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ImageViewer: make Hold (trigger full refresh) easier

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poire-z
2017-08-19 17:11:29 +02:00
committed by Frans de Jonge
parent 3cf419defa
commit 967a09c810
1 changed files with 5 additions and 2 deletions
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7
frontend/ui/widget/imageviewer.lua
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@@ -50,6 +50,9 @@ local ImageViewer = InputContainer:new{
image_padding = Screen:scaleBySize(2),
button_padding = Screen:scaleBySize(14),
-- sensitivity for hold (trigger full refresh) vs pan (move image)
pan_threshold = Screen:scaleBySize(5),
_scale_to_fit = nil, -- state of toggle between our 2 pre-defined scales (scale to fit / original size)
_panning = false,
-- Default centering on center of image if oversized
@@ -343,8 +346,8 @@ function ImageViewer:onHoldRelease(_, ges)
self._panning = false
self._pan_relative_x = ges.pos.x - self._pan_relative_x
self._pan_relative_y = ges.pos.y - self._pan_relative_y
if self._pan_relative_x == 0 and self._pan_relative_y == 0 then
-- Hold with no move: use this to trigger full refresh
if math.abs(self._pan_relative_x) < self.pan_threshold and math.abs(self._pan_relative_y) < self.pan_threshold then
-- Hold with no move (or less than pan_threshold): use this to trigger full refresh
UIManager:setDirty(nil, "full")
else
self:panBy(-self._pan_relative_x, -self._pan_relative_y)