// DrawText is a convenience function that will create a new image, render
// the provided text to it, paint the image to the provided window, and resize
// the window to fit the text snugly.
//
// An error can occur when rendering the text to an image.
func DrawText(win *xwindow.Window, font *truetype.Font, size float64,
fontClr, bgClr render.Color, text string) error {
// BUG(burntsushi): If `text` is zero-length, very bad things happen.
if len(text) == 0 {
text = " "
}
// Over estimate the extents.
ew, eh := xgraphics.Extents(font, size, text)
// Create an image using the over estimated extents.
img := xgraphics.New(win.X, image.Rect(0, 0, ew, eh))
xgraphics.BlendBgColor(img, bgClr.ImageColor())
// Now draw the text, grab the (x, y) position advanced by the text, and
// check for an error in rendering.
_, _, err := img.Text(0, 0, fontClr.ImageColor(), size, font, text)
if err != nil {
return err
}
// Resize the window to the geometry determined by (x, y).
win.Resize(ew, eh)
// Now draw the image to the window and destroy it.
img.XSurfaceSet(win.Id)
// subimg := img.SubImage(image.Rect(0, 0, ew, eh))
img.XDraw()
img.XPaint(win.Id)
img.Destroy()
return nil
}
// DrawText is a convenience function that will create a new image, render
// the provided text to it, paint the image to the provided window, and resize
// the window to fit the text snugly.
//
// An error can occur when rendering the text to an image.
func DrawText(win *xwindow.Window, font *truetype.Font, size float64,
fontClr, bgClr color.RGBA, text string) error {
// Over estimate the extents.
ew, eh := xgraphics.TextMaxExtents(font, size, text)
eh += misc.TextBreathe // <-- this is the bug
// Create an image using the over estimated extents.
img := xgraphics.New(win.X, image.Rect(0, 0, ew, eh))
xgraphics.BlendBgColor(img, bgClr)
// Now draw the text, grab the (x, y) position advanced by the text, and
// check for an error in rendering.
x, y, err := img.Text(0, 0, fontClr, size, font, text)
if err != nil {
return err
}
// Resize the window to the geometry determined by (x, y).
w, h := x, y+misc.TextBreathe // <-- also part of the bug
win.Resize(w, h)
// Now draw the image to the window and destroy it.
img.XSurfaceSet(win.Id)
subimg := img.SubImage(image.Rect(0, 0, w, h))
subimg.XDraw()
subimg.XPaint(win.Id)
img.Destroy()
return nil
}
// UpdateImage will repaint the active and inactive images by calling
// CycleChoice.CycleImage. This is not called when the cycle prompt is shown;
// rather the burden is on the user to make sure the prompt has the most up
// to date image.
func (ci *CycleItem) UpdateImage() {
active, inactive := ci.choice.CycleImage(), ci.choice.CycleImage()
xgraphics.Alpha(inactive, ci.cycle.theme.IconTransparency)
xgraphics.BlendBgColor(active, ci.cycle.theme.BgColor.ImageColor())
xgraphics.BlendBgColor(inactive, ci.cycle.theme.BgColor.ImageColor())
active.XSurfaceSet(ci.active.Id)
active.XDraw()
active.XPaint(ci.active.Id)
active.Destroy()
inactive.XSurfaceSet(ci.inactive.Id)
inactive.XDraw()
inactive.XPaint(ci.inactive.Id)
inactive.Destroy()
}
func main() {
X, err := xgbutil.NewConn()
if err != nil {
log.Fatal(err)
}
// Get the list of window ids managed by the window manager.
clients, err := ewmh.ClientListGet(X)
if err != nil {
log.Fatal(err)
}
// For each client, try to find its icon. If we find one, blend it with
// a nice background color and show it in its own window.
// Otherwise, skip it.
for _, wid := range clients {
// FindIcon will find an icon closest to the size specified.
// If one can't be found, the resulting image will be scaled
// automatically.
// To avoid scaling the icon, specify '0' for both the width and height.
// In this case, the largest icon found will be returned.
xicon, err := xgraphics.FindIcon(X, wid, iconWidth, iconHeight)
if err != nil {
log.Printf("Could not find icon for window %d.", wid)
continue
}
// Get the name of this client. (It will be set as the icon window's
// name.)
name, err := ewmh.WmNameGet(X, wid)
if err != nil { // not a fatal error
log.Println(err)
name = ""
}
// Blend a pink background color so its easy to see that alpha blending
// works.
xgraphics.BlendBgColor(xicon, color.RGBA{0xff, 0x0, 0xff, 0xff})
xicon.XShowExtra(name, false)
}
// All we really need to do is block, so a 'select{}' would be sufficient.
// But running the event loop will emit errors if anything went wrong.
xevent.Main(X)
}