #
 #  Shows an icon in the top-right corner which upon click opens a simple window
@@ -498,9 +472,6 @@ var initDemo = func
   });
   my_canvas.addEventListener("click", func(e)
   {
-    if( e.button == 1 )
-      return createLayoutTest();
-
     var dlg = canvas.Window.new([400,300], "dialog")
                            .set("resize", 1);
     var my_canvas = dlg.createCanvas()
@@ -511,9 +482,8 @@ var initDemo = func
     my_canvas.addEventListener("drag", func(e) { printf("drag: screen(%.1f|%.1f) client(%.1f|%.1f) local(%.1f|%.1f) delta(%.1f|%.1f)", e.screenX, e.screenY, e.clientX, e.clientY, e.localX, e.localY, e.deltaX, e.deltaY); });
     my_canvas.addEventListener("wheel", func(e) { printf("wheel: screen(%.1f|%.1f) client(%.1f|%.1f) %.1f", e.screenX, e.screenY, e.clientX, e.clientY, e.deltaY); });
     var root = my_canvas.createGroup();
-    root.addEventListener("test", func(e) { printf("test: %s", e.detail.test); });
-root.createChild("image")
-    .set("src", "http://wiki.flightgear.org/skins/common/images/icons-fg-135.png");
+    root.createChild("image")
+        .set("src", "http://wiki.flightgear.org/skins/common/images/icons-fg-135.png");
     var text =
       root.createChild("text")
           .setText("This could be used for building an 'Aircraft Help' dialog.\nYou can also #use it to play around with the new Canvas system :). β")
@@ -533,7 +503,6 @@ root.createChild("image")
           .set("fill", "#ff0000")
           .hide();
     var visible_count = 0;
-    text.addEventListener("click", func root.dispatchEvent(canvas.CustomEvent.new("test", {detail: {"test": "some important data.."}})));
     text.addEventListener("mouseover", func text_move.show());
     text.addEventListener("mouseout", func text_move.hide());
     text.addEventListener("mousemove", func(e) { printf("move: screen(%.1f|%.1f) client(%.1f|%.1f) local(%.1f|%.1f) delta(%.1f|%.1f)", e.screenX, e.screenY, e.clientX, e.clientY, e.localX, e.localY, e.deltaX, e.deltaY); });

Nasal/canvas/gui/Widget.nas

@@ -22,10 +22,16 @@ gui.Widget = {
     m.setSizeHint([32, 32]);
     m.setMaximumSize([m._MAX_SIZE, m._MAX_SIZE]);
 
-    m.setSetGeometryFunc(m.setGeometry);
+    m.setSetGeometryFunc(m._impl.setGeometry);
 
     return m;
   },
+  setFixedSize: func(x, y)
+  {
+    me.setMinimumSize([x, y]);
+    me.setSizeHint([x, y]);
+    me.setMaximumSize([x, y]);
+  },
   # Move the widget to the given position (relative to its parent)
   move: func(x, y)
   {
@@ -48,11 +54,11 @@ gui.Widget = {
   },
   # Set geometry of widget (usually used by layouting system)
   #
-  # @param geom [<min-x>, <min-y>, <max-x>, <max-y>]
+  # @param geom [<x>, <y>, <width>, <height>]
   setGeometry: func(geom)
   {
     me.move(geom[0], geom[1]);
-    me.setSize(geom[2] - geom[0], geom[3] - geom[1]);
+    me.setSize(geom[2], geom[3]);
     me._onStateChange();
     return me;
   },
@@ -69,7 +75,7 @@ gui.Widget = {
     me._focused = 1;
     canvas._focused_widget = me;
 
-    me.onFocusIn();
+    me._trigger("focus-in");
     me._onStateChange();
 
     return me;
@@ -83,15 +89,16 @@ gui.Widget = {
     me._focused = 0;
     me.getCanvas()._focused_widget = nil;
 
-    me.onFocusOut();
+    me._trigger("focus-out");
     me._onStateChange();
 
     return me;
   },
-  onFocusIn: func {},
-  onFocusOut: func {},
-  onMouseEnter: func {},
-  onMouseLeave: func {},
+  listen: func(type, cb)
+  {
+    me._view._root.addEventListener("cb." ~ type, cb);
+    return me;
+  },
 # protected:
   _MAX_SIZE: 32768, # size for "no size-limit"
   _onStateChange: func {},
@@ -112,7 +119,7 @@ gui.Widget = {
 
     root.addEventListener("mouseenter", func {
       me._hover = 1;
-      me.onMouseEnter();
+      me._trigger("mouse-enter");
       me._onStateChange();
     });
     root.addEventListener("mousedown", func {
@@ -121,10 +128,17 @@ gui.Widget = {
     });
     root.addEventListener("mouseleave", func {
       me._hover = 0;
-      me.onMouseLeave();
+      me._trigger("mouse-leave");
       me._onStateChange();
     });
   },
+  _trigger: func(type, data = nil)
+  {
+    me._view._root.dispatchEvent(
+      canvas.CustomEvent.new("cb." ~ type, {detail: data})
+    );
+    return me;
+  },
   _windowFocus: func
   {
     var canvas = me.getCanvas();

Nasal/canvas/gui/styles/DefaultStyle.nas

@@ -70,7 +70,7 @@ DefaultStyle.widgets.button = {
       me._label.set("fill", me._style.getColor("fg_color"));
     file ~= "button";
 
-    if( model._active )
+    if( model._down )
     {
       file ~= "-active";
       me._label.setTranslation(w / 2 + 1, h / 2 + 6);
@@ -82,7 +82,7 @@ DefaultStyle.widgets.button = {
     if( model._focused and !backdrop )
       file ~= "-focused";
 
-    if( model._hover and !model._active )
+    if( model._hover and !model._down )
     {
       file ~= "-hover";
       me._bg.set("fill", me._style.getColor("button_bg_color_hover"));
@@ -104,6 +104,9 @@ DefaultStyle.widgets.label = {
   {
     if( me['_bg'] != nil )
       me._bg.reset().rect(0, 0, w, h);
+    if( me['_img'] != nil )
+      me._img.set("size[0]", w)
+             .set("size[1]", h);
     if( me['_text'] != nil )
       # TODO different alignment
       me._text.setTranslation(2, h / 2);
@@ -115,11 +118,23 @@ DefaultStyle.widgets.label = {
       return me._deleteElement('text');
 
     me._createElement("text", "text")
-      .set("text", text);
+      .set("text", text)
+      .set("fill", "black");
 
     # TODO get real font metrics
     model.setMinimumSize([size(text) * 5 + 4, 14]);
-    model.setSizeHint([size(text) * 8 + 8, 24]);
+    model.setSizeHint([size(text) * 5 + 14, 24]);
+
+    return me;
+  },
+  setImage: func(model, img)
+  {
+    if( img == nil or size(img) == 0 )
+      return me._deleteElement('img');
+
+    me._createElement("img", "image")
+      .set("src", img)
+      .set("preserveAspectRatio", "xMidYMid slice");
 
     return me;
   },

Nasal/canvas/gui/widgets/Button.nas

@@ -4,7 +4,8 @@ gui.widgets.Button = {
     var cfg = Config.new(cfg);
     var m = gui.Widget.new(gui.widgets.Button);
     m._focus_policy = m.StrongFocus;
-    m._active = 0;
+    m._down = 0;
+    m._checkable = 0;
     m._flat = cfg.get("flat", 0);
 
     if( style != nil and !m._flat )
@@ -17,25 +18,41 @@ gui.widgets.Button = {
     me._view.setText(me, text);
     return me;
   },
-  setActive: func
+  setCheckable: func(checkable)
   {
-    if( me._active )
+    me._checkable = checkable;
+    return me;
+  },
+  setChecked: func(checked = 1)
+  {
+    if( !me._checkable or me._down == checked )
       return me;
 
-    me._active = 1;
+    me._trigger("clicked", {checked: checked});
+    me._trigger("toggled", {checked: checked});
+
+    me._down = checked;
     me._onStateChange();
     return me;
   },
-  clearActive: func
+  setDown: func(down = 1)
   {
-    if( !me._active )
+    if( me._checkable or me._down == down )
       return me;
 
-    me._active = 0;
+    me._down = down;
     me._onStateChange();
     return me;
   },
-  onClick: func {},
+  toggle: func
+  {
+    if( !me._checkable )
+      me._trigger("clicked", {checked: 0});
+    else
+      me.setChecked(!me._down);
+
+    return me;
+  },
 # protected:
   _onStateChange: func
   {
@@ -45,14 +62,11 @@ gui.widgets.Button = {
   _setView: func(view)
   {
     var el = view._root;
-    el.addEventListener("mousedown", func me.setActive());
-    el.addEventListener("mouseup",   func me.clearActive());
+    el.addEventListener("mousedown", func me.setDown(1));
+    el.addEventListener("mouseup",   func me.setDown(0));
+    el.addEventListener("click",     func me.toggle());
 
-    # Use 'call' to ensure 'me' is not set and can be used in the closure of
-    # custom callbacks. TODO pass 'me' as argument?
-    el.addEventListener("click", func call(me.onClick));
-
-    el.addEventListener("mouseleave",func me.clearActive());
+    el.addEventListener("mouseleave",func me.setDown(0));
     el.addEventListener("drag", func(e) e.stopPropagation());
 
     call(gui.Widget._setView, [view], me);

Nasal/canvas/gui/widgets/Label.nas

@@ -13,6 +13,11 @@ gui.widgets.Label = {
     me._view.setText(me, text);
     return me;
   },
+  setImage: func(img)
+  {
+    me._view.setImage(me, img);
+    return me;
+  },
   setBackground: func(bg)
   {
     me._view.setBackground(me, bg);

Nasal/canvas/gui/widgets/ScrollArea.nas

@@ -7,6 +7,7 @@ gui.widgets.ScrollArea = {
     m._scroll_pos = [0,0];
     m._max_scroll = [0, 0];
     m._content_size = [0, 0];
+    m._layout = nil;
 
     if( style != nil )
       m._setView( style.createWidget(parent, "scroll-area", cfg) );
@@ -15,6 +16,12 @@ gui.widgets.ScrollArea = {
 
     return m;
   },
+  setLayout: func(l)
+  {
+    me._layout = l;
+    l.setParent(me);
+    return me.update();
+  },
   getContent: func()
   {
     return me._view.content;
@@ -143,12 +150,30 @@ gui.widgets.ScrollArea = {
   _updateBB: func()
   {
     # TODO only update on content resize
-    var bb = me.getContent().getTightBoundingBox();
+    if( me._layout == nil )
+    {
+      var bb = me.getContent().getTightBoundingBox();
 
-    if( bb[2] < bb[0] or bb[3] < bb[1] )
-      return nil;
-    var w = bb[2] - bb[0];
-    var h = bb[3] - bb[1];
+      if( bb[2] < bb[0] or bb[3] < bb[1] )
+        return nil;
+      var w = bb[2] - bb[0];
+      var h = bb[3] - bb[1];
+
+      var cur_offset = me.getContent().getTranslation();
+      me._content_offset = [cur_offset[0] - bb[0], cur_offset[1] - bb[1]];
+    }
+    else
+    {
+      var min_size = me._layout.minimumSize();
+      var max_size = me._layout.maximumSize();
+      var size_hint = me._layout.sizeHint();
+      var w = math.min(max_size[0], math.max(math.max(min_size[0], size_hint[0]), me._size[0]));
+      var h = math.min(max_size[1], math.max(math.max(min_size[1], size_hint[1]), me._size[1]));
+      me._layout.setGeometry([0, 0, w, h]);
+
+      # Layout always has the origin at (0, 0)
+      me._content_offset = [0, 0];
+    }
 
     if( w > me._size[0] )
     {
@@ -168,8 +193,5 @@ gui.widgets.ScrollArea = {
 
     me._content_size[0] = w;
     me._content_size[1] = h;
-
-    var cur_offset = me.getContent().getTranslation();
-    me._content_offset = [cur_offset[0] - bb[0], cur_offset[1] - bb[1]];
   }
 };