Resize an image: bug?
in [VB.NET]
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From: zzz on 26 Apr 2010 05:20 Hi to all, inside a subroutine i have this code: Me.PictureBox1.Size = New Size(Me.dimensioni.Width * Me.zoom_factor, Me.dimensioni.Height * Me.zoom_factor) When the program goes out of sub I get the error: System.ComponentModel.Win32Exception non � stata gestita Message="Operazione completata" Source="System.Drawing" ErrorCode=-2147467259 NativeErrorCode=0 StackTrace: in System.Drawing.BufferedGraphicsContext.CreateCompatibleDIB(IntPtr hdc, IntPtr hpal, Int32 ulWidth, Int32 ulHeight, IntPtr& ppvBits) in System.Drawing.BufferedGraphicsContext.CreateBuffer(IntPtr src, Int32 offsetX, Int32 offsetY, Int32 width, Int32 height) in System.Drawing.BufferedGraphicsContext.AllocBuffer(Graphics targetGraphics, IntPtr targetDC, Rectangle targetRectangle) in System.Drawing.BufferedGraphicsContext.AllocBufferInTempManager(Graphics targetGraphics, IntPtr targetDC, Rectangle targetRectangle) in System.Drawing.BufferedGraphicsContext.Allocate(IntPtr targetDC, Rectangle targetRectangle) in System.Windows.Forms.Control.WmPaint(Message& m) in System.Windows.Forms.Control.WndProc(Message& m) in System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) in System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) in System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) in System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) in System.Windows.Forms.Application.Run(ApplicationContext context) in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun() in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel() in Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine) in EGF.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:riga 81 in System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) in System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() in System.Threading.ThreadHelper.ThreadStart_Context(Object state) in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) in System.Threading.ThreadHelper.ThreadStart() InnerException: I tried to insert the code inside a try catch but without success. Can anyone help me? Thanks
From: Armin Zingler on 26 Apr 2010 06:17 Am 26.04.2010 11:20, schrieb zzz: > Hi to all, > inside a subroutine i have this code: > > Me.PictureBox1.Size = New Size(Me.dimensioni.Width * Me.zoom_factor, > Me.dimensioni.Height * Me.zoom_factor) Which event handler calles this sub routine? What does debug.print(Me.PictureBox1.Size.tostring) output directly after the assignment? -- Armin
From: Cor Ligthert[MVP] on 26 Apr 2010 06:23 Why do you think that this quit standard code which is probably billion times used has a bug. Or do you mean in your program, that is possible, but then you can simply try it by placing some fixed values instead of the calculation. I assume you have option strict on in top of your program to be sure the correct types are used. "zzz" <zzz(a)tin.it> wrote in message news:4bd55b2d$0$1117$4fafbaef(a)reader2.news.tin.it... > Hi to all, > inside a subroutine i have this code: > > Me.PictureBox1.Size = New Size(Me.dimensioni.Width * Me.zoom_factor, > Me.dimensioni.Height * Me.zoom_factor) > > When the program goes out of sub I get the error: > > System.ComponentModel.Win32Exception non � stata gestita > Message="Operazione completata" > Source="System.Drawing" > ErrorCode=-2147467259 > NativeErrorCode=0 > StackTrace: > in System.Drawing.BufferedGraphicsContext.CreateCompatibleDIB(IntPtr > hdc, IntPtr hpal, Int32 ulWidth, Int32 ulHeight, IntPtr& ppvBits) > in System.Drawing.BufferedGraphicsContext.CreateBuffer(IntPtr src, > Int32 offsetX, Int32 offsetY, Int32 width, Int32 height) > in System.Drawing.BufferedGraphicsContext.AllocBuffer(Graphics > targetGraphics, IntPtr targetDC, Rectangle targetRectangle) > in > System.Drawing.BufferedGraphicsContext.AllocBufferInTempManager(Graphics > targetGraphics, IntPtr targetDC, Rectangle targetRectangle) > in System.Drawing.BufferedGraphicsContext.Allocate(IntPtr targetDC, > Rectangle targetRectangle) > in System.Windows.Forms.Control.WmPaint(Message& m) > in System.Windows.Forms.Control.WndProc(Message& m) > in > System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) > in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& > m) > in System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, > Int32 msg, IntPtr wparam, IntPtr lparam) > in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& > msg) > in > System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 > dwComponentID, Int32 reason, Int32 pvLoopData) > in > System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 > reason, ApplicationContext context) > in > System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 > reason, > ApplicationContext context) > in System.Windows.Forms.Application.Run(ApplicationContext context) > in > Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun() > in > Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel() > in > Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] > commandLine) > in EGF.My.MyApplication.Main(String[] Args) in > 17d14f5c-a337-4978-8281-53493378c1071.vb:riga 81 > in System.AppDomain._nExecuteAssembly(Assembly assembly, String[] > args) > in System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence > assemblySecurity, String[] args) > in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() > in System.Threading.ThreadHelper.ThreadStart_Context(Object state) > in System.Threading.ExecutionContext.Run(ExecutionContext > executionContext, ContextCallback callback, Object state) > in System.Threading.ThreadHelper.ThreadStart() > InnerException: > > I tried to insert the code inside a try catch but without success. > Can anyone help me? > Thanks > > >
From: zzz on 26 Apr 2010 08:38 "Armin Zingler" <az.nospam(a)freenet.de> ha scritto nel messaggio news:%23Tes8nS5KHA.1932(a)TK2MSFTNGP05.phx.gbl... > Am 26.04.2010 11:20, schrieb zzz: >> Hi to all, >> inside a subroutine i have this code: >> >> Me.PictureBox1.Size = New Size(Me.dimensioni.Width * Me.zoom_factor, >> Me.dimensioni.Height * Me.zoom_factor) > > Which event handler calles this sub routine? > > What does > > debug.print(Me.PictureBox1.Size.tostring) > > output directly after the assignment? > > > > -- > Armin My code is inside ..MouseWheel event( is about zooming an image displayed in a form). Private Sub pict_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseWheel try If e.Delta < 0 Then Me.zoom_factor *= 2 Else Me.zoom_factor /= 2 End If Me.PictureBox1.Size = New Size(Me.dimensioni.Width * Me.zoom_factor, Me.dimensioni.Height * Me.zoom_factor) Debug.Print(Me.zoom_factor.ToString) Catch ex As Exception MsgBox(ex.Message) End Try when zoom_factor reaches a 2048 value, I get the error, but the exception is not raised.....so I really don't known where the dll exception is raised. Maybe too large dimension of image makes it up....
From: Patrice on 26 Apr 2010 09:32
Hello, > when zoom_factor reaches a 2048 value, I get the error, but the exception > is not raised.....so I really don't known where the dll exception is > raised. Looking at the call stack, it seems to happens when the control is painted, not at the time of the change. > Maybe too large dimension of image makes it up.... I would really set a max value for the zoom. 2048 likely means you just see a single pixel on your screen anyway ;-) -- Patrice |