GraphicsContext wrapper

lib/x11/xcore.js

@@ -206,11 +206,12 @@ XClient.prototype.expectReplyHeader = function()
                     // if (error_code == 14)
                     {
                         var res = buf.unpack('LSC');
-                        error.badPparam = res[0]; // id: GC, WinID, Font, Atom etc; Value
+                        error.badParam = res[0]; // id: GC, WinID, Font, Atom etc; Value
                         error.minorOpcode = res[1];
                         error.majorOpcode = res[2];                       
                     }
-                    client.emit('error', error);
+                    console.log(error);
+                    //client.emit('error', error);
                     client.expectReplyHeader();
                 } ); 
                 return;
@@ -220,7 +221,6 @@ XClient.prototype.expectReplyHeader = function()
                     var extra = res[3];
                     var ev = client.unpackEvent(type, seq_num, extra, buf);
                     client.emit('event', ev);
-                    console.log(ev);
                     var ee = client.event_consumers[ev.wid];
                     if (ee) {
                        ee.emit('event', ev);

test/polypoint.js

@@ -5,7 +5,6 @@ var Exposure = x11.eventMask.Exposure;
 var PointerMotion = x11.eventMask.PointerMotion;
 var pts = [];
 
-
 xclient.on('connect', function(display) {
     var X = this;
     var root = display.screen[0].root;

test/testwnd.js

@@ -5,33 +5,21 @@ var width = 700;
 var height = 500;
 
 var xclient = x11.createClient();
+var pts = [];
+
 xclient.on('connect', function(display) {
-    var white = xclient.display.screen[0].white_pixel;
-    var black = xclient.display.screen[0].black_pixel;
 
-    var mainwnd = new Window(xclient, 0, 0, width, height, white);
-    mainwnd.on('mousemove', function(ev) {
-        console.log(ev.x, ev.y); 
+    var mainwnd = new Window(xclient, 0, 0, width, height);
+    mainwnd.on('mousemove', function(ev) 
+    {
+        pts.push(ev.x); 
+        pts.push(ev.y);
+        this.gc.drawText(ev.x, ev.y, 'Hello, NodeJS!');
+    });
+    mainwnd.on('expose', function(ev) {        
+        for (var i=0; i < pts.length/2 ; ++i)
+            ev.gc.drawText(pts[i], pts[i+1], 'Hello, NodeJS!');
     });
-    var ch = new Window(mainwnd, 10, 10, 50, 70, black);
-            ch.on('mousemove', function(ev) {
-                console.log(ev);
-                //ch.unmap();
-                //setTimeout( function() { ch.map() }, 500);
-            });
-
     mainwnd.map();
-    /*    
-    for (var x = 0; x < width; x += 20) {
-        for (var y = 0; y < width; y += 20) {
-            // TODO: wnd.createChild() ?
-            var ch = new Window(mainwnd, x + 1, y + 1, 18, 18, 0, black);
-            //ch.map();
-            ch.on('mousemove', function(ev) {
-                ch.unmap();
-                setTimeout( function() { ch.map() }, 500);
-            });
-        }
-    }
-    */
+
 });

test/wndwrap.js

@@ -1,7 +1,35 @@
+var x11 = require('../lib/x11');
+var Exposure = x11.eventMask.Exposure;
+var PointerMotion = x11.eventMask.PointerMotion;
+
 var EventEmitter = require('events').EventEmitter;
 var util = require('util'); // util.inherits
 
-function Window(parent, x, y, w, h, bg)
+function GraphicContext(win)
+{
+    this.win = win;
+    this.xclient = win.xclient;
+    this.id = this.xclient.AllocID();
+    win.xclient.CreateGC(this.id, win.id);
+}
+
+GraphicContext.prototype.polyLine = function(points)
+{
+    this.xclient.PolyLine(0, this.win.id, this.id, points);    
+}
+
+GraphicContext.prototype.noop = function()
+{
+    //testing triggering gc creation
+}
+
+GraphicContext.prototype.drawText = function(x, y, text)
+{
+    //console.log([0, this.win.id, this.id, x, y, [text]]);
+    this.xclient.PolyText8(this.win.id, this.id, x, y, [text]);    
+}
+
+function Window(parent, x, y, w, h)
 {
     if (parent.constructor && parent.constructor.name == 'XClient')
     {
@@ -27,7 +55,8 @@ function Window(parent, x, y, w, h, bg)
     this.y = y;
     this.w = w;
     this.h = h;
-    this.bg = bg;
+    this.black = this.xclient.display.screen[0].black_pixel;
+    this.white = this.xclient.display.screen[0].white_pixel;
     this.id = this.xclient.AllocID();
 
     var borderWidth = 1;
@@ -37,25 +66,38 @@ function Window(parent, x, y, w, h, bg)
         this.id, this.parent.id, this.x, this.y, this.w, this.h, 
         borderWidth, _class, visual, 
         { 
-          backgroundPixel: this.bg, 
-          eventMask: 0x00000040 
+            backgroundPixel: this.white, 
+            eventMask: Exposure|PointerMotion
         }
     );
-    //this.map();
 
+    //this.map();
     var wnd = this;
     eventType2eventName = {
-        6: 'mousemove'
+        6: 'mousemove',
+       12: 'expose'
     };
 
     var ee = new EventEmitter();
     this.xclient.event_consumers[wnd.id] = ee;
     // TODO: do we need to have wnd as EventEmitter AND EventEmitter stored in event_consumers ?
     ee.on('event', function( ev )
-    {   
+    {
+        if (ev.type == 12) //Expose
+            ev.gc = wnd.gc;
+
         wnd.emit(eventType2eventName[ev.type], ev); // convert to mousemove? (ev is already event-spacific)               
     });    
     // TODO: track delete events and remove wmd from consumers list
+   
+    this.__defineGetter__('gc', function()
+    {
+       if (!this._gc)
+       {
+           this._gc = new GraphicContext(this);
+       } 
+       return this._gc;
+    });
 }
 util.inherits(Window, EventEmitter);
 
@@ -67,4 +109,4 @@ Window.prototype.unmap = function() {
     this.xclient.UnmapWindow(this.id);
 }
 
-module.exports = Window;
+module.exports = Window;