HexCtrl icon indicating copy to clipboard operation
HexCtrl copied to clipboard

Published 20 hours ago • verified publisher icon jovibor
→

Metadata

Fully-featured Hex Control written in C++/MFC.

Hex Control, C++/MFC

Table of Contents

  • Introduction
  • Installation
    • Building From The Sources
    • Dynamic Link Library
    • Namespace
  • Creating
    • Classic Approach
    • In Dialog
  • Set The Data
  • Virtual Data Mode
  • Virtual Bookmarks
  • Custom Colors
  • Methods
    Expand
    • ClearData
    • Create
    • CreateDialogCtrl
    • Destroy
    • ExecuteCmd
    • GetActualWidth
    • GetBookmarks
    • GetCacheSize
    • GetCapacity
    • GetCaretPos
    • GetColors
    • GetData
    • GetDataSize
    • GetDateInfo
    • GetEncoding
    • GetFont
    • GetGroupMode
    • GetMenuHandle
    • GetPagesCount
    • GetPagePos
    • GetPageSize
    • GetSelection
    • GetUnprintableChar
    • GetWindowHandle
    • GoToOffset
    • HasSelection
    • HitTest
    • IsCmdAvail
    • IsCreated
    • IsDataSet
    • IsMutable
    • IsOffsetAsHex
    • IsOffsetVisible
    • IsVirtual
    • ModifyData
    • Redraw
    • SetCapacity
    • SetCaretPos
    • SetColors
    • SetConfig
    • SetData
    • SetDateInfo
    • SetEncoding
    • SetFont
    • SetGroupMode
    • SetMutable
    • SetOffsetMode
    • SetPageSize
    • SetVirtualBkm
    • SetRedraw
    • SetSelection
    • SetUnprintableChar
    • SetWheelRatio
    • ShowInfoBar
  • Structures
    Expand
    • HEXBKM
    • HEXBKMINFO
    • HEXCOLOR
    • HEXCOLORINFO
    • HEXCOLORS
    • HEXCREATE
    • HEXDATA
    • HEXDATAINFO
    • HEXHITTEST
    • HEXMENUINFO
    • HEXMODIFY
    • HEXSPAN
    • HEXVISION
  • Interfaces
    Expand
    • IHexBookmarks
    • IHexVirtColors
    • IHexVirtData
  • Enums
    Expand
    • EHexCmd
    • EHexDataSize
    • EHexModifyMode
    • EHexOperMode
    • EHexWnd
  • Notification Messages
    Expand
    • HEXCTRL_MSG_BKMCLICK
    • HEXCTRL_MSG_CARETCHANGE
    • HEXCTRL_MSG_CONTEXTMENU
    • HEXCTRL_MSG_DESTROY
    • HEXCTRL_MSG_MENUCLICK
    • HEXCTRL_MSG_SELECTION
    • HEXCTRL_MSG_SETDATA
  • Exported Functions
    Expand
    • CreateRawHexCtrl
    • GetHexCtrlInfo
    • HEXCTRLINFO
  • Positioning and Sizing
  • Appearance
  • Licensing

Introduction

HexCtrl is a very featured hex viewer/editor control written in C++ with the help of the MFC library.

It's implemented as a pure abstract interface and therefore can be used in your app even if you don't use MFC directly. It's written with /std:c++20 standard in Visual Studio 2019.

The main features of the HexCtrl:

  • View and edit data up to 16EB (exabyte)
  • Works in two data modes, Memory and Virtual Data Mode
  • Fully featured Bookmarks Manager
  • Fully featured Search and Replace
  • Changeable encoding for the text area
  • Many options to Copy/Paste to/from clipboard
  • Undo/Redo
  • Modify data with Filling and many predefined Operations options
  • Ability to visually divide data into pages
  • Print whole document/pages range/selection
  • Set individual colors for the data chunks with Custom Colors
  • Customizable look and appearance
  • Assignable keyboard shortcuts via external config file
  • Written with /std:c++20 standard conformance

Installation

The HexCtrl can be used in two different ways:

  • Building from the sources as a part of your project
  • Using as a .dll.

Building From The Sources

The building process is quite simple:

  1. Copy HexCtrl folder into your project's directory.
  2. Add all files from the HexCtrl folder into your project, except for
    HexCtrl/dep/rapidjson/rapidjson-amalgam.h (header-only lib).
  3. Add #include "HexCtrl/HexCtrl.h" where you suppose to use the HexCtrl.
  4. Declare HexCtrl's namespace: using namespace HEXCTRL;
  5. Declare IHexCtrlPtr member variable: IHexCtrlPtr myHex { CreateHexCtrl() };
  6. Create control instance.

If you want to build HexCtrl from the sources in non MFC app you will have to:

  1. Add support for Use MFC in a Shared DLL in your project settings.
  2. Uncomment the line //#define HEXCTRL_MANUAL_MFC_INIT in HexCtrl.h header file.

Dynamic Link Library

To use HexCtrl as the .dll do the following:

  1. Copy HexCtrl.h and HexCtrlDefs.h files into your project's folder.
  2. Copy HexCtrl.lib file into your project's folder, so that linker can see it.
  3. Put HexCtrl.dll file next to your .exe file.
  4. Add the following line where you suppose to use the control:
#define HEXCTRL_SHARED_DLL //You can alternatively uncomment this line in HexCtrl.h.
#include "HexCtrl.h"`
  1. Declare IHexCtrlPtr member variable: IHexCtrlPtr myHex { CreateHexCtrl() };
  2. Create control instance.

To build HexCtrl.dll and HexCtrl.lib use the DLL Project/DLL Project.vcxproj Visual Studio project file.

Remarks:

HexCtrl's .dll is built with MFC Static Linking. So even if you are to use it in your own MFC project, even with different MFC version, there should not be any interferences

Building HexCtrl with MFC Shared DLL turned out to be a little tricky. Even with the help of AFX_MANAGE_STATE(AfxGetStaticModuleState()) macro there always were MFC debug assertions, which origins quite hard to comprehend.

Namespace

HexCtrl uses its own namespace HEXCTRL.
So it's up to you, whether to use namespace prefix before declarations:

HEXCTRL::

or to define namespace globally, in the source file's beginning:

using namespace HEXCTRL;

Creating

Classic Approach

The Create method is the first method you call to create HexCtrl instance. It takes HEXCREATE struct as an argument which provides all necessary information for the creation process.
The HEXCREATE::dwStyle and HEXCREATE::dwExStyle are Window and Extended Window styles respectively, they will be passed to the HexCtrl's window creating function, set these styles according to your needs.
For all available creation options see the HEXCREATE struct description.

In Dialog

To use HexCtrl within Dialog you can, of course, create it with the Classic Approach, call Create method and provide all the necessary information.

But there is another option you can use:

  1. Put Custom Control from the Toolbox in Visual Studio dialog designer into your dialog template and make it desirable size.
  2. Go to the Properties of that control and in the Class field, within the Misc section, type: HexCtrl.
    Give the control appropriate ID of your choice (IDC_MY_HEX in this example).
    Also, here you can set the control's Dynamic Layout properties, so that control behaves appropriately when dialog is being resized.
  3. Declare IHexCtrlPtr member variable within your dialog class:
IHexCtrlPtr m_myHex { CreateHexCtrl() };
  1. Call CreateDialogCtrl method from your dialog's OnInitDialog method.
BOOL CMyDialog::OnInitDialog()
{
    CDialogEx::OnInitDialog();
    
    m_myHex->CreateDialogCtrl(IDC_MY_HEX, m_hWnd);
}

Set the Data

To set a data for the HexCtrl the SetData method is used.
The code below shows how to construct HexCtrl object and display first 0x1FF bytes of the current app's memory:

IHexCtrlPtr myHex { CreateHexCtrl() };

HEXCREATE hcs;
hcs.hWndParent = m_hWnd;
hcs.rect = {0, 0, 600, 400}; //Window rect.
myHex->Create(hcs);

HEXDATA hds;
hds.spnData = { reinterpret_cast<std::byte*>(GetModuleHandle(nullptr)), 0x1FF };
myHex->SetData(hds);

The next example shows how to display std::string's text as hex data:

std::string str = "My string";
HEXDATA hds;
hds.spnData = { reinterpret_cast<std::byte*>(str.data()), str.size() };
myHex->SetData(hds);

Virtual Data Mode

Besides the standard default mode, when HexCtrl just holds a pointer to some bytes in memory, it also has additional Virtual mode.
This mode can be quite useful, for instance in cases where you need to display a very large amount of data that can't fit in memory all at once.

If HEXDATA::pHexVirtData pointer is set then all the data routine will be done through it. This pointer is of IHexVirtData class type, which is a pure abstract base class. You have to derive your own class from it and implement all its public methods. Then provide a pointer to the created object of this derived class prior to call to SetData method, through the HEXDATA::pHexVirtData.

Virtual Bookmarks

HexCtrl has innate functional to work with any amount of bookmarked regions. These regions can be assigned with individual background and text colors and description.

But if you have big and complicated data logic and want to handle all these bookmarks yourself, you can do it with the help of the virtual bookmarks mode. In this mode all bookmark's burden is handled by yourself, by implementing the IHexBookmarks interface and providing pointer to this implementation to the HexCtrl by calling SetVirtualBkm method.

Custom Colors

If you'd like to colorize your data with custom bk/text colors, you have to resort to the IHexVirtColors interface help. Please see the interface description, it's very simple to use.

Methods

The HexCtrl has plenty of methods that you can use to customize its appearance, and to manage its behavior.

ClearData

void ClearData();

Clears data from the HexCtrl view, not touching data itself.

Create

bool Create(const HEXCREATE& hcs);

Main initialization method.
Takes HEXCREATE as argument. Returns true if created successfully, false otherwise.

CreateDialogCtrl

bool CreateDialogCtrl(UINT uCtrlID, HWND hwndDlg);

Creates HexCtrl from Custom Control dialog's template. Takes control's id, and dialog's window handle as arguments. See Creating section for more info.

Destroy

void Destroy();

Destroys the control.
You only invoke this method if you use a raw IHexCtrl pointer obtained by the call to CreateRawHexCtrl function. Otherwise don't use it.

Remarks
You usually don't need to call this method unless you use HexCtrl through the raw pointer obtained by CreateRawHexCtrl factory function. If you use HexCtrl in the standard way, through the IHexCtrlPtr pointer obtained by CreateHexCtrl function, this method will be called automatically.

ExecuteCmd

void ExecuteCmd(EHexCmd enCmd)const;

Executes one of the predefined commands of EHexCmd enum. All these commands are basically replicating control's inner menu.

GetActualWidth

int GetActualWidth()const;

Returns the width of the HexCtrl bounding rectangle, i.e. the width of the drawn working area.

GetBookmarks

auto GetBookmarks()const->IHexBookmarks*;

Returns pointer to the IHexBookmarks interface, which responds for the bookmarks machinery.

GetCacheSize

auto GetCacheSize()const->DWORD;

Returns current cache size set in HEXDATA.

GetCapacity

DWORD GetCapacity()const;

Returns current capacity.

GetCaretPos

ULONGLONG GetCaretPos()const;

Retrieves current caret position offset.

GetColors

auto GetColors()const->HEXCOLORS;

Returns current HEXCOLORS.

GetData

auto GetData(HEXSPAN hss)const->std::byte*;

Returns a pointer to a data offset no matter what mode the control works in.

Note that in the Virtual mode returned data size can not exceed current cache size, and therefore may be less than the size acquired.
In the default mode returned pointer is just an offset from the data pointer set in the SetData method.

GetDataSize

auto GetDataSize()const->ULONGLONG;

Returns currently set data size.

GetDateInfo

GetDateInfo()const->std::tuple<DWORD, wchar_t>;

Returns date format-ordering specifier, and date separator.

GetEncoding

int GetEncoding()const;

Get code page that is currently in use.

GetFont

void GetFont(LOGFONTW& lf);

Retrieves current font through lf arg.

GetGroupMode

auto GetGroupMode()const->EHexDataSize;

Retrieves current data grouping mode.

GetMenuHandle

HMENU GetMenuHandle()const;

Retrieves the HMENU handle of the control's context menu. You can use this handle to customize menu for your needs.

Control's internal menu uses menu IDs in range starting from 0x8001. So if you wish to add your own new menu, assign menu ID starting from 0x9000 to not interfere.

When user clicks custom menu, control sends WM_NOTIFY message to its parent window with LPARAM pointing to HEXMENUINFO with its hdr.code member set to HEXCTRL_MSG_MENUCLICK. wMenuID field will be holding ID of the menu clicked.

GetPagesCount

DWORD GetPageSize()const;

Get current count of pages set by SetPageSize.

GetPagePos

auto GetPagePos()->ULONGLONG const;

Get current page a cursor stays at.

GetPageSize

DWORD GetPageSize()const;

Get current page size set by SetPageSize.

GetSelection

auto GetSelection()const->std::vector<HEXSPAN>;

Returns std::vector with the offsets and sizes of the current selection.

GetUnprintableChar

wchar_t GetUnprintableChar()const;

Returns replacement char for unprintable characters.

GetWindowHandle

HWND GetWindowHandle(EHexWnd enWnd)const

Retrieves window handle for one of the HexCtrl's windows. Takes EHexWnd enum as an argument.

GoToOffset

void GoToOffset(ULONGLONG ullOffset, int iRelPos = 0)

Go to a given offset. The second argument iRelPos may take-in three different values:

  • -1 - offset will appear at the top line.
  •   0 - offset will appear at the middle.
  •   1 - offset will appear at the bottom line.

HasSelection

bool HasSelection()const;

Returns true if HexCtrl has any area selected.

HitTest

auto HitTest(POINT pt, bool fScreen = true)const->std::optional<HEXHITTEST>

Hit testing of given point in a screen fScreen = true, or client fScreen = false coordinates. In case of success returns HEXHITTEST structure.

IsCmdAvail

bool IsCmdAvail(EHexCmd enCmd)const;

Returns true if given command can be executed at the moment, false otherwise.

IsCreated

bool IsCreated()const;

Shows whether HexCtrl is created or not yet.

IsDataSet

bool IsDataSet()const;

Shows whether a data was set to HexCtrl or not

IsMutable

bool IsMutable()const;

Shows whether HexCtrl is currently in edit mode or not.

IsOffsetAsHex

bool IsOffsetAsHex()const;

Is "Offset" currently represented (shown) as Hex or as Decimal. It can be changed by double clicking at offset area.

IsOffsetVisible

HEXVISION IsOffsetVisible(ULONGLONG ullOffset)const;

Checks for offset visibility and returns HEXVISION as a result.

IsVirtual

bool IsVirtual()const;

Returns true if HexCtrl currently works in Virtual Data Mode.

ModifyData

void ModifyData(const HEXMODIFY& hms);

Modify data currently set in HexCtrl, see the HEXMODIFY struct for details.

Redraw

void Redraw();

Redraws main window.

SetCapacity

void SetCapacity(DWORD dwCapacity);

Sets HexCtrl's current capacity.

SetCaretPos

void SetCaretPos(ULONGLONG ullOffset, bool fHighLow = true, bool fRedraw = true);

Sets the caret to the given offset. The fHighLow flag shows which part of the hex chunk, low or high, a caret must be set to.

SetColors

void SetColors(const HEXCOLORS& clr);

Sets all the colors for the control. Takes HEXCOLORS as the argument.

SetConfig

bool SetConfig(std::wstring_view wstrPath);

Sets the path to a JSON config file with keybindings to use in HexCtrl, or empty path (L"") for default. This file is using EHexCmd enum values as keys and strings array as values:

{
    "CMD_DLG_SEARCH": [ "ctrl+f", "ctrl+h" ],
    "CMD_SEARCH_NEXT": [ "f3" ],
    "CMD_SEARCH_PREV": [ "shift+f3" ]
}

For default values see the IDR_HEXCTRL_JSON_KEYBIND.json file from the project sources.

SetData

void SetData(const HEXDATA& hds);

Main method to set a data to display in read-only or mutable modes. Takes HEXDATA as an argument.

SetDateInfo

void SetDateInfo(DWORD dwFormat, wchar_t wchSepar);

Sets date format-ordering specifier, along with date separator.

SetEncoding

void SetEncoding(int iCodePage);

Sets the code page for the HexCtrl's text area. Takes code page identifier as an argument, or -1 for default ASCII-only characters.

Note: Code page identifier must represent Single-byte Character Set. Multi-byte character sets are not currently supported.

SetFont

void SetFont(const LOGFONTW& lf);

Sets a new font for the HexCtrl. This font has to be monospaced.

SetGroupMode

void SetGroupMode(EHexDataSize enGroupMode);

Sets current data grouping mode. See EHexDataSize for more info.

SetMutable

void SetMutable(bool fEnable);

Enables or disables mutable mode. In mutable mode all the data can be modified.

SetOffsetMode

void SetOffsetMode(bool fHex);

Sets offset area being shown as Hex (fHex=true) or as Decimal (fHex=false).

SetPageSize

void SetPageSize(DWORD dwSize, const wchar_t* wstrName = L"Page");

Sets the size of the page to draw the divider line between. This size should be multiple to the current capacity size to take effect. The second argument sets the name to be displayed in the bottom info area of the HexCtrl ("Page", "Sector", etc...).
To remove the divider just set dwSize to 0.

SetVirtualBkm

void SetVirtualBkm(IHexBookmarks* pVirtBkm);

Sets a pointer for the Virtual Bookmarks mode, or disables this mode if nullptr is set.

SetRedraw

void SetRedraw(bool fRedraw);

Should the main HexCtrl window be redrawn or not. E.g. should the WM_PAINT message be handled or not.

SetSelection

void SetSelection(const std::vector<HEXSPAN>& vecSel, bool fRedraw = true, bool fHighlight = false);

Sets current selection or highlight in the selection, if fHighlight is true.

SetUnprintableChar

void SetUnprintableChar(wchar_t wch);

Sets replacement char for unprintable characters.

SetWheelRatio

void SetWheelRatio(double dbRatio)

Sets the ratio for how much to scroll with mouse-wheel.

ShowInfoBar

void ShowInfoBar(bool fShow);

Show/hide bottom Info bar.

Structures

Below are listed all HexCtrl's structures.

HEXBKM

Structure for bookmarks, used in BkmAdd method.

struct HEXBKM
{
    std::vector<HEXSPAN> vecSpan { };                //Vector of offsets and sizes.
    std::wstring         wstrDesc { };               //Bookmark description.
    ULONGLONG            ullID { };                  //Bookmark ID, assigned internally by framework.
    ULONGLONG            ullData { };                //User defined custom data.
    COLORREF             clrBk { RGB(240, 240, 0) }; //Bk color.
    COLORREF             clrText { RGB(0, 0, 0) };   //Text color.
};
using PHEXBKM = HEXBKM*;

The member vecSpan is of a std::vector<HEXSPAN> type because a bookmark may have few non adjacent areas. For instance, when selection is made as a block, with Alt pressed.

HEXBKMINFO

Bookmark information struct.

struct HEXBKMINFO
{
    NMHDR   hdr { };  //Standard Windows header.
    PHEXBKM pBkm { }; //Bookmark pointer.
};

HEXCOLOR

HexCtrl custom colors.

struct HEXCOLOR
{
    COLORREF clrBk { };   //Bk color.
    COLORREF clrText { }; //Text color.
};
using PHEXCOLOR = HEXCOLOR*;

HEXCOLORINFO

Struct for hex chunks' color information.

struct HEXCOLORINFO
{
    NMHDR     hdr { };       //Standard Windows header.
    ULONGLONG ullOffset { }; //Offset for the color.
    PHEXCOLOR pClr { };      //Pointer to the color struct.
};

HEXCOLORS

This structure describes all HexCtrl colors. All these colors have their default values.

struct HEXCOLORS
{
    COLORREF clrFontHex { GetSysColor(COLOR_WINDOWTEXT) };      //Hex-chunks font color.
    COLORREF clrFontText { GetSysColor(COLOR_WINDOWTEXT) };     //Text font color.
    COLORREF clrFontSel { GetSysColor(COLOR_HIGHLIGHTTEXT) };   //Selected hex/text font color.
    COLORREF clrFontDataInterp { RGB(250, 250, 250) };          //Data Interpreter text/hex font color.
    COLORREF clrFontCaption { RGB(0, 0, 180) };                 //Caption font color
    COLORREF clrFontInfoName { GetSysColor(COLOR_WINDOWTEXT) }; //Font color of the Info bar parameters.
    COLORREF clrFontInfoData { RGB(0, 0, 180) };                //Font color of the Info bar data.
    COLORREF clrFontCaret { RGB(255, 255, 255) };               //Caret font color.
    COLORREF clrBk { GetSysColor(COLOR_WINDOW) };               //Background color.
    COLORREF clrBkSel { GetSysColor(COLOR_HIGHLIGHT) };         //Background color of the selected Hex/ASCII.
    COLORREF clrBkDataInterp { RGB(147, 58, 22) };              //Data Interpreter Bk color.
    COLORREF clrBkInfoBar { GetSysColor(COLOR_BTNFACE) };       //Background color of the bottom Info bar.
    COLORREF clrBkCaret { RGB(0, 0, 255) };                     //Caret background color.
    COLORREF clrBkCaretSel { RGB(0, 0, 200) };                  //Caret background color in selection.
};

HEXCREATE

The main initialization struct used for HexCtrl creation.

struct HEXCREATE
{
    HEXCOLORS stColor { };          //All HexCtrl colors.
    HWND      hWndParent { };       //Parent window handle.
    PLOGFONTW pLogFont { };         //Monospaced font to be used, or nullptr for default.
    RECT      rect { };             //Initial window rect.
    UINT      uID { };              //Control ID if it's a child window.
    DWORD     dwStyle { };          //Window styles.
    DWORD     dwExStyle { };        //Extended window styles.
    double    dbWheelRatio { 1.0 }; //Ratio for how much to scroll with mouse-wheel.
    bool      fInfoBar { true };    //Show bottom Info bar or not.
    bool      fCustom { false };    //If it's a custom control in a dialog.
};

HEXDATA

Main struct to set a data to display in the control.

struct HEXDATA
{
    std::span<std::byte> spnData { };              //Data to display.
    IHexVirtData*        pHexVirtData { };         //Pointer for Virtual mode.
    IHexVirtColors*      pHexVirtColors { };       //Pointer for Custom Colors class.
    DWORD                dwCacheSize { 0x800000 }; //In Virtual mode max cached size of data to fetch.
    bool                 fMutable { false };       //Is data mutable (editable) or read-only.
    bool                 fHighLatency { false };   //Do not redraw window until scrolling completes.
};

HEXDATAINFO

Struct for a data information used in IHexVirtData.

struct HEXDATAINFO
{
    NMHDR                hdr { };       //Standard Windows header.
    HEXSPAN              stHexSpan { }; //Offset and size of the data bytes.
    std::span<std::byte> spnData { };   //Data span.
};

HEXHITTEST

Structure is used in HitTest method.

struct HEXHITTEST
{
    ULONGLONG ullOffset { };     //Offset.
    bool      fIsText { false }; //Is cursor at Text or Hex area.
    bool      fIsHigh { false }; //Is it High or Low part of the byte.
};

HEXMODIFY

This struct is used to represent data modification parameters.
When enModifyMode is set to EHexModifyMode::MODIFY_ONCE, bytes from pData just replace corresponding data bytes as is.
If enModifyMode is equal to EHexModifyMode::MODIFY_REPEAT then block by block replacement takes place few times.
For example, if:

  • SUM(vecSpan.ullSize) == 9
  • spnData.size() == 3
  • enModifyMode is set to EHexModifyMode::MODIFY_REPEAT
  • bytes in memory at vecSpan.ullOffset are 010203040506070809
  • bytes pointed to by spnData.data() are 030405

then, after modification, bytes at vecSpan.ullOffset will become 030405030405030405.

If enModifyMode is equal to EHexModifyMode::MODIFY_OPERATION then enOperMode comes into play, showing what kind of operation must be performed on data.

struct HEXMODIFY
{
    EHexModifyMode       enModifyMode { EHexModifyMode::MODIFY_ONCE }; //Modify mode.
    EHexOperMode         enOperMode { };       //Operation mode, used only in MODIFY_OPERATION mode.
    EHexDataSize         enDataSize { };       //Operation data size.
    std::span<std::byte> spnData { };          //Data span.
    std::vector<HEXSPAN> vecSpan { };          //Vector of data offsets and sizes.
    bool                 fBigEndian { false }; //Treat the data as a big endian, used only in MODIFY_OPERATION mode.
};

HEXMENUINFO

Menu information struct.

struct HEXMENUINFO
{
    NMHDR hdr { };     //Standard Windows header.
    POINT pt { };      //Mouse position when clicked.
    WORD  wMenuID { }; //Menu identifier.
};

HEXSPAN

This struct is used mostly in selection and bookmarking routines. It holds offset and size of the data region.

struct HEXSPAN
{
    ULONGLONG ullOffset { };
    ULONGLONG ullSize { };
};

HEXVISION

This struct is returned from IsOffsetVisible method. Two members i8Vert and i8Horz represent vertical and horizontal visibility respectively. These members can be in three different states:

  • -1 — offset is higher, or at the left, of the visible area.
  •   1 — offset is lower, or at the right.
  •   0 — offset is visible.
struct HEXVISION
{
    std::int8_t i8Vert { }; //Vertical offset.
    std::int8_t i8Horz { }; //Horizontal offset.
    operator bool() { return i8Vert == 0 && i8Horz == 0; }; //For test simplicity: if(IsOffsetVisible()).
};

Interfaces

IHexBookmarks

The IHexBookmarks interface responds for the HexCtrl's bookmarks machinery. To obtain pointer to this interface use the GetBookmarks method.

class IHexBookmarks
{
public:
    virtual ULONGLONG AddBkm(const HEXBKM& hbs, bool fRedraw = true) = 0;   //Add new bookmark, returns the new bookmark's ID.
    virtual void ClearAll() = 0;                                            //Clear all bookmarks.
    [[nodiscard]] virtual auto GetByID(ULONGLONG ullID)->PHEXBKM = 0;       //Get bookmark by ID.
    [[nodiscard]] virtual auto GetByIndex(ULONGLONG ullIndex)->PHEXBKM = 0; //Get bookmark by index.
    [[nodiscard]] virtual ULONGLONG GetCount() = 0;                         //Get bookmarks count.
    [[nodiscard]] virtual auto HitTest(ULONGLONG ullOffset)->PHEXBKM = 0;   //HitTest for given offset.
    virtual void RemoveByID(ULONGLONG ullID) = 0;                           //Remove bookmark by a given ID.
};

IHexBookmarks::AddBkm

ULONGLONG AddBkm(const HEXBKM& hbs, bool fRedraw = false)

Adds new bookmark to the control, returns created bookmark's ID.

Example:

HEXBKM hbs;
hbs.vecSpan.emplace_back(0x1, 10);
hbs.clrBk = RGB(0, 255, 0);
hbs.clrText = RGB(255, 255, 255);
hbs.wstrDesc = L"My bookmark, with green bk and white text.";
myHex->GetBookmarks()->Add(hbs);

IHexBookmarks::ClearAll

void ClearAll();

Clear all bookmarks.

IHexBookmarks::GetByID

GetByID(ULONGLONG ullID)->HEXBKM*;

Get bookmark by ID.

IHexBookmarks::GetByIndex

auto GetByIndex(ULONGLONG ullIndex)->HEXBKM*;

Get bookmark by index.

IHexBookmarks::GetCount

ULONGLONG GetCount();

Get bookmarks' count.

IHexBookmarks::HitTest

auto HitTest(ULONGLONG ullOffset)->HEXBKM*;

Test given offset and retrieves a pointer to HEXBKM if offset contains a bookmark.

IHexBookmarks::RemoveByID

void RemoveByID(ULONGLONG ullID);

Removes bookmark with the given ID.

IHexVirtColors

class IHexVirtColors
{
public:
    void OnHexGetColor(HEXCOLORINFO&) = 0;
};

This interface is used to set custom bk/text colors for the data regions.
To use this feature set the HEXDATA::pHexVirtColors member to a valid instance of your class implementing this interface, prior to calling the SetData method.

The OnHexGetColor method of this interface takes HEXCOLORINFO struct as an argument. The pClr member of this struct must point to a valid HEXCOLOR struct after method completes, or nullptr for default colors.

IHexVirtData

class IHexVirtData
{
public:
    virtual void OnHexGetData(HEXDATAINFO&) = 0;       //Data to get.
    virtual void OnHexSetData(const HEXDATAINFO&) = 0; //Data to set, if mutable.
};

Enums

EHexCmd

Enum of commands that can be executed within HexCtrl.

enum class EHexCmd : std::uint8_t
{
    CMD_DLG_SEARCH = 0x01, CMD_SEARCH_NEXT, CMD_SEARCH_PREV,
    CMD_NAV_DLG_GOTO, CMD_NAV_REPFWD, CMD_NAV_REPBKW, CMD_NAV_DATABEG, CMD_NAV_DATAEND,
    CMD_NAV_PAGEBEG, CMD_NAV_PAGEEND, CMD_NAV_LINEBEG, CMD_NAV_LINEEND,
    CMD_GROUPBY_BYTE, CMD_GROUPBY_WORD, CMD_GROUPBY_DWORD, CMD_GROUPBY_QWORD,
    CMD_BKM_ADD, CMD_BKM_REMOVE, CMD_BKM_NEXT, CMD_BKM_PREV, CMD_BKM_CLEARALL, CMD_BKM_DLG_MANAGER,
    CMD_CLPBRD_COPY_HEX, CMD_CLPBRD_COPY_HEXLE, CMD_CLPBRD_COPY_HEXFMT, CMD_CLPBRD_COPY_TEXTUTF16,
    CMD_CLPBRD_COPY_BASE64, CMD_CLPBRD_COPY_CARR, CMD_CLPBRD_COPY_GREPHEX, CMD_CLPBRD_COPY_PRNTSCRN,
    CMD_CLPBRD_COPY_OFFSET, CMD_CLPBRD_PASTE_HEX, CMD_CLPBRD_PASTE_TEXTUTF16, CMD_CLPBRD_PASTE_TEXTCP,
    CMD_MODIFY_DLG_OPERS, CMD_MODIFY_FILLZEROS, CMD_MODIFY_DLG_FILLDATA, CMD_MODIFY_UNDO, CMD_MODIFY_REDO,
    CMD_SEL_MARKSTART, CMD_SEL_MARKEND, CMD_SEL_ALL, CMD_SEL_ADDLEFT, CMD_SEL_ADDRIGHT, CMD_SEL_ADDUP, CMD_SEL_ADDDOWN,
    CMD_DLG_DATAINTERP, CMD_DLG_ENCODING, CMD_APPEAR_FONTCHOOSE, CMD_APPEAR_FONTINC, CMD_APPEAR_FONTDEC,
    CMD_APPEAR_CAPACINC, CMD_APPEAR_CAPACDEC, CMD_DLG_PRINT, CMD_DLG_ABOUT,
    CMD_CARET_LEFT, CMD_CARET_RIGHT, CMD_CARET_UP, CMD_CARET_DOWN,
    CMD_SCROLL_PAGEUP, CMD_SCROLL_PAGEDOWN
};

EHexDataSize

Data size to operate on, used in EHexModifyMode::MODIFY_OPERATION mode. Also used to set data grouping mode, in SetGroupMode method.

enum class EHexDataSize : std::uint8_t
{
    SIZE_BYTE = 0x01, SIZE_WORD = 0x02, SIZE_DWORD = 0x04, SIZE_QWORD = 0x08
};

EHexModifyMode

Enum of the data modification modes, used in HEXMODIFY.

enum class EHexModifyMode : std::uint8_t
{
    MODIFY_ONCE, MODIFY_REPEAT, MODIFY_OPERATION, MODIFY_RAND_MT19937, MODIFY_RAND_FAST
};

EHexOperMode

Enum of the data operation modes, used in HEXMODIFY when HEXMODIFY::enModifyMode is set to MODIFY_OPERATION.

enum class EHexOperMode : std::uint8_t
{
    OPER_ASSIGN, OPER_OR, OPER_XOR, OPER_AND, OPER_NOT, OPER_SHL, OPER_SHR, OPER_ROTL,
    OPER_ROTR, OPER_SWAP, OPER_ADD, OPER_SUB, OPER_MUL, OPER_DIV, OPER_CEIL, OPER_FLOOR
};

EHexWnd

Enum of all HexCtrl's internal windows. This enum is used as an arg in GetWindowHandle method to retrieve window's handle.

enum class EHexWnd : std::uint8_t
{
    WND_MAIN, DLG_BKMMANAGER, DLG_DATAINTERP, DLG_FILLDATA,
    DLG_OPERS, DLG_SEARCH, DLG_ENCODING, DLG_GOTO
};

Notification Messages

During its work HexCtrl sends notification messages to HEXCREATE::hwndParent window, about its different states, through WM_NOTIFY mechanism.
The LPARAM of the WM_NOTIFY message will contain a pointer to the NMHDR standard windows struct. Depending on the notification message LPARAM can then be casted to a pointer to another struct, see message description for details.

HEXCTRL_MSG_BKMCLICK

Sent if bookmark is clicked. LPARAM will contain pointer to a HEXBKMINFO struct.

HEXCTRL_MSG_CARETCHANGE

Sent when caret position has changed. LPARAM will contain pointer to a NMHDR struct.

HEXCTRL_MSG_CONTEXTMENU

Sent when context menu is about to be displayed. LPARAM will contain pointer to a HEXMENUINFO struct.

HEXCTRL_MSG_DESTROY

Sent to indicate that HexCtrl window is about to be destroyed. LPARAM will contain pointer to a NMHDR struct.

HEXCTRL_MSG_MENUCLICK

Sent when user defined custom menu has been clicked. LPARAM will contain pointer to a HEXMENUINFO struct.

HEXCTRL_MSG_SELECTION

Sent when selection has been made. LPARAM will contain pointer to a NMHDR struct.

HEXCTRL_MSG_SETDATA

Sent to indicate that the data has changed. LPARAM will contain pointer to a NMHDR struct.

Exported Functions

HexCtrl has few "C" interface functions which it exports when built as .dll.

CreateRawHexCtrl

extern "C" HEXCTRLAPI IHexCtrl* __cdecl CreateRawHexCtrl();

Main function that creates raw IHexCtrl interface pointer. You barely need to use this function in your code. Although if you do, you need to manually call the Destroy method afterwards.

GetHexCtrlInfo

extern "C" HEXCTRLAPI HEXCTRLINFO* __cdecl GetHexCtrlInfo();

Returns pointer to HEXCTRLINFO, which is the HexCtrl's service information structure.

HEXCTRLINFO

Service structure for HexCtrl's version information.

struct HEXCTRLINFO
{
    const wchar_t* pwszVersion { };        //WCHAR version string.
    union {
        unsigned long long ullVersion { }; //ULONGLONG version number.
        struct {
            short wMajor;
            short wMinor;
            short wMaintenance;
            short wRevision;
        }stVersion;
    };
};

Positioning and Sizing

To properly resize and position your HexCtrl's window you may have to handle WM_SIZE message in its parent window, in something like this way:

void CMyWnd::OnSize(UINT nType, int cx, int cy)
{
    //...
    ::SetWindowPos(m_myHex->GetWindowHandle(EHexWnd::WND_MAIN), this->m_hWnd, 0, 0, cx, cy, SWP_NOACTIVATE | SWP_NOZORDER);
}

Appearance

To change control's font size — Ctrl+MouseWheel
To change control's capacity — Ctrl+Shift+MouseWheel

Licensing

This software is available under "The HexCtrl License", it is free for any NON-COMMERCIAL use.
See the LICENSE file.

← Metadata

163
Stars
60
Forks
Watchers

Owner

verified publisher icon jovibor

Metadata

Fully-featured Hex Control written in C++/MFC.

Back