hbspbar

bspwm status bar
git clone https://hhvn.uk/hbspbar
git clone git://hhvn.uk/hbspbar
Log | Files | Refs

x.go (2210B)

      1 package drw // import "hhvn.uk/hbspbar/drw"
      2 
      3 import (
      4 	"os"
      5 	"image"
      6 
      7 	"hhvn.uk/hbspbar/config"
      8 	"hhvn.uk/hbspbar/common"
      9 
     10 	"github.com/jezek/xgb"
     11 	"github.com/jezek/xgb/xproto"
     12 	"github.com/jezek/xgbutil"
     13 	"github.com/jezek/xgbutil/icccm"
     14 	"github.com/jezek/xgbutil/ewmh"
     15 	"github.com/jezek/xgbutil/xgraphics"
     16 	"github.com/BurntSushi/freetype-go/freetype/truetype"
     17 )
     18 
     19 type eventwrap struct {
     20 	Ev  xgb.Event
     21 	Err error
     22 }
     23 
     24 var InitErr error
     25 var Events  chan *eventwrap
     26 
     27 var xc      *xgb.Conn
     28 var xu      *xgbutil.XUtil
     29 var screen  *xproto.ScreenInfo
     30 var font    *truetype.Font
     31 
     32 func init() {
     33 	var err error
     34 
     35 	xc, err = xgb.NewConn()
     36 	if err != nil {
     37 		InitErr = err
     38 		return
     39 	}
     40 
     41 	xu, err = xgbutil.NewConnXgb(xc)
     42 	if err != nil {
     43 		InitErr = err
     44 		return
     45 	}
     46 
     47 	setup := xproto.Setup(xc)
     48 	screen = setup.DefaultScreen(xc)
     49 
     50 	read, err := os.Open(config.Font)
     51 	if err != nil {
     52 		InitErr = common.Perror("os.Open", err)
     53 		return
     54 	}
     55 
     56 	font, err = xgraphics.ParseFont(read)
     57 	if err != nil {
     58 		InitErr = common.Perror("xgraphics.ParseFont", err)
     59 		return
     60 	}
     61 
     62 	Events := make(chan *eventwrap)
     63 
     64 	go func() { for {
     65 		ev, err := xc.WaitForEvent()
     66 		w := eventwrap{ev, err}
     67 		Events <- &w
     68 	}}()
     69 }
     70 
     71 type Window struct {
     72 	id xproto.Window
     73 }
     74 
     75 func WindowCreate(x, y, w, h uint) (*Window, error) {
     76 	var win Window
     77 	var err error
     78 
     79 	win.id, err = xproto.NewWindowId(xc)
     80 	if err != nil {
     81 		return nil, common.Perror("xproto.NewWindowId", err)
     82 	}
     83 
     84 	xproto.CreateWindow(xc, screen.RootDepth, win.id, screen.Root,
     85 		int16(x), int16(y), uint16(w), uint16(h), 0,
     86 		xproto.WindowClassInputOutput, screen.RootVisual,
     87 		xproto.CwBackPixel|xproto.CwEventMask, []uint32{
     88 			0x00000000,
     89 			xproto.EventMaskStructureNotify })
     90 
     91 	class := icccm.WmClass{"hbspbar", "hbspbar"}
     92 	icccm.WmClassSet(xu, win.id, &class)
     93 
     94 	ewmh.WmWindowTypeSet(xu, win.id, []string{"_NET_WM_WINDOW_TYPE_DOCK"})
     95 
     96 	err = xproto.MapWindowChecked(xc, win.id).Check()
     97 	if err != nil {
     98 		return nil, common.Perror("xproto.MapWindow", err)
     99 	}
    100 
    101 	return &win, nil
    102 }
    103 
    104 func (w *Window) Paint(i image.Image) {
    105 	xgr := xgraphics.NewConvert(xu, i)
    106 
    107 	xgr.XSurfaceSet(w.id)
    108 	xgr.XDraw()
    109 	xgr.XPaint(w.id)
    110 	xgr.Destroy()
    111 }
    112 
    113 func (w *Window) Destroy() {
    114 	xproto.DestroyWindow(xc, w.id)
    115 }