all tasks

Task/Window-creation-X11/Go/window-creation-x11.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+    "code.google.com/p/x-go-binding/xgb"
+    "fmt"
+)
+
+func main() {
+    c, err := xgb.Dial("")
+    if err != nil {
+        fmt.Println(err)
+        return
+    }
+    defer c.Close()
+
+    strBytes := []byte("Hello XGB!")
+    rectangles := []xgb.Rectangle{{40, 40, 20, 20}}
+
+    // get the first screen
+    s := c.DefaultScreen()
+
+    // root window
+    win := s.Root
+
+    // create black (foreground) graphic context
+    fg := c.NewId()
+    mask := uint32(xgb.GCForeground | xgb.GCGraphicsExposures)
+    values := []uint32{s.BlackPixel, 0}
+    c.CreateGC(fg, win, mask, values)
+
+    // create white (background) graphic context
+    bg := c.NewId()
+    mask = uint32(xgb.GCBackground | xgb.GCGraphicsExposures)
+    values[0] = s.WhitePixel // (values[1] still 0)
+    c.CreateGC(bg, win, mask, values)
+
+    //  create the window
+    win = c.NewId()
+    mask = xgb.CWBackPixel | xgb.CWEventMask
+    // values[0] still s.WhitePixel
+    values[1] = xgb.EventMaskExposure | xgb.EventMaskKeyPress
+    c.CreateWindow(0, win, s.Root, 0, 0, 150, 150, 10,
+        xgb.WindowClassInputOutput, s.RootVisual, mask, values)
+    c.MapWindow(win)
+
+    for {
+        event, err := c.WaitForEvent()
+        if err != nil {
+            fmt.Println(err)
+            return
+        }
+        switch event.(type) {
+        case xgb.ExposeEvent:
+            c.PolyRectangle(win, fg, rectangles)
+            c.ImageText8(win, bg, 20, 20, strBytes)
+        case xgb.KeyPressEvent:
+            return
+        }
+    }
+}