FrameStyle Enumeration
Specifies the frame style of the selected control.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
This enumeration is used by ControlPaint::DrawReversibleFrame.
DrawReversibleFrame is used when selecting objects or during drag-and-drop operations.
The following code example demonstrates using the FrameStyle enumeration. To run the example, paste the following code in a form called Form1 containing several controls.This example assumes the MouseDown, MouseMove, and MouseUp events are connected to the event-handler methods defined in the example.
private: // The following three methods will draw a rectangle and allow // the user to use the mouse to resize the rectangle. If the // rectangle intersects a control's client rectangle, the // control's color will change. bool isDrag; Rectangle theRectangle; Point startPoint; void Form1_MouseDown( Object^ sender, System::Windows::Forms::MouseEventArgs^ e ) { // Set the isDrag variable to true and get the starting point // by using the PointToScreen method to convert form // coordinates to screen coordinates. if ( e->Button == ::MouseButtons::Left ) { isDrag = true; } Control^ control = dynamic_cast<Control^>(sender); // Calculate the startPoint by using the PointToScreen // method. startPoint = control->PointToScreen( Point(e->X,e->Y) ); } void Form1_MouseMove( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ e ) { // If the mouse is being dragged, // undraw and redraw the rectangle as the mouse moves. if ( isDrag ) { ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed ); // Calculate the endpoint and dimensions for the new // rectangle, again using the PointToScreen method. Point endPoint = this->PointToScreen( Point(e->X,e->Y) ); int width = endPoint.X - startPoint.X; int height = endPoint.Y - startPoint.Y; theRectangle = Rectangle(startPoint.X,startPoint.Y,width,height); // Draw the new rectangle by calling DrawReversibleFrame // again. ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed ); } } void Form1_MouseUp( Object^ /*sender*/, System::Windows::Forms::MouseEventArgs^ /*e*/ ) { // If the MouseUp event occurs, the user is not dragging. isDrag = false; // Draw the rectangle to be evaluated. Set a dashed frame style // using the FrameStyle enumeration. ControlPaint::DrawReversibleFrame( theRectangle, this->BackColor, FrameStyle::Dashed ); // Find out which controls intersect the rectangle and // change their color. The method uses the RectangleToScreen // method to convert the Control's client coordinates // to screen coordinates. Rectangle controlRectangle; for ( int i = 0; i < Controls->Count; i++ ) { controlRectangle = Controls[ i ]->RectangleToScreen( Controls[ i ]->ClientRectangle ); if ( controlRectangle.IntersectsWith( theRectangle ) ) { Controls[ i ]->BackColor = Color::BurlyWood; } } // Reset the rectangle. theRectangle = Rectangle(0,0,0,0); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.