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Implement drag scrolling for the diff kitten

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Kovid Goyal
2023-03-29 17:14:13 +05:30
parent 05e10d8066
commit 37edc728a9
2 changed files with 62 additions and 0 deletions
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18
kittens/diff/mouse.go
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@@ -96,10 +96,28 @@ func (self *Handler) start_mouse_selection(ev *loop.MouseEvent) {
self.mouse_selection.StartNewSelection(ev, self.line_pos_from_pos(ev.Cell.X, pos), 0, self.screen_size.num_lines-1, self.screen_size.cell_width, self.screen_size.cell_height)
}
func (self *Handler) drag_scroll_tick(timer_id loop.IdType) error {
return self.mouse_selection.DragScrollTick(timer_id, self.lp, self.drag_scroll_tick, func(amt int, ev *loop.MouseEvent) error {
if self.scroll_lines(amt) != 0 {
self.do_update_mouse_selection(ev)
self.draw_screen()
}
return nil
})
}
func (self *Handler) update_mouse_selection(ev *loop.MouseEvent) {
if !self.mouse_selection.IsActive() {
return
}
if self.mouse_selection.OutOfVerticalBounds(ev) {
self.mouse_selection.DragScroll(ev, self.lp, self.drag_scroll_tick)
return
}
self.do_update_mouse_selection(ev)
}
func (self *Handler) do_update_mouse_selection(ev *loop.MouseEvent) {
pos := self.scroll_pos
y := ev.Cell.Y
y = utils.Max(0, utils.Min(y, self.screen_size.num_lines-1))