I've been making a simple app in C++/wxWidgets that just has a catalog of Garfield comix from the Internet, without the annoying ads and offers. (Don't ask me how I got access to the PNG files of each comic in the first place, because my name already explains that)
Anyway, I'm trying to make a static text with a specific font (in my case, that would be Tahoma size 8. I'm going to make it bold but for sake of simplicity I haven't done it yet). I use the following line of code to import it from the Windows internal font catalog:
wxFont *CC_FONT_Tahoma_Bold(8, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false, wxT("Tahoma"), wxFONTENCODING_DEFAULT);
but whenever I try that it just fails and gives the following error message (I'm using mingw-w64 8.1.0 if that helps):
error: cannot convert 'wxFontEncoding' to 'wxFont*' in initialization
I have no idea what this means and I have tried to change the font encoding to every possible value, but still no progress. Also, I am creating the font in the App's OnInit function. I have also tried to put it in a different function. Please help.
Turns out, I just made a silly mistake. 🤣🤪
The real code I should have used is:
wxFont *CC_FONT_Tahoma_Bold = new wxFont(8, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false, wxT("Tahoma"), wxFONTENCODING_DEFAULT);
Related
Does anyone have experience with using resource for styles. I'm working on a program for which we created a custom Style. We saved it as .style and as .vsf. Because we don't want the user to see/change the style of the programm we want to include it in our resource file (.res) This is done as explained in next Link: Customizing and Creating VCL Styles Afterwards the created file (Tested with .style and .vsf) is placed in the Resourcefile as RC Data.
Thats the preparation, now what didn't work. (tWinMain)
TStyleManager::SetStyle(TStyleManager::LoadFromResource((unsigned int)HInstance, "StyleName", RT_RCDATA));
This also doesn't work:
TStyleManager::LoadFromResource((unsigned int)HInstance, "StyleName", RT_RCDATA);
TStyleManager::SetStyle("StyleName");
also not working
TStyleManager_TStyleServicesHandle MyStyle;
MyStyle = TStyleManager::LoadFromResource((unsigned int)HInstance, "StyleName", RT_RCDATA);
TStyleManager::SetStyle(MyStyle);
All three methodes resulting in the error message: Invalid Style-handle
Loading the same style from a file works:
TStyleManager::LoadFromFile(stylePath + "StyleName.vsf");
TStyleManager::SetStyle("StyleName");
I had the same problem in Delphi (DX10.3) and the following worked for me
Basically the same call of "TStyleManager::LoadFromResource", but without the specification of the optional parameter "RT_RCDATA".
MyStyle = TStyleManager::LoadFromResource((unsigned int)HInstance, "StyleName");
TStyleManager::SetStyle(MyStyle);
But then the resource type "VCLSTYLE" is necessary to load the style correctly. When adding the resource in the IDE, with [Project] > [Resources and Pics...] you can only specify RCDATA in the dialog, which is bad. But you can enter the resource type directly manual with the keyboard as "VCLSTYLE". The IDE remembers this setting and now the resource is available as the correct type. As said before, it works with Delphi 10.3, with the Builder it depends on one try.
Resource-type manual input in IDE dialog
Best regards, Matthias
I have read this blogpost http://www.ics.com/blog/qt-tips-and-tricks-part-1 and tried to enable plugin debugging as described.
I've put this line in my main.cpp:
qputenv(QT_DEBUG_PLUGINS, 1);
But if I try to compile I'm getting this error:
.../src/main.cpp:14: error: 'QT_DEBUG_PLUGINS' was not declared in this scope
qputenv(QT_DEBUG_PLUGINS, -1);
What is the problem here and how do I have to do it right?
qputenv("QT_DEBUG_PLUGINS", QByteArray("1"));
But I don't get any additional output.
I'm using Qt5.5.1 with QtCreator 3.6 under KUbuntu 15.10.
You're supposed to set env variable from outside your program, not from inside! It's very likely the plugin loading you're interested into already happened by the time you reach that line. Try putting it before creating a Q*Application object.
– peppe
That's it. It was definitely set before plugin loading, but it seems to be important to set it before creating Q*Application as you wrote. Thank you.
– avb
I am trying to make dynamically generated html 5 graphs show up in a webview in Blackberry 10 Cascades. I have confirmed the html5 that I have generated, draws the correct graphs. My problem is that when I try to implement this in the Blackberry 10 Cascades Beta 3 SDK (using the Blackberry 10 Dev Alpha Simulator), the webview that is supposed to show the graph, just looks like this:
Here is the code that leads to this error:
//html_ already contains the html-5 code to make the graph at this point in the code
//This is the file path to a local file that is actually accessable in the emulator
//and not just from Windows
//
QFile *chartFile = new QFile("app/native/assets/data/chart.html");
if (chartFile->open(QIODevice::WriteOnly)) {
chartFile->write(html_.toUtf8());
chartFile->flush();
chartFile->close();
}
if (chartFile) delete chartFile;
if (graphView_) {
graphView_->setHtml("");
graphView_->setUrl(QUrl::fromLocalFile("app/native/assets/data/chart.html"));
}
I checked the permissions of that file, put they are all Allow (777 permissions for those who know Unix style permissions).
I added access_internet to the bar-descriptor.xml, eventhough my app was already able to access remote sites, just to see if that would fix it, but it did not.
I've been searching around trying to find a solution to this problem, but I have not.
If anyone could help me out with this, it would be greatly appreciated.
-------------------------------------------------------
Update:
I changed the code to set the html directly, now I have this:
if (graphView_) {
graphView_->setHtml(html_, QUrl("app/native/assets/data/chart.html"));
}
But nothing shows. It seems I have the wrong relative path relative to my base url.
My base url is this: QUrl("app/native/assets/data/chart.html")
My relative paths all begin with: ./Highcharts/js/...
My relative paths are located under: app/native/assets/data/Highcharts/js
It seems to me that I this should work, but when I do this, I just a blank screen, as if it can not find my relative paths. So I don't know what's going on here either.
I found a solution that works. I'm using the first approach, not the updated approach, but instead of
graphView_->setUrl(QUrl("app/native/assets/data/chart.html"));
I'm using:
graphView_->setUrl(QUrl("local:///assets/data/chart.html"));
And I have left the rest of the code the same, and it works.
I recently made some minor changes within my c++-builder-project-settings to distribute a built application, however now some kind of initialisation seems to be missing.
Before I was using this (worked properly):
TPngImage *img=new TPngImage;
img->LoadFromFile(pfad);
Image1->Picture->Assign(img);
However, suddenly I get the error: access-violation... access to 0x0000000.
I checked and noticed that Image1->Picture is Null.
Image1 is of course a TImage-Object added per designer.
I'm using embarcaderos XE2 16 c++-Builder.
Is there a setting for this or could you tell me, what I have to do?
I thought of Image1->Picture=new TPicture(); already, but that is also Null...
It seems that it was my settings...
Somehow I messed some setting up.
I exported the settings of a new project, copied my include-paths, overwrote the settings with the exported one and inserted the includes.
Now everything works again.
I'm trying to set the text of a textfield using the Carbon API like this:
ControlID editId = {'EDIT', 3};
ControlRef ctrl;
GetControlByID(GetWindowRef(), &editId, &ctrl);
CFStringRef title = CFSTR("Test");
OSErr er = SetControlData(ctrl, kControlEntireControl, kControlEditTextTextTag, CFStringGetLength(title), title);
CFRelease(title);
I'm using the C++ code template of XCode, so GetWindowRef() is a call to the predefined TWindow class. The OSErr return value gives me noErr, but my textfield only contains garbage.
It doesn't matter if I set the attribute of my textfield to Unicode or not.
Any ideas what is wrong here?
What does the GetControlID(...) return? Is it noErr?
As a ControlRef is also a HIViewRef, you can also use the function:
HIViewSetText to set the text. This is documented to work with functions that accept kControlEditTextCFStringTag.
By the way, the line you wrote:
CFRelease(title);
Will cause problems. One should only release objects that have been made using functions that have Create or Copy in the API name. You'll want to read: "Introduction to Memory Management Programming Guide for Core Foundation" -- search in the Xcode documentation.
Finally this did the trick:
SetControlData(ctrl, kControlEditTextPart, kControlStaticTextCFStringTag, sizeof(title), &title);
Since this seems to be very old API, a better way seems to be:
HIViewSetText(ctrl, title);
Thx to Lyndsey for the hints.