Can I convert my VB code to C++? How can I do it?
This is my VB code:
Dim OpenFileDialog1 As New OpenFileDialog
With OpenFileDialog1
.CheckFileExists = True
.ShowReadOnly = False
.Filter = "All Files|*.*|Bitmap Files (*)|*.bmp;*.gif;*.jpg"
.FilterIndex = 2
If .ShowDialog = DialogResult.OK Then
' Load the specified file into a PictureBox control.
PictureBox1.Image = Image.FromFile(.FileName)
End If
End With
Well you can convert it to C++, and using a graphical library might be the easiest way to do so.
I recommend using Qt. It is a fairly simple graphical framework which works on several platforms. We currently don't know which platform you target, however I assume you're targeting Windows since you showed an example in Visual Basic.
Typically, using Qt classes QFileDialog and QPicture, you should be able to achieve your goal quite quick.
The framework is shipped with a whole set of simple examples. One of them is exactly what you ask.
Here is an MSDN-Example for an OpenFileDialog using the WinAPI.
Related
How do I implement a function to load a dll(aka framework) on Mac OS using C++?
void LoadFramework(const char* frameworkPath)
{
//frameworkPath is the absolute path of the framework
}
Edit:
When I google searched for this problem, I mostly ended up with dlopen solution to load the framework. What I am instead looking for is to use CFBundleCreate to load the framework. It seems to me that there are a bunch of methods needed to be called to construct an URL from const char * path. I found the needed code in pieces, and could not write one comprehensive solution.
It typically is just a few lines of straightforward code to open a framework in Mac, something along the lines of :
bundleURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
CFSTR("/System/Library/Frameworks/<your_framework_name.framework>"),
kCFURLPOSIXPathStyle, true);
bundle = CFBundleCreate(kCFAllocatorDefault, bundleURL);
assert(bundle != NULL);
and pretty much everything in that snippet is well documented. I would suggest adding more detail in the question, as to the specifics of what exactly is not working for you.
Why not do this?
using DLL_Namespace;
This should give you access to the DLL.
I supposed to using the cocos2dx + C++ to do the most job in application, and use lua to some ui part job.
And here is a question:
In bool AppDelegate::applicationDidFinishLaunching(): I using this codes to config the design screen size
glview->setDesignResolutionSize(designResolutionSize.width, designResolutionSize.height, ResolutionPolicy::NO_BORDER);
But what will happen if I change the config in config.lua.
CONFIG_SCREEN_ORIENTATION = "landscape"
-- design resolution
CONFIG_SCREEN_WIDTH = 960
CONFIG_SCREEN_HEIGHT = 640
-- auto scale mode
CONFIG_SCREEN_AUTOSCALE = "FIXED_HEIGHT"
Is there any solution can resolve the config issue if I am using c++ and lua?
Finally, after some test, I found a way to resolve it.
The c++ codes only work in the c++ enviroment, and the lua config only works in the lua enviroment, so we have to let the properties of them be same.
I want to create an excel file inside of my C++ project, I would use C# but because of other restraints I have to use C++.
When I go to create a new application like this:
#define excel Microsoft::Office::Interop::Excel
excel::Application^ exlFile = gcnew excel::Application;
it underlines excel::Application in red and say:
Cannot create an object of a CLI interface class
Am I doing something wrong, or is there no way to create a full application inside of C++/cli? If I am doing something wrong will you please let me know? If you need more information please let me know.
Using VS 2012
#using <Microsoft.Office.Interop.Excel.dll>
Try using Excel::Application^ xl = gcnew Excel::ApplicationClass() instead.
I'm looking for a simple example code for C++\IronPython integration, i.e. embedding python code inside a C++, or better yet, Visual C++ program.
The example code should include: how to share objects between the languages, how to call functions\methods back and forth etc...
Also, an explicit setup procedure would help too. (How to include the Python runtime dll in Visual Studio etc...)
I've found a nice example for C#\IronPython here, but couldn't find C++\IronPython example code.
UPDATE - I've written a more generic example (plus a link to a zip file containing the entire VS2008 project) as entry on my blog here.
Sorry, I am so late to the game, but here is how I have integrated IronPython into a C++/cli app in Visual Studio 2008 - .net 3.5. (actually mixed mode app with C/C++)
I write add-ons for a map making applicaiton written in Assembly. The API is exposed so that C/C++ add-ons can be written. I mix C/C++ with C++/cli. Some of the elements from this example are from the API (such as XPCALL and CmdEnd() - please just ignore them)
///////////////////////////////////////////////////////////////////////
void XPCALL PythonCmd2(int Result, int Result1, int Result2)
{
if(Result==X_OK)
{
try
{
String^ filename = gcnew String(txtFileName);
String^ path = Assembly::GetExecutingAssembly()->Location;
ScriptEngine^ engine = Python::CreateEngine();
ScriptScope^ scope = engine->CreateScope();
ScriptSource^ source = engine->CreateScriptSourceFromFile(String::Concat(Path::GetDirectoryName(path), "\\scripts\\", filename + ".py"));
scope->SetVariable("DrawingList", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingList::typeid));
scope->SetVariable("DrawingElement", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingElement::typeid));
scope->SetVariable("DrawingPath", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingPath::typeid));
scope->SetVariable("Node", DynamicHelpers::GetPythonTypeFromType(AddIn::Node::typeid));
source->Execute(scope);
}
catch(Exception ^e)
{
Console::WriteLine(e->ToString());
CmdEnd();
}
}
else
{
CmdEnd();
}
}
///////////////////////////////////////////////////////////////////////////////
As you can see, I expose to IronPython some objects (DrawingList, DrawingElement, DrawingPath & Node). These objects are C++/cli objects that I created to expose "things" to IronPython.
When the C++/cli source->Execute(scope) line is called, the only python line
to run is the DrawingList.RequestData.
RequestData takes a delegate and a data type.
When the C++/cli code is done, it calls the delegate pointing to the
function "diamond"
In the function diamond it retrieves the requested data with the call to
DrawingList.RequestedValue() The call to DrawingList.AddElement(dp) adds the
new element to the Applications visual Database.
And lastly the call to DrawingList.EndCommand() tells the FastCAD engine to
clean up and end the running of the plugin.
import clr
def diamond(Result1, Result2, Result3):
if(Result1 == 0):
dp = DrawingPath()
dp.drawingStuff.EntityColor = 2
dp.drawingStuff.SecondEntityColor = 2
n = DrawingList.RequestedValue()
dp.Nodes.Add(Node(n.X-50,n.Y+25))
dp.Nodes.Add(Node(n.X-25,n.Y+50))
dp.Nodes.Add(Node(n.X+25,n.Y+50))
dp.Nodes.Add(Node(n.X+50,n.Y+25))
dp.Nodes.Add(Node(n.X,n.Y-40))
DrawingList.AddElement(dp)
DrawingList.EndCommand()
DrawingList.RequestData(diamond, DrawingList.RequestType.PointType)
I hope this is what you were looking for.
If you don't need .NET functionality, you could rely on embedding Python instead of IronPython. See Python's documentation on Embedding Python in Another Application for more info and an example. If you don't mind being dependent on BOOST, you could try out its Python integration library.
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.