func RedrawWindow(W *XWindow, tweetsList []*TweetInfo, mouseClick [2]int) {
var Attribs C.XWindowAttributes
C.XGetWindowAttributes(W.Display, W.Window, &Attribs)
// TODO -- Do this only when resizing?
C.cairo_xlib_surface_set_size(W.Surface, Attribs.width, Attribs.height)
C.cairo_set_source_rgb(W.Cairo, 0.1, 0.1, 0.1)
C.cairo_paint(W.Cairo)
var Rect C.PangoRectangle
yPos := 10.0 + W.Scroll
WindowWidth := Attribs.width
maxTweetWidth := PixelsToPango(float64(WindowWidth - 5*UIPadding - UserImageSize))
for i := 0; i < len(tweetsList); i++ {
t := tweetsList[i]
C.pango_layout_set_width(t.Layout, maxTweetWidth)
C.pango_layout_get_extents(t.Layout, nil, &Rect)
// Get tweet text size
_, ry, _, rh := PangoRectToPixels(&Rect)
// Position and add padding
ry += yPos
if rh < UserImageSize+2*UIPadding-UIPadding {
rh = UserImageSize + 2*UIPadding
} else {
rh += UIPadding
}
// Draw rectangle around tweet
C.cairo_set_source_rgb(W.Cairo, 0.2, 0.2, 0.2)
C.cairo_rectangle(W.Cairo, UIPadding, C.double(ry), C.double(WindowWidth-2*UIPadding), C.double(rh))
C.cairo_fill(W.Cairo)
if mouseClick[0] >= UIPadding && float64(mouseClick[1]) >= ry && float64(mouseClick[1]) <= ry+rh {
fmt.Println("Clicked tweet", t.Text)
}
// Draw user image
userImage := GetCachedImage(W.UserImages, t.UserImage)
if userImage == nil || C.cairo_surface_status(userImage) != C.CAIRO_STATUS_SUCCESS {
userImage = placeholderImage
}
C.cairo_set_source_surface(W.Cairo, userImage, 2*UIPadding, C.double(yPos+UIPadding))
C.cairo_paint(W.Cairo)
// Draw tweet text
C.cairo_move_to(W.Cairo, 63, C.double(yPos+SmallPadding))
C.cairo_set_source_rgb(W.Cairo, 0.95, 0.95, 0.95)
C.pango_cairo_show_layout(W.Cairo, t.Layout)
yPos += 5 + rh
}
}
func main() {
var dpy *C.Display
var attr C.XWindowAttributes
var start C.XButtonEvent
var ev C.XEvent
var ch *C.char
if dpy != C.XOpenDisplay(ch) {
return
}
C.XGrabKey(
dpy,
C.int(C.XKeysymToKeycode(dpy, C.XStringToKeysym(C.CString("F1")))),
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.GrabModeAsync,
C.GrabModeAsync,
)
C.XGrabButton(
dpy,
1,
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.ButtonPressMask|C.ButtonReleaseMask|C.PointerMotionMask,
C.GrabModeAsync,
C.GrabModeAsync,
C.None,
C.None,
)
C.XGrabButton(
dpy,
3,
C.Mod1Mask,
C.XDefaultRootWindow(dpy),
1,
C.ButtonPressMask|C.ButtonReleaseMask|C.PointerMotionMask,
C.GrabModeAsync,
C.GrabModeAsync,
C.None,
C.None,
)
start.subwindow = C.None
for {
C.XNextEvent(dpy, &ev)
if unionToInt(ev) == C.KeyPress && unionToXKeyEvent(ev).subwindow != C.None {
C.XRaiseWindow(dpy, unionToXKeyEvent(ev).subwindow)
} else if unionToInt(ev) == C.ButtonPress && unionToXButtonEvent(ev).subwindow != C.None {
C.XGetWindowAttributes(dpy, unionToXButtonEvent(ev).subwindow, &attr)
start = *unionToXButtonEvent(ev)
} else if unionToInt(ev) == C.MotionNotify && start.subwindow != C.None {
xdiff := unionToXButtonEvent(ev).x_root - start.x_root
ydiff := unionToXButtonEvent(ev).y_root - start.y_root
var toDiffX C.int
var toDiffY C.int
if start.button == 1 {
toDiffX = xdiff
toDiffY = ydiff
}
var toWidth C.int
var toHeight C.int
if start.button == 3 {
toWidth = xdiff
toHeight = ydiff
}
C.XMoveResizeWindow(
dpy,
start.subwindow,
attr.x+toDiffX,
attr.y+toDiffY,
max(1, attr.width+toWidth),
max(1, attr.height+toHeight))
} else if unionToInt(ev) == C.ButtonRelease {
start.subwindow = C.None
}
}
}