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Pan and Zoom Very Large Images

, 31 Oct 2009
Smoothly panning and zooming very large images can be a challenge. Here’s a control, with source code, that demonstrates one way of overcoming this challenge, as well as a few "Extra" image processing features.
imageviewerdemo.zip
ImageViewerDemo
bin
ImageViewerDemo.exe
ImageViewerDemo.pdb
ImageViewerDemo.suo
ImageViewerDemo.vbproj.user
obj
Debug
ImageViewerDemo.exe
ImageViewerDemo.Form1.resources
ImageViewerDemo.ImageViewer.resources
ImageViewerDemo.pdb
temp
TempPE
queens_imagecontrol_vs2005.zip
Queens_ImageControl_VS2005
Queens_ImageControl.suo
Queens_ImageControl
bin
Debug
Queens_ImageControl.dll
My Project
Application.myapp
Settings.settings
Queens_ImageControl.vbproj.user
Test Harness
bin
Debug
Queens_ImageControl.dll
Test Harness.exe
My Project
Application.myapp
Settings.settings
Resources
Test Harness.vbproj.user
<VisualStudioProject>
    <VisualBasic
        ProjectType = "Local"
        ProductVersion = "7.10.3077"
        SchemaVersion = "2.0"
        ProjectGuid = "{65C3AEFB-06B6-4F6B-B377-8E6D941449F0}"
    >
        <Build>
            <Settings
                ApplicationIcon = ""
                AssemblyKeyContainerName = ""
                AssemblyName = "ImageViewerDemo"
                AssemblyOriginatorKeyFile = ""
                AssemblyOriginatorKeyMode = "None"
                DefaultClientScript = "JScript"
                DefaultHTMLPageLayout = "Grid"
                DefaultTargetSchema = "IE50"
                DelaySign = "false"
                OutputType = "WinExe"
                OptionCompare = "Binary"
                OptionExplicit = "On"
                OptionStrict = "Off"
                RootNamespace = "ImageViewerDemo"
                StartupObject = "ImageViewerDemo.Form1"
            >
                <Config
                    Name = "Debug"
                    BaseAddress = "285212672"
                    ConfigurationOverrideFile = ""
                    DefineConstants = ""
                    DefineDebug = "true"
                    DefineTrace = "true"
                    DebugSymbols = "true"
                    IncrementalBuild = "true"
                    Optimize = "false"
                    OutputPath = "bin\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "1"
                />
                <Config
                    Name = "Release"
                    BaseAddress = "285212672"
                    ConfigurationOverrideFile = ""
                    DefineConstants = ""
                    DefineDebug = "false"
                    DefineTrace = "true"
                    DebugSymbols = "false"
                    IncrementalBuild = "false"
                    Optimize = "true"
                    OutputPath = "bin\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "1"
                />
            </Settings>
            <References>
                <Reference
                    Name = "System"
                    AssemblyName = "System"
                />
                <Reference
                    Name = "System.Data"
                    AssemblyName = "System.Data"
                />
                <Reference
                    Name = "System.Drawing"
                    AssemblyName = "System.Drawing"
                />
                <Reference
                    Name = "System.Windows.Forms"
                    AssemblyName = "System.Windows.Forms"
                />
                <Reference
                    Name = "System.XML"
                    AssemblyName = "System.Xml"
                />
            </References>
            <Imports>
                <Import Namespace = "Microsoft.VisualBasic" />
                <Import Namespace = "System" />
                <Import Namespace = "System.Collections" />
                <Import Namespace = "System.Data" />
                <Import Namespace = "System.Drawing" />
                <Import Namespace = "System.Diagnostics" />
                <Import Namespace = "System.Windows.Forms" />
            </Imports>
        </Build>
        <Files>
            <Include>
                <File
                    RelPath = "AssemblyInfo.vb"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "Form1.vb"
                    SubType = "Form"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "Form1.resx"
                    DependentUpon = "Form1.vb"
                    BuildAction = "EmbeddedResource"
                />
                <File
                    RelPath = "ImageViewer.vb"
                    SubType = "UserControl"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "ImageViewer.resx"
                    DependentUpon = "ImageViewer.vb"
                    BuildAction = "EmbeddedResource"
                />
            </Include>
        </Files>
    </VisualBasic>
</VisualStudioProject>

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

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About the Author

Anthony Queen
Software Developer (Senior)
United States United States
I started my career in software development back in 2000. Prior to that, I made my living as a detail drafter. My true start in programming, though, goes back much further. I first started learning to program when I was about 10 years old. It was back in ‘82 that I wrote my first application. It was a simple calculator program written on a TRS-80 that my uncle had. Since then, I’ve programmed in Basic, QuickBasic, Pascal, C++, VB 6, VB.NET, Java, HTML, and C #. I have a very diverse background. I’ve worked and written software for several types of companies, including manufacturing, engineering, and finance. I’ve had the opportunity to design and maintain a few enterprise level databases, I’ve written applications to run on windows CE, in a wireless manufacturing environment. I’ve also had opportunities to teach OOP methodologies, and design patterns. I thoroughly enjoy what I do, and my only regret is that I didn’t start sooner.

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