78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
// 25 february 2014
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package ui
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import (
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"fmt"
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"io/ioutil"
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"syscall"
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"unsafe"
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)
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// #include "winapi_windows.h"
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import "C"
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// pretty much every constant here except _WM_USER is from commctrl.h, except where noted
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/*
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Windows requires a manifest file to enable Common Controls version 6.
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The only way to not require an external manifest is to synthesize the manifest ourselves.
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We can use the activation context API to load it at runtime.
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References:
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- http://stackoverflow.com/questions/4308503/how-to-enable-visual-styles-without-a-manifest
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- http://support.microsoft.com/kb/830033
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The activation context code itself is in comctl32_windows.c.
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*/
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func initCommonControls() (err error) {
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manifestfile, err := ioutil.TempFile("", "gouicomctl32v6manifest")
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if err != nil {
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return fmt.Errorf("error creating synthesized manifest file: %v", err)
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}
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_, err = manifestfile.Write(manifest)
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if err != nil {
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return fmt.Errorf("error writing synthesized manifest file: %v", err)
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}
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filename := manifestfile.Name()
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// we now have to close the file, otherwise ActivateActCtx() will complain that it's in use by another program
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// if ioutil.TempFile() ever changes so that the file is deleted when it is closed, this will need to change
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manifestfile.Close()
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var errmsg *C.char
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errcode := C.initCommonControls(C.LPCWSTR(unsafe.Pointer(syscall.StringToUTF16Ptr(filename))), &errmsg)
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if errcode != 0 || errmsg != nil {
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return fmt.Errorf("error actually initializing comctl32.dll: %s: %v", C.GoString(errmsg), syscall.Errno(errcode))
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}
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return nil
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}
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// Common Controls class names.
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const (
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// x (lowercase) prefix to avoid being caught by the constants generator
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x_PROGRESS_CLASS = "msctls_progress32"
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)
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var manifest = []byte(`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
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<assemblyIdentity
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version="1.0.0.0"
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processorArchitecture="*"
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name="CompanyName.ProductName.YourApplication"
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type="win32"
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/>
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<description>Your application description here.</description>
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<dependency>
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<dependentAssembly>
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<assemblyIdentity
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type="win32"
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name="Microsoft.Windows.Common-Controls"
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version="6.0.0.0"
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processorArchitecture="*"
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publicKeyToken="6595b64144ccf1df"
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language="*"
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/>
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</dependentAssembly>
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</dependency>
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</assembly>
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`)
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