ListBoxes Overhaul

* Overhaul the clunky old alpha Edit Level/Doodad menu with a modernized
  version featuring the new ListBox widget.
* The new level loader is a Window that can be spawned from anywhere instead
  of on a dedicated MenuScene.

Updates to doodad scripts:

* Actor.IsOnScreen() checks whether an actor's visual sprite box is on-screen
  in the level viewport. `Self.IsOnScreen()` will check for the current actor.

Other changes

* PlaySound() to deduplicate the same sound effect from playing at once.

go.mod

@@ -3,25 +3,24 @@ module git.kirsle.net/SketchyMaze/doodle
 go 1.16
 
 require (
-	git.kirsle.net/go/audio v0.0.0-20201121073642-65068820cbc0
+	git.kirsle.net/go/audio v0.0.0-20230310065553-fa6eb3d3a029
 	git.kirsle.net/go/log v0.0.0-20200902035305-70ac2848949b
 	git.kirsle.net/go/render v0.0.0-20220505053906-129a24300dfa
-	git.kirsle.net/go/ui v0.0.0-20221010004159-d82ef0b75165
+	git.kirsle.net/go/ui v0.0.0-20230409041824-8716c479e90b
 	github.com/aichaos/rivescript-go v0.3.1
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
-	github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91
+	github.com/dlclark/regexp2 v1.9.0 // indirect
+	github.com/dop251/goja v0.0.0-20230402114112-623f9dda9079
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/gen2brain/dlgs v0.0.0-20220603100644-40c77870fa8d
+	github.com/google/pprof v0.0.0-20230406165453-00490a63f317 // indirect
 	github.com/google/uuid v1.3.0
 	github.com/gopherjs/gopherjs v1.17.2 // indirect
 	github.com/kirsle/configdir v0.0.0-20170128060238-e45d2f54772f
 	github.com/robertkrimen/otto v0.0.0-20211024170158-b87d35c0b86f // indirect
 	github.com/tomnomnom/xtermcolor v0.0.0-20160428124646-b78803f00a7e // indirect
-	github.com/urfave/cli/v2 v2.19.2
+	github.com/urfave/cli/v2 v2.25.1
-	github.com/veandco/go-sdl2 v0.4.25
+	github.com/veandco/go-sdl2 v0.4.34
-	golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2 // indirect
+	golang.org/x/crypto v0.8.0 // indirect
-	golang.org/x/image v0.0.0-20220902085622-e7cb96979f69
+	golang.org/x/image v0.7.0
-	golang.org/x/sys v0.0.0-20221010170243-090e33056c14 // indirect
-	golang.org/x/term v0.0.0-20220919170432-7a66f970e087 // indirect
 )

go.sum

@@ -37,19 +37,16 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-git.kirsle.net/go/audio v0.0.0-20201121073642-65068820cbc0 h1:cTJeG7Rf51Uc1LGEc8HfRuSGcN3rDREQiit31NAYMDw=
+git.kirsle.net/go/audio v0.0.0-20230310065553-fa6eb3d3a029 h1:B0JKY/0NlXWlnZdf9dgm/PQpxQaoWyGUhnmv1AquvwQ=
-git.kirsle.net/go/audio v0.0.0-20201121073642-65068820cbc0/go.mod h1:RD2Kyiy2lgayzQYmrh0S0/HLiq4XgAldt7MISCvtX5Y=
+git.kirsle.net/go/audio v0.0.0-20230310065553-fa6eb3d3a029/go.mod h1:RD2Kyiy2lgayzQYmrh0S0/HLiq4XgAldt7MISCvtX5Y=
 git.kirsle.net/go/log v0.0.0-20200902035305-70ac2848949b h1:TDxEEWOJqMzsu9JW8/QgmT1lgQ9WD2KWlb2lKN/Ql2o=
 git.kirsle.net/go/log v0.0.0-20200902035305-70ac2848949b/go.mod h1:jl+Qr58W3Op7OCxIYIT+b42jq8xFncJXzPufhrvza7Y=
-git.kirsle.net/go/render v0.0.0-20211231003948-9e640ab5c3da/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
 git.kirsle.net/go/render v0.0.0-20220505053906-129a24300dfa h1:Oa99SXkmFGnUNy+toPMQyW/eYotN1nZ9BWAThQ/huiM=
 git.kirsle.net/go/render v0.0.0-20220505053906-129a24300dfa/go.mod h1:ss7pvZbGWrMaDuZwyUTjV9+T0AJwAkxZZHwMFsvHrkk=
-git.kirsle.net/go/ui v0.0.0-20220409211920-3b653e503c5a h1:7pmqBcIfxOxCMCvnCS0XWM9NeXbzKTSQfiJc2IKJW+k=
+git.kirsle.net/go/ui v0.0.0-20230409041824-8716c479e90b h1:8+TSDXLE8Ts4xwqhGOZrqfDJYgMf4em0TqLfonf4t/E=
-git.kirsle.net/go/ui v0.0.0-20220409211920-3b653e503c5a/go.mod h1:cWD/tl2OUj0jWUQxW7BcapxiOFmnCPkrfzJt2tOiD1E=
+git.kirsle.net/go/ui v0.0.0-20230409041824-8716c479e90b/go.mod h1:LZejaASDPvZKdNv/cpvsYIWjJEE09up4ud8z20ULnfw=
-git.kirsle.net/go/ui v0.0.0-20221010004159-d82ef0b75165 h1:/IsRyl4lSsGr3i9IP71HFBQlIGKpwQaDiAlZIqw7bVo=
-git.kirsle.net/go/ui v0.0.0-20221010004159-d82ef0b75165/go.mod h1:cWD/tl2OUj0jWUQxW7BcapxiOFmnCPkrfzJt2tOiD1E=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/toml v1.1.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/aichaos/rivescript-go v0.3.1 h1:MvSssqWAU+oU3yfnanKpK5n+e0pLCA0MEELZE4VXV0g=
 github.com/aichaos/rivescript-go v0.3.1/go.mod h1:8qm1P1SThiwgbtmO+74QUMlV9HT4MSInWT8ivoO58LQ=
@@ -61,8 +58,14 @@ github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kB
 github.com/bketelsen/crypt v0.0.4/go.mod h1:aI6NrJ0pMGgvZKL1iVgXLnfIFJtfV+bKCoqOes/6LfM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/logex v1.2.0/go.mod h1:9+9sk7u7pGNWYMkh0hdiL++6OeibzJccyQU4p4MedaY=
+github.com/chzyer/logex v1.2.1/go.mod h1:JLbx6lG2kDbNRFnfkgvh4eRJRPX1QCoOIWomwysCBrQ=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/readline v1.5.0/go.mod h1:x22KAscuvRqlLoK9CsoYsmxoXZMMFVyOl86cAH8qUic=
+github.com/chzyer/readline v1.5.1/go.mod h1:Eh+b79XXUwfKfcPLepksvw2tcLE/Ct21YObkaSkeBlk=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/chzyer/test v0.0.0-20210722231415-061457976a23/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/chzyer/test v1.0.0/go.mod h1:2JlltgoNkt4TW/z9V/IzDdFaMTM2JPIi26O1pF38GC8=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
@@ -70,7 +73,6 @@ github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnht
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
-github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
@@ -78,17 +80,13 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
-github.com/dlclark/regexp2 v1.4.1-0.20201116162257-a2a8dda75c91 h1:Izz0+t1Z5nI16/II7vuEo/nHjodOg0p7+OiDpjX5t1E=
 github.com/dlclark/regexp2 v1.4.1-0.20201116162257-a2a8dda75c91/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
-github.com/dlclark/regexp2 v1.4.1-0.20220402034307-55964957c159 h1:76tGhMs2VcMihnjZxTZ64bC6HtSZdSoF+EYwd/Azryg=
-github.com/dlclark/regexp2 v1.4.1-0.20220402034307-55964957c159/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo=
 github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/dlclark/regexp2 v1.9.0 h1:pTK/l/3qYIKaRXuHnEnIf7Y5NxfRPfpb7dis6/gdlVI=
+github.com/dlclark/regexp2 v1.9.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/dop251/goja v0.0.0-20211022113120-dc8c55024d06/go.mod h1:R9ET47fwRVRPZnOGvHxxhuZcbrMCuiqOz3Rlrh4KSnk=
-github.com/dop251/goja v0.0.0-20220501172647-e1eca0b61fa9 h1:BXEAWJOT2C6ex9iOzVnrYWMFjTRccNs7p8fpLCLLcm0=
+github.com/dop251/goja v0.0.0-20230402114112-623f9dda9079 h1:xkbJGxVnk5sM8/LXeTKaBOfAZrI+iqvIPyH8oK1c6CQ=
-github.com/dop251/goja v0.0.0-20220501172647-e1eca0b61fa9/go.mod h1:TQJQ+ZNyFVvUtUEtCZxBhfWiH7RJqR3EivNmvD6Waik=
+github.com/dop251/goja v0.0.0-20230402114112-623f9dda9079/go.mod h1:QMWlm50DNe14hD7t24KEqZuUdC9sOTy8W6XbCU1mlw4=
-github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91 h1:1PfaQuGdeJVnHHQ0tg0Jw7MXagyqaAupJyk35/QM3I4=
-github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91/go.mod h1:yRkwfj0CBpOGre+TwBsqPV0IH0Pk73e4PXJOeNDboGs=
 github.com/dop251/goja_nodejs v0.0.0-20210225215109-d91c329300e7/go.mod h1:hn7BA7c8pLvoGndExHudxTDKZ84Pyvv+90pbBjbTz0Y=
 github.com/dop251/goja_nodejs v0.0.0-20211022123610-8dd9abb0616d/go.mod h1:DngW8aVqWbuLRMHItjPUyqdj+HWPvnQe8V8y1nDpIbM=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -102,8 +100,6 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/gen2brain/dlgs v0.0.0-20211108104213-bade24837f0b h1:M0/hjawi9ur15zpqL/h66ga87jlYA7iAuZ4HC6ak08k=
-github.com/gen2brain/dlgs v0.0.0-20211108104213-bade24837f0b/go.mod h1:/eFcjDXaU2THSOOqLxOPETIbHETnamk8FA/hMjhg/gU=
 github.com/gen2brain/dlgs v0.0.0-20220603100644-40c77870fa8d h1:dHYKX8CBAs1zSGXm3q3M15CLAEwPEkwrK1ed8FCo+Xo=
 github.com/gen2brain/dlgs v0.0.0-20220603100644-40c77870fa8d/go.mod h1:/eFcjDXaU2THSOOqLxOPETIbHETnamk8FA/hMjhg/gU=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
@@ -173,6 +169,9 @@ github.com/google/pprof v0.0.0-20201023163331-3e6fc7fc9c4c/go.mod h1:kpwsk12EmLe
 github.com/google/pprof v0.0.0-20201203190320-1bf35d6f28c2/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/pprof v0.0.0-20210122040257-d980be63207e/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/google/pprof v0.0.0-20230207041349-798e818bf904/go.mod h1:uglQLonpP8qtYCYyzA+8c/9qtqgA3qsXGYqCPKARAFg=
+github.com/google/pprof v0.0.0-20230406165453-00490a63f317 h1:hFhpt7CTmR3DX+b4R19ydQFtofxT0Sv3QsKNMVQYTMQ=
+github.com/google/pprof v0.0.0-20230406165453-00490a63f317/go.mod h1:79YE0hCXdHag9sBkw2o+N/YnZtTkXi0UT9Nnixa5eYk=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
@@ -206,6 +205,8 @@ github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/J
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/ianlancetaylor/demangle v0.0.0-20220319035150-800ac71e25c2/go.mod h1:aYm2/VgdVmcIU8iMfdMvDMsRAQjcfZSKFby6HOFvi/w=
+github.com/ianlancetaylor/demangle v0.0.0-20220517205856-0058ec4f073c/go.mod h1:aYm2/VgdVmcIU8iMfdMvDMsRAQjcfZSKFby6HOFvi/w=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
@@ -288,16 +289,12 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/tomnomnom/xtermcolor v0.0.0-20160428124646-b78803f00a7e h1:Ee+VZw13r9NTOMnwTPs6O5KZ0MJU54hsxu9FpZ4pQ10=
 github.com/tomnomnom/xtermcolor v0.0.0-20160428124646-b78803f00a7e/go.mod h1:fSIW/szJHsRts/4U8wlMPhs+YqJC+7NYR+Qqb1uJVpA=
-github.com/urfave/cli/v2 v2.6.0 h1:yj2Drkflh8X/zUrkWlWlUjZYHyWN7WMmpVxyxXIUyv8=
+github.com/urfave/cli/v2 v2.25.1 h1:zw8dSP7ghX0Gmm8vugrs6q9Ku0wzweqPyshy+syu9Gw=
-github.com/urfave/cli/v2 v2.6.0/go.mod h1:oDzoM7pVwz6wHn5ogWgFUU1s4VJayeQS+aEZDqXIEJs=
+github.com/urfave/cli/v2 v2.25.1/go.mod h1:GHupkWPMM0M/sj1a2b4wUrWBPzazNrIjouW6fmdJLxc=
-github.com/urfave/cli/v2 v2.19.2 h1:eXu5089gqqiDQKSnFW+H/FhjrxRGztwSxlTsVK7IuqQ=
-github.com/urfave/cli/v2 v2.19.2/go.mod h1:1CNUng3PtjQMtRzJO4FMXBQvkGtuYRxxiR9xMa7jMwI=
 github.com/veandco/go-sdl2 v0.4.1/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
-github.com/veandco/go-sdl2 v0.4.8/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
+github.com/veandco/go-sdl2 v0.4.33/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
-github.com/veandco/go-sdl2 v0.4.20 h1:/xEP4SBAcGCo++wKv90mxDDRlVPjZ9HpES82FTd6qkg=
+github.com/veandco/go-sdl2 v0.4.34 h1:dqbUhV/SSJ35grdYTLv3iVxtO1NzNmgzMV//hyCyypY=
-github.com/veandco/go-sdl2 v0.4.20/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
+github.com/veandco/go-sdl2 v0.4.34/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
-github.com/veandco/go-sdl2 v0.4.25 h1:J5ac3KKOccp/0xGJA1PaNYKPUcZm19IxhDGs8lJofPI=
-github.com/veandco/go-sdl2 v0.4.25/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -305,6 +302,7 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 go.etcd.io/etcd/api/v3 v3.5.0/go.mod h1:cbVKeC6lCfl7j/8jBhAK6aIYO9XOjdptoxU/nLQcPvs=
 go.etcd.io/etcd/client/pkg/v3 v3.5.0/go.mod h1:IJHfcCEKxYu1Os13ZdwCwIUTUVGYTSAM3YSwc9/Ac1g=
 go.etcd.io/etcd/client/v2 v2.305.0/go.mod h1:h9puh54ZTgAKtEbut2oe9P4L/oqKCVB6xsXlzd7alYQ=
@@ -326,10 +324,9 @@ golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20220507011949-2cf3adece122 h1:NvGWuYG8dkDHFSKksI1P9faiVJ9rayE6l0+ouWVIDs8=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20220507011949-2cf3adece122/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.8.0 h1:pd9TJtTueMTVQXzk8E2XESSMQDj/U7OUu0PqJqPXQjQ=
-golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2 h1:x8vtB3zMecnlqZIwJNUUpwYKYSqCz5jXbiyv0ZJJZeI=
+golang.org/x/crypto v0.8.0/go.mod h1:mRqEX+O9/h5TFCrQhkgjo2yKi0yYA+9ecGkdQoHrywE=
-golang.org/x/crypto v0.0.0-20221010152910-d6f0a8c073c2/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -343,11 +340,9 @@ golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMk
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
-golang.org/x/image v0.0.0-20211028202545-6944b10bf410/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
+golang.org/x/image v0.6.0/go.mod h1:MXLdDR43H7cDJq5GEGXEVeeNhPgi+YYEQ2pC1byI1x0=
-golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9 h1:LRtI4W37N+KFebI/qV0OFiLUv4GLOWeEW5hn/KEJvxE=
+golang.org/x/image v0.7.0 h1:gzS29xtG1J5ybQlv0PuyfE3nmc6R4qB73m6LUUmvFuw=
-golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
+golang.org/x/image v0.7.0/go.mod h1:nd/q4ef1AKKYl/4kft7g+6UyGbdiqWqTP1ZAbRoV7Rg=
-golang.org/x/image v0.0.0-20220902085622-e7cb96979f69 h1:Lj6HJGCSn5AjxRAH2+r35Mir4icalbqku+CLUtjnvXY=
-golang.org/x/image v0.0.0-20220902085622-e7cb96979f69/go.mod h1:doUCurBvlfPMKfmIpRIywoHmhN3VyhnoFDbvIEWF4hY=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -371,6 +366,8 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -410,7 +407,9 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v
 golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
-golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.9.0/go.mod h1:d48xBJpPfHeWQsugry2m+kC02ZBRGRgulfHnEXEuWns=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -434,6 +433,8 @@ golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@@ -483,15 +484,18 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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+golang.org/x/term v0.7.0/go.mod h1:P32HKFT3hSsZrRxla30E9HqToFYAQPCMs/zFMBUFqPY=
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 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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@@ -500,8 +504,12 @@ golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -558,6 +566,8 @@ golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
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 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

pkg/main_scene.go

@@ -34,14 +34,16 @@ type MainScene struct {
 	canvas    *uix.Canvas
 
 	// UI components.
-	labelTitle    *ui.Label
+	labelTitle     *ui.Label
-	labelSubtitle *ui.Label
+	labelSubtitle  *ui.Label
-	labelVersion  *ui.Label
+	labelVersion   *ui.Label
-	labelHint     *ui.Label
+	labelHint      *ui.Label
-	frame         *ui.Frame // Main button frame
+	frame          *ui.Frame // Main button frame
-	winRegister   *ui.Window
+	winRegister    *ui.Window
-	winSettings   *ui.Window
+	winSettings    *ui.Window
-	winLevelPacks *ui.Window
+	winLevelPacks  *ui.Window
+	winPlayLevel   *ui.Window
+	winOpenDrawing *ui.Window
 
 	// Update check variables.
 	updateButton *ui.Button
@@ -196,8 +198,10 @@ func (s *MainScene) Setup(d *Doodle) error {
 			Style: &balance.ButtonBabyBlue,
 		},
 		{
-			Name:  "Play a Level",
+			Name: "Play a Level",
-			Func:  d.GotoPlayMenu,
+			Func: func() {
+				s.showOpenDrawing(d, true)
+			},
 			Style: &balance.ButtonBabyBlue,
 		},
 		{
@@ -206,8 +210,10 @@ func (s *MainScene) Setup(d *Doodle) error {
 			Style: &balance.ButtonPink,
 		},
 		{
-			Name:  "Edit Drawing",
+			Name: "Edit Drawing",
-			Func:  d.GotoLoadMenu,
+			Func: func() {
+				s.showOpenDrawing(d, false)
+			},
 			Style: &balance.ButtonPink,
 		},
 		{
@@ -298,6 +304,52 @@ func (s *MainScene) Setup(d *Doodle) error {
 	return nil
 }
 
+// common function to show the "Open Drawing" window for the Play Level/Edit Drawing buttons.
+func (s *MainScene) showOpenDrawing(d *Doodle, forPlay bool) {
+	// Find or create the relevant window.
+	var window *ui.Window
+	if forPlay {
+		window = s.winPlayLevel
+		if window == nil {
+			window = windows.NewOpenDrawingWindow(windows.OpenDrawing{
+				Supervisor: s.Supervisor,
+				Engine:     shmem.CurrentRenderEngine,
+				LevelsOnly: true,
+				OnOpenDrawing: func(filename string) {
+					d.PlayLevel(filename)
+				},
+				OnCloseWindow: func() {
+					s.winPlayLevel.Destroy()
+					s.winPlayLevel = nil
+				},
+			})
+			s.winPlayLevel = window
+		}
+	} else {
+		window = s.winOpenDrawing
+		if window == nil {
+			window = windows.NewOpenDrawingWindow(windows.OpenDrawing{
+				Supervisor: s.Supervisor,
+				Engine:     shmem.CurrentRenderEngine,
+				OnOpenDrawing: func(filename string) {
+					d.EditFile(filename)
+				},
+				OnCloseWindow: func() {
+					s.winOpenDrawing.Destroy()
+					s.winOpenDrawing = nil
+				},
+			})
+			s.winOpenDrawing = window
+		}
+	}
+
+	window.MoveTo(render.Point{
+		X: (d.width / 2) - (window.Size().W / 2),
+		Y: (d.height / 2) - (window.Size().H / 2),
+	})
+	window.Show()
+}
+
 // setupAsync runs background tasks from setup, e.g. eager load
 // chunks of the level for cache.
 func (s *MainScene) setupAsync(d *Doodle) error {

pkg/sound/sound_sdl.go

@@ -1,4 +1,5 @@
-//+build !js,!wasm
+//go:build !js && !wasm
+// +build !js,!wasm
 
 package sound
 
@@ -99,11 +100,11 @@ func LoadSound(filename string) audio.Playable {
 	return &track
 }
 
-// PlaySound plays the named sound.
+// PlaySound plays the named sound. It will de-duplicate if the same sound is already playing.
 func PlaySound(filename string) {
 	log.Debug("Play sound: %s", filename)
 	sound := LoadSound(filename)
-	if sound != nil {
+	if sound != nil && !sound.Playing() {
 		sound.Play(1)
 	}
 }

pkg/uix/actor.go

@@ -25,9 +25,10 @@ import (
 //     as defined in the map: its spawn coordinate and configuration.
 //   - A uix.Canvas that can present the actor's graphics to the screen.
 type Actor struct {
-	Drawing *doodads.Drawing
+	Drawing     *doodads.Drawing
-	Actor   *level.Actor
+	Actor       *level.Actor
-	Canvas  *Canvas
+	Canvas      *Canvas
+	LevelCanvas *Canvas // the parent Canvas of the level we reside in
 
 	activeLayer int  // active drawing frame for display
 	flagDestroy bool // flag the actor for destruction
@@ -57,7 +58,6 @@ type Actor struct {
 
 	// Mutex.
 	muInventory sync.RWMutex
-	muData      sync.RWMutex
 }
 
 // NewActor sets up a uix.Actor.
@@ -157,6 +157,12 @@ func (a *Actor) IsWet() bool {
 	return a.wet
 }
 
+// IsOnScreen checks whether the actor's visual sprite box is on-screen in the level viewport.
+func (a *Actor) IsOnScreen() bool {
+	var result = a.Position().Inside(a.LevelCanvas.ViewportRelative())
+	return result
+}
+
 // SetWet updates the state of the actor's wet-ness.
 func (a *Actor) SetWet(v bool) {
 	a.wet = v

pkg/uix/canvas_actors.go

@@ -64,6 +64,7 @@ func (w *Canvas) InstallActors(actors level.ActorMap) error {
 		// position to the Point defined in the level data.
 		liveActor := NewActor(id, actor, doodad)
 		liveActor.Canvas.parent = w
+		liveActor.LevelCanvas = w
 		liveActor.MoveTo(actor.Point)
 
 		w.actors = append(w.actors, liveActor)
@@ -151,6 +152,7 @@ func (w *Canvas) InstallScripts() error {
 
 // AddActor injects additional actors into the canvas, such as a Player doodad.
 func (w *Canvas) AddActor(actor *Actor) error {
+	actor.LevelCanvas = w
 	w.actors = append(w.actors, actor)
 	return nil
 }

pkg/uix/magic-form/magic_form.go

@@ -118,13 +118,10 @@ func (form Form) Create(into *ui.Frame, fields []Field) {
 
 		// Pager row?
 		if row.Pager != nil {
-			row.Pager.Compute(form.Engine)
+			row.Pager.Supervise(form.Supervisor)
-			form.Supervisor.Add(row.Pager)
 			frame.Pack(row.Pager, ui.Pack{
-				Side:   ui.W,
+				Side: ui.W,
-				Expand: true,
 			})
-
 		}
 
 		// Buttons row?
@@ -284,7 +281,7 @@ func (form Form) Create(into *ui.Frame, fields []Field) {
 					}
 				})
 
-				picker.Center(shmem.CurrentRenderEngine.WindowSize())
+				picker.Center(form.Engine.WindowSize())
 				picker.Show()
 				return nil
 			})

pkg/uix/scripting.go

@@ -94,11 +94,8 @@ func (w *Canvas) MakeSelfAPI(actor *Actor) map[string]interface{} {
 		"Title":    actor.Doodad().Title,
 
 		// functions
-		"ID": actor.ID,
+		"ID":      actor.ID,
-		"Size": func() render.Rect {
+		"Size":    actor.Size,
-			var size = actor.Doodad().ChunkSize()
-			return render.NewRect(size, size)
-		},
 		"GetTag":  actor.Doodad().Tag,
 		"Options": actor.Options,
 		"GetOption": func(name string) interface{} {
@@ -117,6 +114,10 @@ func (w *Canvas) MakeSelfAPI(actor *Actor) map[string]interface{} {
 			actor.MoveBy(p)
 			actor.SetGrounded(false)
 		},
+		"IsOnScreen": actor.IsOnScreen,
+		// 	// TODO: passing this to actor.IsOnScreen didn't work?
+		// 	return actor.Position().Inside(actor.Canvas.ViewportRelative())
+		// },
 		"Grounded":        actor.Grounded,
 		"SetHitbox":       actor.SetHitbox,
 		"Hitbox":          actor.Hitbox,

pkg/windows/open_drawing.go

@@ -0,0 +1,156 @@
+package windows
+
+import (
+	"git.kirsle.net/SketchyMaze/doodle/pkg/balance"
+	"git.kirsle.net/SketchyMaze/doodle/pkg/log"
+	"git.kirsle.net/SketchyMaze/doodle/pkg/userdir"
+	"git.kirsle.net/go/render"
+	"git.kirsle.net/go/ui"
+)
+
+// OpenDrawing window lets the user open a drawing or play a user level.
+type OpenDrawing struct {
+	Supervisor *ui.Supervisor
+	Engine     render.Engine
+	LevelsOnly bool
+
+	// Callback functions.
+	OnOpenDrawing func(filename string)
+	OnCloseWindow func()
+
+	// Internal variables
+	window *ui.Window
+}
+
+// NewOpenDrawingWindow initializes the window.
+func NewOpenDrawingWindow(config OpenDrawing) *ui.Window {
+	// Default options.
+	var (
+		title = "Open a drawing"
+
+		// size of the popup window
+		width  = 320
+		height = 320
+	)
+
+	window := ui.NewWindow(title)
+	window.SetButtons(ui.CloseButton)
+	window.Configure(ui.Config{
+		Width:      width,
+		Height:     height,
+		Background: render.Grey,
+	})
+	config.window = window
+
+	frame := ui.NewFrame("Window Body Frame")
+	window.Pack(frame, ui.Pack{
+		Side:   ui.N,
+		Fill:   true,
+		Expand: true,
+	})
+
+	// Divide the Levels and Doodads into tabs.
+	tabs := ui.NewTabFrame("Tabs")
+	tabs.SetBackground(render.DarkGrey)
+	config.setupLevelTab(width, height, tabs)
+	if !config.LevelsOnly {
+		config.setupDoodadTab(width, height, tabs)
+	}
+	tabs.Supervise(config.Supervisor)
+
+	window.Pack(tabs, ui.Pack{
+		Side:   ui.N,
+		Expand: true,
+	})
+
+	// Close button.
+	if config.OnCloseWindow != nil {
+		closeBtn := ui.NewButton("Close Window", ui.NewLabel(ui.Label{
+			Text: "Close",
+			Font: balance.MenuFont,
+		}))
+		closeBtn.Handle(ui.Click, func(ed ui.EventData) error {
+			config.OnCloseWindow()
+			return nil
+		})
+		config.Supervisor.Add(closeBtn)
+		window.Place(closeBtn, ui.Place{
+			Bottom: 15,
+			Center: true,
+		})
+	}
+
+	window.Supervise(config.Supervisor)
+	window.Hide()
+	return window
+}
+
+func (config OpenDrawing) setupLevelTab(width, height int, tabs *ui.TabFrame) *ui.Frame {
+	frame := tabs.AddTab("Levels", ui.NewLabel(ui.Label{
+		Text: "My Levels",
+		Font: balance.TabFont,
+	}))
+
+	// Levels Listbox.
+	levelList := ui.NewListBox("Levels", ui.ListBox{})
+	levelList.Resize(render.NewRect(width-10, height-80))
+	frame.Pack(levelList, ui.Pack{
+		Side:   ui.N,
+		Expand: true,
+	})
+
+	levelList.Handle(ui.Change, func(ed ui.EventData) error {
+		filename, _ := ed.Value.(string)
+		log.Info("Clicked on: %s", filename)
+		if config.OnOpenDrawing != nil {
+			config.OnOpenDrawing(filename)
+		}
+		return nil
+	})
+
+	// Get the user's levels.
+	levels, _ := userdir.ListLevels()
+
+	for _, lvl := range levels {
+		levelList.AddLabel(lvl, lvl, func() {})
+	}
+
+	levelList.Supervise(config.Supervisor)
+
+	return frame
+}
+
+func (config OpenDrawing) setupDoodadTab(width, height int, tabs *ui.TabFrame) *ui.Frame {
+	frame := tabs.AddTab("Doodads", ui.NewLabel(ui.Label{
+		Text: "My Custom Doodads",
+		Font: balance.TabFont,
+	}))
+
+	// Doodads Listbox.
+	doodadList := ui.NewListBox("Doodads", ui.ListBox{})
+	doodadList.Resize(render.NewRect(width-10, height-80))
+	frame.Pack(doodadList, ui.Pack{
+		Side:   ui.N,
+		Expand: true,
+	})
+
+	doodadList.Handle(ui.Change, func(ed ui.EventData) error {
+		filename, _ := ed.Value.(string)
+		log.Info("Clicked on: %s", filename)
+		if config.OnOpenDrawing != nil {
+			config.OnOpenDrawing(filename)
+		}
+		return nil
+	})
+
+	// Get the user's doodads.
+	doodads, _ := userdir.ListDoodads()
+
+	for _, lvl := range doodads {
+		doodadList.AddLabel(lvl, lvl, func() {})
+	}
+
+	doodadList.Supervise(config.Supervisor)
+
+	return frame
+}

pkg/windows/open_level_editor.go

@@ -16,6 +16,12 @@ import (
 )
 
 // OpenLevelEditor is the "Open a Level to Edit It" window
+//
+// DEPRECATED: in favor of OpenDrawing which has a nicer listbox instead
+// of the ugly button grid of this window.
+//
+// You can invoke this old window by the shell commands
+// `$ d.GotoPlayMenu()` or `$ d.GotoLoadMenu()`
 type OpenLevelEditor struct {
 	Supervisor *ui.Supervisor
 	Engine     render.Engine

pkg/windows/publish_level.go

@@ -34,9 +34,9 @@ func NewPublishWindow(cfg Publish) *ui.Window {
 		windowWidth    = 380
 		windowHeight   = 220
 		page           = 1
-		perPage        = 4
+		perPage        = 3 // rows of `columns`
 		pages          = 1
-		maxPageButtons = 8
+		maxPageButtons = 12
 
 		// columns and sizes to draw the doodad list
 		columns   = 3
@@ -218,7 +218,7 @@ func NewPublishWindow(cfg Publish) *ui.Window {
 			Font: balance.UIFont,
 		},
 		// Pager is broken, Supervisor doesn't pick it up, TODO
-		/*{
+		{
 			Label: "Doodads currently used on this level:",
 			Font:  balance.LabelFont,
 		},
@@ -231,7 +231,7 @@ func NewPublishWindow(cfg Publish) *ui.Window {
 		},
 		{
 			Pager: pager,
-		},*/
+		},
 		{
 			Buttons: []magicform.Field{
 				{