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ui: Resize canvas size when the window is resized (#387)

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This commit is contained in:
Hajime Hoshi 2017-07-22 02:04:03 +09:00
parent 63e3bc73d6
commit 5ae03494f2
1 changed files with 12 additions and 6 deletions
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18
internal/ui/ui_js.go
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@ -182,6 +182,9 @@ func initialize() error {
window.Call("addEventListener", "blur", func() {
currentUI.windowFocus = false
})
window.Call("addEventListener", "resize", func() {
currentUI.updateScreenSize()
})
// Adjust the initial scale to 1.
// https://developer.mozilla.org/en/docs/Mozilla/Mobile/Viewport_meta_tag
@ -345,7 +348,11 @@ func (u *userInterface) setScreenSize(width, height int, scale float64, fullscre
u.height = height
u.scale = scale
u.fullscreen = fullscreen
u.updateScreenSize()
return true
}
func (u *userInterface) updateScreenSize() {
// CSS imageRendering seems useful to enlarge the screen,
// but doesn't work in some cases (#306):
// * Chrome just after restoring the lost context
@ -353,13 +360,13 @@ func (u *userInterface) setScreenSize(width, height int, scale float64, fullscre
// Let's use the pixel ratio as it is here.
u.deviceScale = devicePixelRatio()
canvas.Set("width", int(float64(width)*u.actualScreenScale()))
canvas.Set("height", int(float64(height)*u.actualScreenScale()))
canvas.Set("width", int(float64(u.width)*u.actualScreenScale()))
canvas.Set("height", int(float64(u.height)*u.actualScreenScale()))
canvasStyle := canvas.Get("style")
scale = u.getScale()
cssWidth := int(float64(width) * scale)
cssHeight := int(float64(height) * scale)
s := u.getScale()
cssWidth := int(float64(u.width) * s)
cssHeight := int(float64(u.height) * s)
canvasStyle.Set("width", strconv.Itoa(cssWidth)+"px")
canvasStyle.Set("height", strconv.Itoa(cssHeight)+"px")
// CSS calc requires space chars.
@ -367,5 +374,4 @@ func (u *userInterface) setScreenSize(width, height int, scale float64, fullscre
canvasStyle.Set("top", "calc((100% - "+strconv.Itoa(cssHeight)+"px) / 2)")
u.sizeChanged = true
return true
}