Skip to main content

gui construction - Problems with visual update in GUI


Consider the following. When clicking in "Browse" and then choosing a file, the path will remain the original one and won't change to the one of the file I chose:


nb = EvaluationNotebook[];

DynamicModule[
 {path1 = FileNameJoin[{$HomeDirectory, "Desktop", "file.nb"}],
  path2 = FileNameJoin[{$HomeDirectory, "Desktop", "file.xls"}]}, 

 CreateDialog[
  Column[{Row[{InputField[Dynamic[path1], String, Enabled -> False], 
      FileNameSetter[Dynamic[path1], 
       "Open", {"Mathematica Notebook" -> {"*.nb"}}]}], 
    Row[{InputField[Dynamic[path2], String, Enabled -> False], 
      FileNameSetter[Dynamic[path2], 
       "Open", {"Excel files" -> {"*.xls", "*.xlsx"}}]}]}], 
  NotebookEventActions :> {"WindowClose" :> (SetOptions[nb, 
       Visible -> True])}]
]


Answer



The behaviour is indeed inconsistent: CreateDialog uses the option WindowSize -> All, where All (god knows why) causes the unexpected behaviour with dynamic content. See resolution of the problem at the end of the post.


The following even more simple example clearly shows that something fishy is going on: only path2 can be set via the second button but not path1:


DynamicModule[{path1 = "path #1", path2 = "path #2"},
  CreateDialog@Grid@{
     {FileNameSetter[Dynamic@path1, 
       "Open", {"Mathematica Notebook" -> {"*.nb"}}], Dynamic@path1},
     {FileNameSetter[Dynamic@path2, 
       "Open", {"Excel files" -> {"*.xls", "*.xlsx"}}], Dynamic@path2}
     }];


Removing the CreateDialog wrapper causes both FileNameSetters to work as expected, which indicates that it is the special context of the dialog window that causes the erroneous behaviour. Since CreateDialog[expr] is just a specialized CreateWindow[DocumentNotebook[expr]], we have to look at the options CreateDialog uses as defaults for its internal CreateWindow. As it turns out, the blame lies with WindowSize. Compare the behavior of the following two examples where only the value of WindowSize differs.


This is faulty:


DynamicModule[{path1 = "path #1", path2 = "path #2"},
 CreateWindow[DocumentNotebook@Grid@{
     {FileNameSetter[Dynamic@path1, 
       "Open", {"Mathematica Notebook" -> {"*.nb"}}], Dynamic@path1},
     {FileNameSetter[Dynamic@path2, 
       "Open", {"Excel files" -> {"*.xls", "*.xlsx"}}], Dynamic@path2}
     }, WindowSize -> All]]


This works as expected:


DynamicModule[{path1 = "path #1", path2 = "path #2"},
 CreateWindow[DocumentNotebook@Grid@{
     {FileNameSetter[Dynamic@path1, 
       "Open", {"Mathematica Notebook" -> {"*.nb"}}], Dynamic@path1},
     {FileNameSetter[Dynamic@path2, 
       "Open", {"Excel files" -> {"*.xls", "*.xlsx"}}], Dynamic@path2}
     }, WindowSize -> {200, 200}]]


And then I remembered: Strange behavior of CreateDialog in (Dynamic)Module


The options for CreateWindow (to make it look like it is a dialog) are:


{WindowSize -> {200, 200}, Deployed -> True, ShowCellBracket -> False,
 WindowFloating -> False, StyleDefinitions -> "Dialog.nb",
 WindowFrame -> "ModelessDialog"}

Comments

Post a Comment

Popular posts from this blog

functions - Get leading series expansion term?

Given a function f[x] , I would like to have a function leadingSeries that returns just the leading term in the series around x=0 . For example: leadingSeries[(1/x + 2)/(4 + 1/x^2 + x)] x and leadingSeries[(1/x + 2 + (1 - 1/x^3)/4)/(4 + x)] -(1/(16 x^3)) Is there such a function in Mathematica? Or maybe one can implement it efficiently? EDIT I finally went with the following implementation, based on Carl Woll 's answer: lds[ex_,x_]:=( (ex/.x->(x+O[x]^2))/.SeriesData[U_,Z_,L_List,Mi_,Ma_,De_]:>SeriesData[U,Z,{L[[1]]},Mi,Mi+1,De]//Quiet//Normal) The advantage is, that this one also properly works with functions whose leading term is a constant: lds[Exp[x],x] 1 Answer Update 1 Updated to eliminate SeriesData and to not return additional terms Perhaps you could use: leadingSeries[expr_, x_] := Normal[expr /. x->(x+O[x]^2) /. a_List :> Take[a, 1]] Then for your examples: leadingSeries[(1/x + 2)/(4 + 1/x^2 + x), x] leadingSeries[Exp[x], x] leadingSeries[(1/x + 2 + (1 - 1/x...
Post a Comment
Read more

How to thread a list

I have data in format data = {{a1, a2}, {b1, b2}, {c1, c2}, {d1, d2}} Tableform: I want to thread it to : tdata = {{{a1, b1}, {a2, b2}}, {{a1, c1}, {a2, c2}}, {{a1, d1}, {a2, d2}}} Tableform: And I would like to do better then pseudofunction[n_] := Transpose[{data2[[1]], data2[[n]]}]; SetAttributes[pseudofunction, Listable]; Range[2, 4] // pseudofunction Here is my benchmark data, where data3 is normal sample of real data. data3 = Drop[ExcelWorkBook[[Column1 ;; Column4]], None, 1]; data2 = {a #, b #, c #, d #} & /@ Range[1, 10^5]; data = RandomReal[{0, 1}, {10^6, 4}]; Here is my benchmark code kptnw[list_] := Transpose[{Table[First@#, {Length@# - 1}], Rest@#}, {3, 1, 2}] &@list kptnw2[list_] := Transpose[{ConstantArray[First@#, Length@# - 1], Rest@#}, {3, 1, 2}] &@list OleksandrR[list_] := Flatten[Outer[List, List@First[list], Rest[list], 1], {{2}, {1, 4}}] paradox2[list_] := Partition[Riffle[list[[1]], #], 2] & /@ Drop[list, 1] RM[list_] := FoldList[Transpose[{First@li...
Post a Comment
Read more

front end - keyboard shortcut to invoke Insert new matrix

I frequently need to type in some matrices, and the menu command Insert > Table/Matrix > New... allows matrices with lines drawn between columns and rows, which is very helpful. I would like to make a keyboard shortcut for it, but cannot find the relevant frontend token command (4209405) for it. Since the FullForm[] and InputForm[] of matrices with lines drawn between rows and columns is the same as those without lines, it's hard to do this via 3rd party system-wide text expanders (e.g. autohotkey or atext on mac). How does one assign a keyboard shortcut for the menu item Insert > Table/Matrix > New... , preferably using only mathematica? Thanks! Answer In the MenuSetup.tr (for linux located in the $InstallationDirectory/SystemFiles/FrontEnd/TextResources/X/ directory), I changed the line MenuItem["&New...", "CreateGridBoxDialog"] to read MenuItem["&New...", "CreateGridBoxDialog", MenuKey["m", Modifiers-...
Post a Comment
Read more