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 ShowLayout(cr0 *cairo.Context, layout0 pango.LayoutLike) {
var cr1 *C.cairoContext
var layout1 *C.PangoLayout
if cr0 != nil {
cr1 = (*C.cairoContext)(cr0.C)
}
if layout0 != nil {
layout1 = layout0.InheritedFromPangoLayout()
}
C.pango_cairo_show_layout(cr1, layout1)
}
//void pango_cairo_show_layout (cairo_t *cr,
// PangoLayout *layout);
func CairoShowLayout(cr *cairo.Context, layout *Layout) {
C.pango_cairo_show_layout(cairo_context(cr), layout.native())
}