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PODrawing Scale Image from rectangle
primarykey
Id
13259414
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2012-11-06T21:06:01.700
FavoriteCount
0
LastActivityDate
2012-11-06T22:30:08.660
LastEditDate
2012-11-06T22:30:08.660
LastEditorUserId
1020166
OwnerUserId
1020166
ParentId
0
PostTypeId
1
Score
0
ViewCount
381
LastEditorDisplayName
text
Body
<p>I am writing a delivery program for my final exam for my college on c++. I've downloaded a hd googlemaps screenshot but I have a big problem to draw it on my panel. I create a rectangle as a zoom, to draw just that portion of the image. But my code doesn't seem to be doing that. I need to draw the rectangle on my panel as a scale image of the real picture, cause I will be doing zoom, and moving the map as google maps, so I need to control the size of the rectangle. When I run this code, it just shows half of the image.</p> <pre><code>anchoImagen = PB_Mapa->Width/zoom; // zoom=1 altoImagen = PB_Mapa->Height/zoom; Graphics ^g = this->P_Mapa->CreateGraphics(); int gWidth = (int)g->VisibleClipBounds.Width; int gHeight = (int)g->VisibleClipBounds.Height; BufferedGraphicsContext ^espacioBuffer = BufferedGraphicsManager::Current; // Colocamos el tamaño máximo del Buffer // el +1 es para evitar errores de memoria. espacioBuffer->MaximumBuffer = System::Drawing::Size( gWidth + 1, gHeight + 1 ); // Creamos un canvas dentro del espacio del buffer utilizando el canvas // del formulario BufferedGraphics ^buffer = espacioBuffer->Allocate(g, Drawing::Rectangle(0, 0, gWidth, gHeight)); buffer->Graphics->Clear(Color::White); // Declaramos un rectangulo con las dimensiones del pedazo del sprite a utilizar Bitmap^ imgTransparente = gcnew Bitmap( PB_Mapa->Image); Drawing::Rectangle porcionAUsar = Drawing::Rectangle(x,y,anchoImagen,altoImagen); // Dibujamos la imagen en la posicion buffer->Graphics->DrawImage(imgTransparente, 0,0, porcionAUsar, GraphicsUnit::Pixel); buffer->Render(g); // Limpiamos la memoria reservada delete buffer; delete espacioBuffer; delete g; </code></pre>
Tags
<visual-studio-2010><graphics><c++-cli><buffer><picturebox>
Title
Drawing Scale Image from rectangle
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PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USGiuseppe
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1. USGiuseppe
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CommentsPostId
1. COAnyone know what language that is? Is it c++-cli?
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  PODrawing Scale Image from rectangle
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  USRobᵩ
2. COIts developed on Visual Studio 2010 c++-cli
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  PODrawing Scale Image from rectangle
  UserUserId
  USGiuseppe

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