525 lines
13 KiB
Text
525 lines
13 KiB
Text
#
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# FlightGear canvas gui
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# Namespace: canvas
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#
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# Classes:
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# WindowButton
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# Window
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#
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# see also api.nas
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var gui = {
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widgets: {},
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focused_window: nil,
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region_highlight: nil,
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# Window/dialog stacking order
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STACK_INDEX: {
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"default": 0,
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"always-on-top": 1,
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"tooltip": 2
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}
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};
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var gui_dir = getprop("/sim/fg-root") ~ "/Nasal/canvas/gui/";
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var loadGUIFile = func(file) io.load_nasal(gui_dir ~ file, "canvas");
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var loadWidget = func(name) loadGUIFile("widgets/" ~ name ~ ".nas");
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var loadDialog = func(name) loadGUIFile("dialogs/" ~ name ~ ".nas");
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loadGUIFile("Config.nas");
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loadGUIFile("Style.nas");
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loadGUIFile("Widget.nas");
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loadGUIFile("styles/DefaultStyle.nas");
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loadWidget("Button");
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loadWidget("CheckBox");
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loadWidget("Label");
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loadWidget("LineEdit");
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loadWidget("ScrollArea");
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loadDialog("InputDialog");
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loadDialog("MessageBox");
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var style = DefaultStyle.new("AmbianceClassic", "Humanity");
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var WindowButton = {
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new: func(parent, name)
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{
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var m = {
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parents: [WindowButton, gui.widgets.Button.new(parent, nil, {"flat": 1})],
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_name: name
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};
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m._focus_policy = m.NoFocus;
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m._setView({_root: parent.createChild("image", "WindowButton-" ~ name)});
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return m;
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},
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# protected:
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_onStateChange: func
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{
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var file = style._dir_decoration ~ "/" ~ me._name;
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var window_focus = me._windowFocus();
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file ~= window_focus ? "_focused" : "_unfocused";
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if( me._down )
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file ~= "_pressed";
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else if( me._hover )
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file ~= "_prelight";
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else if( window_focus )
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file ~= "_normal";
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me._view._root.set("src", file ~ ".png");
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}
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};
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var Window = {
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# Constructor
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#
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# @param size ([width, height])
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new: func(size, type = nil, id = nil)
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{
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var ghost = _newWindowGhost(id);
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var m = {
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parents: [Window, PropertyElement, ghost],
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_ghost: ghost,
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_node: props.wrapNode(ghost._node_ghost),
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_focused: 0,
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_widgets: [],
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_frame_width: 4,
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_title_bar_height: 25,
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};
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m.setInt("content-size[0]", size[0]);
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m.setInt("content-size[1]", size[1]);
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# TODO better default position
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m.move(0,0);
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m.setFocus();
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# arg = [child, listener_node, mode, is_child_event]
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setlistener(m._node, func m._propCallback(arg[0], arg[2]), 0, 2);
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if( type )
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m.set("type", type);
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return m;
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},
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# Destructor
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del: func
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{
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me._title.del();
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me.clearFocus();
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if( me["_canvas"] != nil )
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{
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var placements = me._canvas._node.getChildren("placement");
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# Do not remove canvas if other placements exist
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if( size(placements) > 1 ) {
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foreach(var p; placements)
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{
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if( p.getValue("type") == "window"
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and p.getValue("id") == me.get("id") )
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p.remove();
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}
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}
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else {
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me._canvas.del();
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}
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me._canvas = nil;
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}
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if (me._node != nil) {
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me._node.remove();
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me._node = nil;
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}
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},
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setTitle: func(title)
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{
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return me.set("title", title);
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},
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# Create the canvas to be used for this Window
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#
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# @return The new canvas
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createCanvas: func()
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{
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var size = [
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me.get("content-size[0]"),
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me.get("content-size[1]")
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];
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me._canvas = new({
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size: [size[0], size[1]],
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view: size,
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placement: {
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type: "window",
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id: me.get("id")
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},
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# Standard alpha blending
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"blend-source-rgb": "src-alpha",
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"blend-destination-rgb": "one-minus-src-alpha",
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# Just keep current alpha (TODO allow using rgb textures instead of rgba?)
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"blend-source-alpha": "zero",
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"blend-destination-alpha": "one"
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});
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me._canvas._focused_widget = nil;
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me._canvas.data("focused", me._focused);
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me._canvas.addEventListener("mousedown", func me.raise());
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return me._canvas;
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},
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# Set an existing canvas to be used for this Window
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setCanvas: func(canvas_)
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{
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if( ghosttype(canvas_) != "Canvas" )
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return debug.warn("Not a Canvas");
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canvas_.addPlacement({type: "window", "id": me.get("id")});
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me['_canvas'] = canvas_;
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canvas_._focused_widget = nil;
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canvas_.data("focused", me._focused);
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# prevent resizing if canvas is placed from somewhere else
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me.onResize = nil;
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},
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# Get the displayed canvas
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getCanvas: func(create = 0)
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{
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if( me['_canvas'] == nil and create )
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me.createCanvas();
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return me['_canvas'];
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},
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getCanvasDecoration: func()
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{
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return wrapCanvas(me._getCanvasDecoration());
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},
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setLayout: func(l)
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{
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if( me['_canvas'] == nil )
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me.createCanvas();
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me._canvas.update(); # Ensure placement is applied
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me._ghost.setLayout(l);
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return me;
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},
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#
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setFocus: func
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{
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if( me._focused )
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return me;
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if( gui.focused_window != nil )
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gui.focused_window.clearFocus();
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me._focused = 1;
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# me.onFocusIn();
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me._onStateChange();
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gui.focused_window = me;
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setInputFocus(me);
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return me;
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},
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#
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clearFocus: func
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{
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if( !me._focused )
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return me;
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me._focused = 0;
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# me.onFocusOut();
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me._onStateChange();
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gui.focused_window = nil;
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setInputFocus(nil);
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return me;
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},
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setPosition: func
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{
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if( size(arg) == 1 )
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var arg = arg[0];
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var (x, y) = arg;
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me.setInt("tf/t[0]", x);
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me.setInt("tf/t[1]", y);
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},
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setSize: func
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{
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if( size(arg) == 1 )
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var arg = arg[0];
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var (w, h) = arg;
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me.set("content-size[0]", w);
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me.set("content-size[1]", h);
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if( me.onResize != nil )
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me.onResize();
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return me;
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},
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getSize: func
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{
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var w = me.get("content-size[0]");
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var h = me.get("content-size[1]");
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return [w,h];
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},
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move: func
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{
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if( size(arg) == 1 )
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var arg = arg[0];
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var (x, y) = arg;
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me.setInt("tf/t[0]", me.get("tf/t[0]", 10) + x);
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me.setInt("tf/t[1]", me.get("tf/t[1]", 30) + y);
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},
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# Raise to top of window stack
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raise: func()
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{
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# on writing the z-index the window always is moved to the top of all other
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# windows with the same z-index.
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me.setInt("z-index", me.get("z-index", gui.STACK_INDEX["default"]));
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me.setFocus();
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},
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onResize: func()
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{
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if( me['_canvas'] == nil )
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return;
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for(var i = 0; i < 2; i += 1)
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{
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var size = me.get("content-size[" ~ i ~ "]");
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me._canvas.set("size[" ~ i ~ "]", size);
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me._canvas.set("view[" ~ i ~ "]", size);
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}
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},
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# protected:
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_onStateChange: func
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{
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var event = canvas.CustomEvent.new("wm.focus-" ~ (me._focused ? "in" : "out"));
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if( me._getCanvasDecoration() != nil )
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{
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# Stronger shadow for focused windows
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me.getCanvasDecoration()
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.set("image[1]/fill", me._focused ? "#000000" : "rgba(0,0,0,0.5)");
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var suffix = me._focused ? "" : "-unfocused";
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me._title_bar_bg.set("fill", style.getColor("title" ~ suffix));
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me._frame.setStroke(style.getColor("title" ~ suffix));
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me._title.setColor(style.getColor("title-text" ~ suffix));
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me._top_line.setStroke(style.getColor("title-highlight" ~ suffix));
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me.getCanvasDecoration()
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.data("focused", me._focused)
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.dispatchEvent(event);
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}
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if( me.getCanvas() != nil )
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me.getCanvas()
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.data("focused", me._focused)
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.dispatchEvent(event);
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},
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# private:
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_propCallback: func(child, mode)
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{
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if( !me._node.equals(child.getParent()) )
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return;
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var name = child.getName();
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# support for CSS like position: absolute; with right and/or bottom margin
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if( name == "right" )
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me._handlePositionAbsolute(child, mode, name, 0);
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else if( name == "bottom" )
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me._handlePositionAbsolute(child, mode, name, 1);
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# update decoration on type change
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else if( name == "type" )
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{
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if( mode == 0 )
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settimer(func me._updateDecoration(), 0, 1);
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}
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else if( name.starts_with("resize-") )
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{
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if( mode == 0 )
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me._handleResize(child, name);
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}
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else if( name == "size" )
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{
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if( mode == 0 )
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me._resizeDecoration();
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}
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},
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_handlePositionAbsolute: func(child, mode, name, index)
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{
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# mode
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# -1 child removed
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# 0 value changed
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# 1 child added
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if( mode == 0 )
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me._updatePos(index, name);
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else if( mode == 1 )
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me["_listener_" ~ name] = [
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setlistener
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(
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"/sim/gui/canvas/size[" ~ index ~ "]",
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func me._updatePos(index, name)
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),
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setlistener
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(
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me._node.getNode("content-size[" ~ index ~ "]"),
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func me._updatePos(index, name)
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)
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];
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else if( mode == -1 )
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for(var i = 0; i < 2; i += 1)
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removelistener(me["_listener_" ~ name][i]);
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},
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_updatePos: func(index, name)
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{
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me.setInt
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(
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"tf/t[" ~ index ~ "]",
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getprop("/sim/gui/canvas/size[" ~ index ~ "]")
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- me.get(name)
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- me.get("content-size[" ~ index ~ "]")
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);
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},
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_handleResize: func(child, name)
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{
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var is_status = name == "resize-status";
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if( !is_status and !me["_resize"] )
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return;
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var min_size = [75, 100];
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var x = me.get("tf/t[0]");
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var y = me.get("tf/t[1]");
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var old_size = [me.get("size[0]"), me.get("size[1]")];
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var l = x + math.min(me.get("resize-left"), old_size[0] - min_size[0]);
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var t = y + math.min(me.get("resize-top"), old_size[1] - min_size[1]);
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var r = x + math.max(me.get("resize-right"), min_size[0]);
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var b = y + math.max(me.get("resize-bottom"), min_size[1]);
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if( is_status )
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{
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me._resize = child.getValue();
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if( me._resize and gui.region_highlight == nil )
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gui.region_highlight =
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getDesktop().createChild("path", "highlight")
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.set("stroke", "#ffa500")
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.set("stroke-width", 2)
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.set("fill", "rgba(255, 165, 0, 0.15)")
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.set("z-index", 100);
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else if( !me._resize and gui.region_highlight != nil )
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{
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gui.region_highlight.hide();
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me.setPosition(l, t);
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me.setSize
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(
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me.get("content-size[0]") + (r - l) - old_size[0],
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me.get("content-size[1]") + (b - t) - old_size[1],
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);
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if( me.onResize != nil )
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me.onResize();
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return;
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}
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}
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else if( !me["_resize"] )
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return;
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gui.region_highlight.reset()
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.moveTo(l, t)
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.horizTo(r)
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.vertTo(b)
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.horizTo(l)
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.close()
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.update()
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.show();
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},
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_updateDecoration: func()
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{
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var border_radius = 9;
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me.set("decoration-border", "25 1 1");
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me.set("shadow-inset", int((1 - math.cos(45 * D2R)) * border_radius + 0.5));
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me.set("shadow-radius", 5);
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me.setBool("update", 1);
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var canvas_deco = me.getCanvasDecoration();
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canvas_deco.addEventListener("mousedown", func me.raise());
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canvas_deco.set("blend-source-rgb", "src-alpha");
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canvas_deco.set("blend-destination-rgb", "one-minus-src-alpha");
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canvas_deco.set("blend-source-alpha", "one");
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canvas_deco.set("blend-destination-alpha", "one");
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var group_deco = canvas_deco.getGroup("decoration");
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var title_bar = group_deco.createChild("group", "title_bar");
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me._title_bar_bg = title_bar.createChild("path");
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me._top_line = title_bar.createChild("path", "top-line");
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me._frame = title_bar.createChild("path");
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me._frame.set("fill", "none");
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me._frame.set("stroke-width", me._frame_width);
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# close icon
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var x = 10;
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var y = 3;
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var w = 19;
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var h = 19;
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var button_close = WindowButton.new(title_bar, "close")
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.move(x, y);
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button_close.listen("clicked", func me.del());
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# title
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var title = me.get("title", "Canvas Dialog");
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me._title = title_bar.createChild("text", "title")
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.setText(title)
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.setAlignment("left-center")
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.set("character-size", 14)
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.setFont("LiberationFonts/LiberationSans-Bold.ttf")
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.setTranslation(int(x + 1.5 * w + 0.5), int(y + 0.5 * h + 0.5));
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me._node.getNode("title", 1).alias(me._title._node.getPath() ~ "/text");
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title_bar.addEventListener("drag", func(e) me.move(e.deltaX, e.deltaY));
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me._resizeDecoration();
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me._onStateChange();
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},
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_resizeDecoration: func()
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{
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if( me["_title_bar_bg"] == nil )
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return;
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var border_radius = 9;
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me._title_bar_bg
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.reset()
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.rect( 0, 0,
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me.get("size[0]"), me._title_bar_height,
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{"border-top-radius": border_radius} );
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me._frame
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.reset()
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.rect( 0, 0,
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me.get("size[0]"), me.get("size[1]"),
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{"border-top-radius": border_radius} );
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me._top_line
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.reset()
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.moveTo(border_radius - 2, 2)
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.lineTo(me.get("size[0]") - border_radius + 2, 2);
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}
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}; #Window
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# Clear focus on click outside any window
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getDesktop().addEventListener("mousedown", func {
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if( gui.focused_window != nil )
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gui.focused_window.clearFocus();
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});
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# Provide old 'Dialog' for backwards compatiblity (should be removed for 3.0)
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var Dialog = {
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new: func(size, type = nil, id = nil)
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{
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debug.warn("'canvas.Dialog' is deprectated! (use canvas.Window instead)");
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return Window.new(size, type, id);
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}
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};
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