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Splash Screen C++ Class without MFC or .NET

, 21 Apr 2009 CPOL
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A C++ class to generate a splash screen and about box from a bitmap and version string resources.

Introduction

Every application needs an “about box” and some need a “splash screen” while loading. Most developers use the boring “about dialog” that is created automatically. I created the class, CSplashScreen, to handle both, to make them less error prone and to make them more interesting. I use this class for programs from tiny dialog applets to complex applications that take a couple of minutes to load and initialize.

The class consists of two files, SplashScreen.h and SplashScreen.cpp. The class does not require MFC or .NET. I have another class that uses MFC.

The class gets all the information to display the splash screen from a bitmap and the version strings in the resources. Therefore, you don’t have to modify the splash screen every time the version changes.

The splash screen disappears when clicked on, a key is pressed, or the desired time has elapsed.

Splash Screen Example

Using the code

  • Include SplashScreen.h and SplashScreen.cpp.
  • Add version strings to the resources.
  • Add the IDB_SPLASH bitmap to the resources.
  • Add version.lib to the link libraries.

ShowSplashScreen(HWND pParentWnd, LPCTSTR statusMessage, int millisecondsToDisplay) can have zero to three parameters.

  • pParentWnd - parent window of splash screen
  • statusMessage - string to display in status area of splash screen
  • millisecondsToDisplay - number of milliseconds before hiding splash screen

To show the splash screen during initialization, add CSplashScreen::ShowSplashScreen();.

#include "SplashScreen.h"

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
    MSG msg;
    
    // display splash screen and have it turn off after 10 seconds
    CSplashScreen::ShowSplashScreen( hWnd, "http://applehome.com/", 10000);
  .
  .
  .
    while (GetMessage(&msg, NULL, 0, 0))  {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return msg.wParam;
}

To show the about box, add CSplashScreen::ShowSplashScreen() to WndProc(…):

#include "SplashScreen.h"

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message) {
    case WM_COMMAND:
        // Parse the menu selections:
        switch (LOWORD(wParam)) {
        case IDM_ABOUT:
            // display about box
            CSplashScreen::ShowSplashScreen( hWnd );
            break;
        }
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

Under the hood

Since I’m a consultant, I create a specialized bitmap for each client. I typically place the company logo and the application icon in the IDB_SPLASH bitmap. Depending on your artistic talent, you can make a very professional splash screen. The version strings are written on top of the bitmap.

There are 3 groupings of strings: Product Name, Body, and Status. The Body consists of one or more of the company name, version, copyright, and comment strings. I prefer the product name to be larger, with the multiple lines of the body smaller. I use Status only when the application is loading.

Each group has static variables that specify how the strings in that group are drawn:

  • m_xxxVerticalOffset - empty space between the top of the bitmap and the first string
  • m_xxxVerticalHeight - the maximum height of a group of strings
  • m_xxxLeftMargin - the distance from the left side to the place strings
  • m_xxxRightMargin - the distance from the right side to strings
  • m_xxxFontName - the name of the font for strings
  • m_xxxPointSize - the point size used for strings, (-1,-1) ==> Calculate point size
  • m_xxxTextColor - the color used for strings

The body can have from 0 to 4 strings. Set the static display variables:

  • m_displayCompanyName - true if displaying company name
  • m_displayVersion - true if displaying version
  • m_displayCopyright - true if displaying copyright
  • m_displayComments - true if displaying comments

The CSplashScreen class is instantiated when CSplashScreen::ShowSplashScreen() is called. It is deleted when the timeout elapses, a key is pressed, or the the mouse is clicked.

History

  • Date posted: April 21, 2009

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Chris Apple
Software Developer (Senior) Apple Enterprises - http://applehome.com/
United States United States
I have been a software consultant at Apple Enterprises, http://applehome.com/, since 1981, a paid programmer since 1975 and a programmer since 1969 when I took my first programming class at U.C. Berkeley. I graduated with an EECS degree in 1975 after a 2 year hiatus in the US Marine Corps as a infantry machine gunner.
 
I started working when the original Intel 8080 microprocessor was announced. My first product was a wire bonder that had four 8080 microprocessors controlling high speed motors. Lately I have been using the TI MSP430, NXP LPC2300 and the Renesas SH4 microcontrollers.
 
I write code in assembly, C, C++ and Java and occasionally design a board when needed. Most of the time the code is system level, low level and drivers, but I do write applications. Most embedded devices usually have a PC controller application that I write. The code is used in Windows, Windows CE and proprietary operating systems. I use Visual Studio 2008, IAR and Keil IDEs. I even create single click installations, especially complex ones that require third party installs.
 
I have developed over 50 products.
 
I host the UC Berkeley Engineering Alumni Society (South Bay):
http://www.linkedin.com/groups?gid=1851655
http://www.facebook.com/reqs.php#/group.php?gid=57293762711
 
I live in Silicon Valley, play full court basketball once a week, work out at the gym during the week and hike with my wife on the weekend.
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Comments and Discussions

 
BugVery nice!!! Does leak memory though... PinmemberAlhajiBello29-Sep-12 11:11 
BugSome bug PinmemberAlexey Voropaev11-May-12 2:53 
QuestionLoad time PinmemberChris Millward10-Mar-12 7:36 
AnswerRe: Load time PinmemberChris Apple10-Mar-12 8:39 
GeneralGetVersionStrings() fails Pinmembermegraham@msn.com19-May-09 10:19 
GeneralRe: GetVersionStrings() fails Pinmemberalexey.voropaev11-May-12 2:42 
GeneralRe: GetVersionStrings() fails PinmemberChris Apple11-May-12 4:55 
GeneralVery nice! PinmvpHans Dietrich22-Apr-09 0:36 
GeneralRe: Very nice! PinmemberChris Apple22-Apr-09 3:43 

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