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aehimself

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Everything posted by aehimself

  1. aehimself

    How to "dim" a TabSheet?

    That is exactly what I am trying to achieve now. The problem I'm getting is why the TPanel's Self.Canvas.Draw(0, 0, _bitmap); works while Self.Canvas.Draw(0, 0, _bitmap, 128); draws only the top half of the panel... see Good point, thank you! Did not think about this!
  2. aehimself

    How to "dim" a TabSheet?

    I don't see why it is that important, but let's say you have a connection to a server on each tab. It can be a web page, RDP, or simply some data aware controls. Once the connection is broken, the tabsheed would go dimmed, with a clear message "Reconnecting" (and an abort button) would be shown. This is just one example. Or let's say each tab allows you to manipulate data like... financial records. One tab = one person. There is a button which calculates some averages but since it takes so long, it is being done in a background thread. Until the thread is running no data must be modified as it can cause incorrect results. So, the tab sheet goes dimmed, with a marquee progress bar and a "Please wait" text. Or, you have a chat application, like IRC. One tab = one channel. If you are kicked from a channel, the tab goes dimmed, saying "You have been kicked from the channel" and a button to close the tabsheet. The things dimmed are not important at that stage because they can not be used; let them be a MsTSCAX control, TWebBrowser, TDBEdit or just a TButton - this is "everything". Important stuff means everything that the tab wants you to know at this point, a message maybe with some controls to interact with. Hope this helps to clear the desired outcome 🙂
  3. aehimself

    How to "dim" a TabSheet?

    One more thing, this is not really going to work when resizing, as the parent of my dimmed control is the tabsheet (which I need the image of). When I take an image of the tabsheet while the dimmed panel is visible, it's image will be seen on the picture, slowly fading out everything in the process. I need to think think through.
  4. aehimself

    How to "dim" a TabSheet?

    I want to display a progress / warning indicator on a tabsheet which will block all actions to the components on the tabsheet... imagine like the UAC "popup". Everything in the background is dimmed as they are unavailable at the moment, only the important stuff (buttons, labels, etc) are shown with full visibility.
  5. aehimself

    How to "dim" a TabSheet?

    So, the "screenshot" and repaint dimmed works... almost. The bitmap is captured correctly (saved to a file, shows perfectly) but drawing it back causes some issues... I have a TPanel descendant, like... TDimPanel= Class(TPanel) protected Procedure Paint; Override; Procedure Resize; Override; End; Procedure TDimPanel.Resize; Var dc: HWND; Begin inherited; _bitmap.SetSize(0, 0); // Clear the bitmap _bitmap.SetSize(Self.Parent.Width, Self.Parent.Height); // Self.Parent.PaintTo(_bitmap.Canvas.Handle, 0, 0); // Does not capture everything, leaves some components out... dc := GetDC(Self.Parent.Handle); BitBlt(_bitmap.Canvas.Handle, 0, 0, _bitmap.Width, _bitmap.Height, dc, 0, 0, SRCCOPY); _bitmap.SaveToFile('C:\shot.bmp'); End; Procedure TDimPanel.Paint; Begin inherited; Self.Canvas.Draw(0, 0, _bitmap, 128); // Self.Canvas.Ellipse(0, Self.Height - 20, 20, Self.Height); End; But only the upper half of the bitmap is drawn on the panel, bottom half is empty. If ellipse drawing is uncommented, it shows up properly. The funny thing is that if I use Self.Canvas.Draw(0, 0, _bitmap); all is drawn perfectly, but I loose opacity... I guess it will have something to do in how the bitmap is set up...? At the moment I have the following in the constructor: _bitmap := Vcl.Graphics.TBitMap.Create; _bitmap.Transparent := False; _bitmap.PixelFormat := pf32bit; Moving the code out of my project to a TForm and using it's canvas to paint the bitmap to has the same behaviour. Any help is greatly appreciated, these imaging-things are way out of my league.
  6. aehimself

    How to "dim" a TabSheet?

    I was afraid so. I got WinErrors when I tried to do so. While the bitmap screenshot idea will work, it feels really hacky. Makes me a bit more comfortable that others got to the same idea to this problem, though. It's just a little bit strange that "dimming" is this complicated to achieve. Thanks anyway, I'll start with the bitmap idea 🙂
  7. aehimself

    How to "dim" a TabSheet?

    ...one small question, though. Is it possible to make the panel transparent, but not the components on it?
  8. aehimself

    How to "dim" a TabSheet?

    NICE!!!! And it even works with VCL Styles. Thank you, @Renate Schaaf!
  9. aehimself

    TNotification — Customizing Caption on Windows 10?

    There is / was a similar thread you can check; maybe it helps? Embarcadero Toaster - Notification Window Caption in Win10 - VCL - Delphi-PRAXiS [en]
  10. aehimself

    Delphi 10.4 Portable

    You, sir... 🙂
  11. aehimself

    Delphi 10.4 Portable

    There is no portable version of Delphi available afaik, however I suppose if you copy all necessary files from a PC where you installed Delphi to an other, it might work. But, you have to read the EULA carefully though; I'm not sure if this kind of deployment is allowed. Why installing it is not an option? In my personal opinion a fresh reinstall is always cleaner, guaranteed to work than attempting to "force it to life".
  12. aehimself

    TTreeNode leak when VCL styles are active

    Hello all, I was trying to get my head around this for a while but I simply can not find the solution. In my project I have a frame which I create runtime on a TTabSheet. On this frame I have 2 TTreeView components. 1 is on the frame itself, the second one is on an inner tabsheet: Now, if the TreeView on the TabSheet has ANY items created if the application has a VCL style active, those items will not be freed up. I put a breakpoint in TTreeNode.Destroy and I can confirm that those are ONLY being called for nodes in the other TreeView. I even put TreeView2.Items.Clear in the frame's destructor, but as Owner.HandleAllocated is false at that stage, deleting all nodes never happen. So I put a breakpoint in the frame destructor and TTreeNode.Destroy, and the thing I quickly realized is that the nodes of the first TreeView are being freed before the destructor, because of a window message (TVN_DELETEITEMA or TVN_DELETEITEMW). This is actually deleting the nodes in Vcl.ComCtrls.pas : 11910. But, this message is sent only to the TreeView on the frame, not to the one in the PageControl. Again, only when VCL styles are active. I will try to send this message manually in the destructor (or explicitly deleting all nodes...?) to see if it solves my issue, but it bugs me to hell that I don't know what is happening. If I'd know where this message is sent, I could investigate why it is sent to / received by one TreeView only. Anyone has any ideas? Edit: Manually trying to delete nodes will fail, as TreeView.Items.Count shows 0 at the destructor already. Edit-edit: I have an event on the frame itself which is being called BEFORE the .Free is called upon the owning tabseet. If I move TreeView2.Items.Clear in that handler, the memory leak disappears. I guess it's an other quirk of the VCL styles but I'd still like to know the reason...
  13. When I saw the release notes on 10.4.2 and read that TEdgeBrowser now works with the GA Edge, I got excited. I thought it means you have Windows 10 installed with Edge and it works. Well, unfortunately it's not the case, What it means is that you no longer need the Canary edition, you simply can download the runtime from Microsoft's website. In all cases, you need WebView2.dll. It can come from GetIt, or you can download and extract the .NuGet package from Microsoft. You'll find the DLL under build\native folder. Next, download the WebView2 Runtime. Evergreen is the easiest, it downloads and keeps a system wide runtime up-to-date. If you choose this, you are set and ready, everything should work. If you choose the fixed version, things will be a bit different, as you have to tell TEdgeBrowser where to look for the files. Extract the fixed version, and simply add EdgeBrowser1.BrowserExecutableFolder := 'C:\Users\user\Downloads\Microsoft.WebView2.FixedVersionRuntime.89.0.774.54.x86'; before the .Navigate. All set, right? Nah. Embarcadero simply forgot about the TWebBrowser component, which can use Edge mode, but it does not publish this property - so normally it can only be used with Evergreen editions. Fortunately though, this can be fixed with the usual dirty hack: Type THackBrowser = Class(TWebBrowser); procedure TForm2.FormCreate(Sender: TObject); begin // EdgeBrowser1.BrowserExecutableFolder := 'C:\Users\user\Downloads\Microsoft.WebView2.FixedVersionRuntime.89.0.774.54.x86'; THackBrowser(WebBrowser1).GetEdgeInterface.BrowserExecutableFolder := 'C:\Users\user\Downloads\Microsoft.WebView2.FixedVersionRuntime.89.0.774.54.x86'; WebBrowser1.Navigate('https://www.whatismybrowser.com/'); end; Now, you can give your users the freedom. If they decide to download the Edge Runtime, your application will use Edge engine. If not, it still works in IE11 mode. Just don't forget to set FEATURE_BROWSER_EMULATION in the registry 🙂 Hope it helps others!
  14. I tried creating a batch file from within the service. It slept 5 seconds (so I can see the process start) called NET STOP, slept 5 seconds (giving time for the service to stop) and NET START. When I called this batch from within the service I remember seeing the process starting and ending when the service terminated. This is why I never used this method. As it works for others I am sure I did something wrong; unfortunately I don't have the code snipplet to debug now. @Lars Fosdal this looks promising, I'll make a dummy service app to test it 🙂
  15. aehimself

    Something is Killing my application

    I had this when I had a bug (memory corruption to be exact) in my logging mechanism. The program tried to log it's issue but crashed beforehand. Also, if you use 32 bit processes and your log file grows above 2 GB that can cause your executable to halt.
  16. aehimself

    How to get json array from string?

    Well, I have 2 ideas. 1 - use the HTTP status codes. 200 means all fine, it was inserted. 500 means an error happened, transaction was rolled back, resend is needed from the client. If you can not control the status codes, you can add a "status check API". After a 200 OK for inserting the record, the client can query the inserted IDs for verification. If I understand the question completely, that is. But, I never really worked with stuff like this so take this with a grain of salt. I always liked to control everything, so when it was needed I launched my own webserver via ICS. That way I could set return codes, headers, session cookies, and even send detailed answers in any format whenever I wanted to.
  17. Thank you all for the replies guys but I don't want to hijack OP's topic. The methods here seem to be "hacky" (to crash the service and let Windows to restart it - it's a tricky approach I have to admit, though!) or already tried (creating a batch file to sleep for 5 seconds, and issue the NET TOP/START commands. Issue is, as parent program stops, it stops the child processes and therefore the batch file execution too). I was curious if there is a trick to restart a service from within the service itself without the need of a loader, maintenance service - an other executable in general. As it is not that important for me at the moment I'll just keep my eyes open to see if such method was unearthed already.
  18. It's not related to the topic, but may I ask how you implemented the update mechanism? Without a "loader" (e.g. actual code is in a DLL, service only loads and executes the DLL,) I never managed to achieve this. I never figured out how to restart the service from within the service.
  19. aehimself

    How to get json array from string?

    Just two notices. If you will ever use Oracle and RetIDList will contain more than 1000 elements, the code will fail. I don't know if any other RDBMS has this limitation though. How trusted is the file? Taking a string value from somewhere and putting it in a SQL command exposes your application to injection attacks.
  20. aehimself

    Delphi 10.4.2 first impressions

    Can anyone who has 10.4.2 confirm (or just explain if I misundrestood) but TEdgeBrowser now works without the +200 MB download requirements if Windows has the Chromium-based Edge installed? New TEdgeBrowser Extensions The TEdgeBrowser VCL component introduced in 10.4 (a wrapper around the Windows 10 Chromium-based Edge WebView2 control) has been updated with support for the GA version of Microsoft's WebView2 control and its SDK. Besides better compatibility, the component now offers enhanced support for files cache management and the use of custom WebView2 versions.
  21. Hello, I have a method that hides, rearranges and resizes components based on some conditions runtime. All is working fine, but the question eventually arrived: is is possible to "reset" everything to it's original (design time) state? Instead of creating a list of all changed components (and it's properties) I'm wondering if it's possible to re-read and re-apply the .DFM settings to a number of selected components? A list would be easier, but the DFM streaming seems to be the "professional" way to do it. I guess I'll need a TReader for that but I have absolutelly no idea how that works 🙂
  22. aehimself

    TTreeNode leak when VCL styles are active

    This is interesting. I am also changing the style runtime, when the application starts. However at this stage the frame including the TreeView does not exist yet in my case so I'd say it's irrelevant.
  23. aehimself

    TTreeNode leak when VCL styles are active

    My issue is that I have 5-6 TreeViews in my application in different locations and only one seems to be affected. I don't know what is the difference, this is what I was attempting to debug in the first place. If I know more, I will be able to make a small test case.
  24. aehimself

    TTreeNode leak when VCL styles are active

    I had a guess about it, but since at me it is on a frame... but you are right, let me rephrase it to "moving Items.Clear to the owning component's BeforeDestruction event" to be more inclusive 🙂
  25. aehimself

    TTreeNode leak when VCL styles are active

    10.4.1 and 10.3 for sure, I don't know about the rest. I'll check if moving .Clear in BeforeDestruction of the frame helps. That could be a workaround for most of us.
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