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⚠️ Libfredo 15.4b | Minor release with bugfixes and improvements Update

Window handle from process

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  • A Offline
    Alienizer
    last edited by 2 Aug 2011, 00:53

    getWindow                = Win32API.new('user32.dll', 'GetWindow', 'li', 'l')
    getTopWindow             = Win32API.new('user32.dll', 'GetTopWindow', 'l', 'l')
    getWindowThreadProcessId = Win32API.new('user32.dll', 'GetWindowThreadProcessId', 'lp', 'l')
    getCurrentThreadId       = Win32API.new("kernel32.dll", "GetCurrentThreadId", '', 'L')
    
    tid = getCurrentThreadId.call
    wnd = getTopWindow.call(0)
    pid = 0.chr * 4
    while wnd != 0
    	getWindowThreadProcessId.call(wnd, pid)
    	pidnum = pid.unpack('L').first
    	if pidnum == tid
    		UI.messagebox(wnd.to_s)
    		break
    	end
    	wnd = getWindow.call(wnd, 2)
    end
    

    I'm trying to get the Sketchup window handle, and my code above never gets to display the handle! Looks right to me, but I have no idea why it isn't working. Any ideas?

    I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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    • T Offline
      thomthom
      last edited by 2 Aug 2011, 15:16

      Have a look at this thread: http://forums.sketchucation.com/viewtopic.php?f=180&t=33756&p=296865#p296865

      Note I posted one simple method that works only if the SketchUp window has focus, and one that should work regardless.

      Thomas Thomassen — SketchUp Monkey & Coding addict
      List of my plugins and link to the CookieWare fund

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      • A Offline
        Alienizer
        last edited by 2 Aug 2011, 15:40

        Yes I did look at your post first, but I got mixed results, sometimes SK just unload from memory, and sometimes the handle was nil. So I wanted to created one without a callback, hence my code above. I'm just not sure what the bug is.

        I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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        • A Offline
          Alienizer
          last edited by 2 Aug 2011, 15:44

          model_path = Sketchup.active_model.path
          if (model_path.empty?)
           	model_name = "Untitled"
          else
            model_name = File.basename(model_path)
          end
          if (Sketchup.app_name == "Google SketchUp Pro")
            sketchup_title = model_name + " - SketchUp Pro"
          else
            sketchup_title = model_name + " - SketchUp"
          end
          findWindow = Win32API.new("user32.dll", "FindWindow", ['P','P'], 'N')
          window_id = findWindow.call(0, sketchup_title)
          
          

          Here's another way that works, but it's based on the title. I'd rather have my first one working instead, or your's if SK doesn't crash.

          Have you tried my first one see what you get? Do you see what's wrong with it?

          I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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          • T Offline
            thomthom
            last edited by 2 Aug 2011, 15:44

            Did you try using GetAncestor.call(handle, GA_ROOTOWNER) to ensure you get the root SketchUp window which is the owner of all SU's window? Your code might be getting a child window...

            Thomas Thomassen — SketchUp Monkey & Coding addict
            List of my plugins and link to the CookieWare fund

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            • T Offline
              thomthom
              last edited by 2 Aug 2011, 15:45

              @alienizer said:

              model_path = Sketchup.active_model.path
              > if (model_path.empty?)
              >  	model_name = "Untitled"
              > else
              >   model_name = File.basename(model_path)
              > end
              > if (Sketchup.app_name == "Google SketchUp Pro")
              >   sketchup_title = model_name + " - SketchUp Pro"
              > else
              >   sketchup_title = model_name + " - SketchUp"
              > end
              > findWindow = Win32API.new("user32.dll", "FindWindow", ['P','P'], 'N')
              > window_id = findWindow.call(0, sketchup_title)
              > 
              

              Here's another way that works, but it's based on the title. I'd rather have my first one working instead, or your's if SK doesn't crash.

              Have you tried my first one see what you get? Do you see what's wrong with it?

              What if the user has multiple windows open with the same title? Multiple unsaved models etc?

              Thomas Thomassen — SketchUp Monkey & Coding addict
              List of my plugins and link to the CookieWare fund

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              • T Offline
                thomthom
                last edited by 2 Aug 2011, 15:46

                @alienizer said:

                sometimes SK just unload from memory.

                @alienizer said:

                or your's if SK doesn't crash.

                You experienced crashes?

                Thomas Thomassen — SketchUp Monkey & Coding addict
                List of my plugins and link to the CookieWare fund

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                • A Offline
                  Alienizer
                  last edited by 2 Aug 2011, 16:21

                  @thomthom said:

                  Did you try using GetAncestor.call(handle, GA_ROOTOWNER) to ensure you get the root SketchUp window which is the owner of all SU's window? Your code might be getting a child window...

                  No I didn't, because my code never return a handle to begin with! It does iterate all windows, so it should pickup the pid, that's why I'm asking for help!

                  I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                  • A Offline
                    Alienizer
                    last edited by 2 Aug 2011, 16:22

                    @thomthom said:

                    What if the user has multiple windows open with the same title? Multiple unsaved models etc?

                    I know, that's why I don't want to use it and want my first code to work!

                    I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                    • A Offline
                      Alienizer
                      last edited by 2 Aug 2011, 16:25

                      @thomthom said:

                      You experienced crashes?

                      Yes, and it seems to have something to do with toolbars from 3rd party. When I have all of them visible (about 30 of them), your code runs for about 10 secs then SK unload from memory!

                      I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                      • Dan RathbunD Offline
                        Dan Rathbun
                        last edited by 2 Aug 2011, 17:18

                        From Ruby you can get process id, like:
                        $$
                        or
                        Process.pid

                        I'm not here much anymore.

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                        • A Offline
                          Alienizer
                          last edited by 2 Aug 2011, 18:41

                          @dan rathbun said:

                          From Ruby you can get process id, like:
                          $$
                          or
                          Process.pid

                          That worked 👍 I should have used GetCurrentProcessId instead of GetCurrentThreadId 😒 but your way is much simpler. Thanks!

                          I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                          • Dan RathbunD Offline
                            Dan Rathbun
                            last edited by 3 Aug 2011, 02:44

                            Using "Untitled" as a substring only works in English editions.

                            In other editions it's bound to be a unicode string.

                            The Win32 Resource ID in the sketchup.exe String Table is 61443 (in case you like using a LoadString system call.)

                            I'm not here much anymore.

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                            • A Offline
                              Alienizer
                              last edited by 3 Aug 2011, 03:20

                              @dan rathbun said:

                              Using "Untitled" as a substring only works in English editions.

                              True!

                              @dan rathbun said:

                              The Win32 Resource ID in the sketchup.exe String Table is 61443 (in case you like using a LoadString system call.)

                              Thanks.

                              But I don't think my approach or that of thomthom to get the SKP window works. If you use Process.pid and enum the windows until you find the right one, and use GetWindowText WinAPI to get the title of the SKP window, it works, but not always. I have a shortcut to SKP in one of my folder and it works to get the title, but if I use the Windows Start menu to run SKP, the title is blank, so it's not getting the proper window as expected. And since the return text is blank, we can't tell which window it is!

                              So try it using the following...

                              wnd = getAncestor.call(wnd, 3)
                              buf = "\0" * 260
                              getWindowText.call(wnd, buf, 256)
                              UI.messagebox(buf.strip)
                              
                              

                              or the complete code...

                              getTopWindow = Win32API.new('user32.dll', 'GetTopWindow', 'l', 'l')
                              getWindow = Win32API.new('user32.dll', 'GetWindow', 'li', 'l')
                              getWindowThreadProcessId = Win32API.new('user32.dll', 'GetWindowThreadProcessId', 'lp', 'l')
                              getWindowText = Win32API.new('user32', 'GetWindowText', 'LPI', 'I')
                              getAncestor = Win32API.new('user32', 'GetAncestor', 'LI', 'L')
                              
                              tid = Process.pid
                              wnd = getTopWindow.call(0)
                              pid = 0.chr * 4
                              while wnd != 0
                                 getWindowThreadProcessId.call(wnd, pid)
                                 pidnum = pid.unpack('L').first
                                 if pidnum == tid
                              			wnd = getAncestor.call(wnd, 3)
                              			buf = "\0" * 260
                              			getWindowText.call(wnd, buf, 256)
                              			UI.messagebox(buf.strip)
                                    break
                                 end
                                 wnd = getWindow.call(wnd, 2)
                              end
                              
                              

                              I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                              • A Offline
                                Alienizer
                                last edited by 3 Aug 2011, 03:51

                                I found the answer to my own problem! I was running the code inside my class

                                I don't know why it makes a difference!

                                I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                                • Dan RathbunD Offline
                                  Dan Rathbun
                                  last edited by 3 Aug 2011, 05:07

                                  You should always be running your wrapped within a module.

                                  The problem with TopWindow is that if a user has wxSU installed, the Sketchup window will be wrapped in a WX::Frame, and wxSU resets the Sketchup app window to have the invisible frame as it's parent.

                                  There are other quirky title things. If a user double clicks a SKP file to start Sketchup, the Title will not have "Untitled" (in the local language,) but could have a filename with unicode characters, and if it's Sketchup Pro, there's a bug where it does not have the "Pro" part until after it finishes processing the Plugins and Tools folders, and draws to UI (toolbars and menus.)

                                  I rejected this window title approach as too problematic:

                                  
                                    #  find_skp_hwnd_by_title(debug=false)
                                    #
                                    #  Try to find app window by title.
                                    #
                                    #  Highly modified from wxSU code.
                                    #
                                    def find_skp_hwnd_by_title(debug=false)
                                    
                                      require('Win32API.so')
                                    
                                      skp_window_id = 0
                                      
                                      findWindow = Win32API.new("user32.dll", "FindWindow", ['P','P'], 'N')
                                  
                                      # Set locale specific "Untitled" string Hash
                                      #
                                      # ** this won't work as is because some strings are unicode
                                      #
                                      notitle = Hash.new("Untitled")
                                      
                                      notitle['cs'] = "Názvu"           # Czech 
                                      notitle['de'] = "Unbenannt"       # German
                                      notitle['en'] = "Untitled"        # English
                                      notitle['en-US'] = "Untitled"     # English
                                      notitle['es'] = "Sin título"      # Spanish
                                      notitle['fr'] = "Sans titre"      # French
                                      notitle['it'] = "Senza titolo"    # Italian
                                      notitle['nl'] = "Titelloze"       # Dutch 
                                      notitle['pl'] = "Niezatytulowane" # Polish
                                      notitle['pt-BR'] = "Sem título"   # Portuguese-Brazil
                                      notitle['pt'] = "Sem título"      # Portuguese
                                      notitle['tr'] = "Basliksiz"       # Turkish 
                                      
                                  
                                      # These strings are reportedly not translated
                                      sketchup_free = "SketchUp"
                                      sketchup_pro = "SketchUp Pro"
                                      no_license = "[LICENSE UNAVAILABLE]"
                                  
                                      # Find the SketchUp main window handle by its window title
                                      model_path = Sketchup.active_model.path
                                      if (model_path.empty?)
                                        model_name = notitle[ Sketchup.get_locale ]
                                  
                                        if (Sketchup.app_name == "Google SketchUp")
                                          sketchup_title = model_name + " - " + sketchup_free
                                        else
                                          sketchup_title = model_name + " - " + sketchup_pro
                                        end
                                      else
                                        # For some reason, when starting SketchUp Pro by double-clicking an SKP 
                                        #   file, the window title says SketchUp until after load is complete.
                                        model_name = File.basename(model_path)
                                        sketchup_title = model_name + " - " + sketchup_free
                                      end
                                  
                                      skp_window_id = findWindow.call(0, sketchup_title)
                                  
                                      if debug && skp_window_id == 0
                                        msg = "Sketchup Window could NOT be found with title;\n #{sketchup_title}"
                                        msg<< "\n\nWill search for No license version.\nClick OK to continue..."
                                        UI.messagebox(msg)
                                      else
                                        UI.messagebox("Sketchup Window found with title; #{sketchup_title}")
                                      end
                                  
                                      if (skp_window_id == 0)
                                        # Can't find the window, look for no license version
                                        skp_window_id = findWindow.call(0, sketchup_title + " " + no_license)
                                  
                                        if debug && skp_window_id == 0
                                          UI.messagebox("Sketchup Window could NOT be found with title; #{sketchup_title}")
                                        else
                                          UI.messagebox("Sketchup Window found with title; #{sketchup_title}")
                                        end
                                      
                                      end
                                      
                                      return skp_window_id
                                  
                                    end # def
                                  

                                  I'm not here much anymore.

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                                  • A Offline
                                    Alienizer
                                    last edited by 3 Aug 2011, 16:20

                                    I agree 100% with you.

                                    BTW, when SKP runs your rb scripts, is the rb script first compiled by the Ruby interpreter, or is it interpreted like the old DOS Basic? Or compiled to P-Code?

                                    I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                                    • Dan RathbunD Offline
                                      Dan Rathbun
                                      last edited by 3 Aug 2011, 18:00

                                      Well it's not called a "compiler" is it?

                                      I'm not here much anymore.

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                                      • A Offline
                                        Alienizer
                                        last edited by 3 Aug 2011, 18:38

                                        @dan rathbun said:

                                        Well it's not called a "compiler" is it?

                                        😆 No, but I doubt it interprets characaters by characters at run time, it would be too slow. It has to pre-compile or something.

                                        I'm from Mars and moved to Earth to alienize you. Unfortunately, I became humanized.

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                                        • Dan RathbunD Offline
                                          Dan Rathbun
                                          last edited by 3 Aug 2011, 18:54

                                          Well the actual Ruby Core modules, classes and methods, are themselves compiled C-functions.
                                          The interpreter just "gathers" the arguments from the plain text scripts, and makes the C calls in the background.

                                          If you have downloaded the Ruby C source... you can read the interpreter's source to get an idea of what's happening behind the scenes.

                                          I'm not here much anymore.

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