func (v *ScrolledView) scrolledViewInit(width, height int) (err error) {
v.hadj, err = gtk.AdjustmentNew(0, 0, float64(width), 1, 10, float64(width))
if err != nil {
log.Println("Unable to create hadj:", err)
return
}
v.vadj, err = gtk.AdjustmentNew(0, 0, float64(height), 1, 10, float64(height))
if err != nil {
log.Println("Unable to create vadj:", err)
return
}
v.scrolled, err = gtk.ScrolledWindowNew(v.hadj, v.vadj)
if err != nil {
log.Println("Unable to create scrolled:", err)
return
}
v.scrolled.SetHExpand(true)
v.scrolled.SetVExpand(true)
return
}
func (v *ScaledView) init() (err error) {
v.layoutBox, err = gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
if err != nil {
return
}
const (
initialWidth = 800
initialHeight = 600
)
v.scene, err = ScrolledViewNew(initialWidth, initialHeight)
if err != nil {
return
}
var adj *gtk.Adjustment
adj, err = gtk.AdjustmentNew(0.0, scaleMin, scaleMax, scaleStep, scalePStep, scalePage)
v.scaler, err = gtk.ScaleNew(gtk.ORIENTATION_HORIZONTAL, adj)
if err != nil {
return
}
v.scaler.Connect("value-changed", scalerValueCallback, v)
v.layoutBox.Add(v.scene.Widget())
v.layoutBox.Add(v.scaler)
return
}
// Adjustment recast a pointer to *gtk.Adjustment.
func Adjustment(value, lower, upper, stepIncrement, pageIncrement, pageSize float64) *gtk.Adjustment {
w, _ := gtk.AdjustmentNew(value, lower, upper, stepIncrement, pageIncrement, pageSize)
return w
}