onScroll receives mouse scroll events when this scroller has the scroll focus (set by OnMouseEnter)
(evname string, ev interface{})
| 275 | |
| 276 | // onScroll receives mouse scroll events when this scroller has the scroll focus (set by OnMouseEnter) |
| 277 | func (s *Scroller) onScroll(evname string, ev interface{}) { |
| 278 | |
| 279 | sev := ev.(*window.ScrollEvent) |
| 280 | |
| 281 | vScrollVisible := (s.vscroll != nil) && s.vscroll.Visible() |
| 282 | hScrollVisible := (s.hscroll != nil) && s.hscroll.Visible() |
| 283 | |
| 284 | mult := float32(1) / float32(10) |
| 285 | offsetX := sev.Xoffset * mult |
| 286 | offsetY := sev.Yoffset * mult |
| 287 | |
| 288 | // If modifier key is pressed (left shift by default) - then scroll in the horizontal direction |
| 289 | if sev.Mods&ScrollModifierKey > 0 { |
| 290 | if math32.Abs(offsetY) > math32.Abs(offsetX) { |
| 291 | offsetX = offsetY |
| 292 | } |
| 293 | offsetY = 0 |
| 294 | } |
| 295 | |
| 296 | log.Error("X: %v, Y: %v", offsetX, offsetY) |
| 297 | |
| 298 | if vScrollVisible { |
| 299 | if hScrollVisible { |
| 300 | // Both scrollbars are present - scroll both |
| 301 | s.vscroll.SetValue(float32(s.vscroll.Value()) - offsetY) |
| 302 | s.hscroll.SetValue(float32(s.hscroll.Value()) - offsetX) |
| 303 | } else { |
| 304 | // Only vertical scrollbar present - scroll it |
| 305 | s.vscroll.SetValue(float32(s.vscroll.Value()) - offsetY) |
| 306 | } |
| 307 | } else if hScrollVisible { |
| 308 | // Only horizontal scrollbar present - scroll it |
| 309 | s.hscroll.SetValue(float32(s.hscroll.Value()) - offsetX) |
| 310 | } |
| 311 | |
| 312 | s.recalc() |
| 313 | } |
| 314 | |
| 315 | // onResize receives resize events |
| 316 | func (s *Scroller) onResize(evname string, ev interface{}) { |