MStatus marqueeContext::doRelease( MEvent & event )
//
// Selects objects within the marquee box.
{
MSelectionList incomingList, marqueeList;
// Clear the marquee when you release the mouse button
#ifdef USE_SOFTWARE_OVERLAYS
GLboolean depthTest[1];
GLboolean colorLogicOp[1];
GLboolean lineStipple[1];
event.getPosition( last_x, last_y );
// Save the state of these 3 attribtes and restore them later.
glGetBooleanv (GL_DEPTH_TEST, depthTest);
glGetBooleanv (GL_COLOR_LOGIC_OP, colorLogicOp);
glGetBooleanv (GL_LINE_STIPPLE, lineStipple);
// Turn Line stippling on.
glLineStipple( 1, 0x5555 );
glLineWidth( 1.0 );
glEnable( GL_LINE_STIPPLE );
// Disable GL_DEPTH_TEST
glDisable (GL_DEPTH_TEST);
// Enable XOR mode.
glEnable(GL_COLOR_LOGIC_OP);
glLogicOp (GL_INVERT);
// Save the current Matrix onto the stack
glMatrixMode (GL_MODELVIEW);
glPushMatrix();
// Setup the Orthographic projection Matrix.
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluOrtho2D(
0.0, (GLdouble) view.portWidth(),
0.0, (GLdouble) view.portHeight()
);
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef(0.375, 0.375, 0.0);
// Set the draw color
glIndexi (2);
// Redraw the marquee so that it will be cleared from the screen
// when the mouse is released.
glBegin( GL_LINE_LOOP );
glVertex2i( start_x, start_y );
glVertex2i( p_last_x, start_y );
glVertex2i( p_last_x, p_last_y );
glVertex2i( start_x, p_last_y );
glEnd();
#ifndef _WIN32
glXSwapBuffers( view.display(), view.window() );
#else
SwapBuffers( view.deviceContext() );
#endif
// Restore saved Matrix from stack
glMatrixMode( GL_MODELVIEW );
glPopMatrix();
glDisable(GL_COLOR_LOGIC_OP);
// Restore the previous state of these attributes
if (colorLogicOp[0])
glEnable (GL_COLOR_LOGIC_OP);
else
glDisable (GL_COLOR_LOGIC_OP);
if (depthTest[0])
glEnable (GL_DEPTH_TEST);
else
glDisable (GL_DEPTH_TEST);
if (lineStipple[0])
glEnable( GL_LINE_STIPPLE );
else
glDisable( GL_LINE_STIPPLE );
#else
// If HW overlays enabled, then clear the overlay plane
// such that the marquee is no longer drawn on screen.
view.clearOverlayPlane();
view.endOverlayDrawing();
#endif
view.endGL();
// Get the end position of the marquee
event.getPosition( last_x, last_y );
// Save the state of the current selections. The "selectFromSceen"
// below will alter the active list, and we have to be able to put
// it back.
MGlobal::getActiveSelectionList(incomingList);
// If we have a zero dimension box, just do a point pick
//
if ( abs(start_x - last_x) < 2 && abs(start_y - last_y) < 2 ) {
MGlobal::selectFromScreen( start_x, start_y, MGlobal::kReplaceList );
} else {
// Select all the objects or components within the marquee.
MGlobal::selectFromScreen( start_x, start_y, last_x, last_y,
MGlobal::kReplaceList );
}
// Get the list of selected items
MGlobal::getActiveSelectionList(marqueeList);
// Restore the active selection list to what it was before
// the "selectFromScreen"
MGlobal::setActiveSelectionList(incomingList, MGlobal::kReplaceList);
// Update the selection list as indicated by the modifier keys.
MGlobal::selectCommand(marqueeList, listAdjustment);
return MS::kSuccess;
}
MStatus marqueeContext::doDrag( MEvent & event )
//
// Drag out the marquee (using OpenGL)
//
{
event.getPosition( last_x, last_y );
#ifdef USE_SOFTWARE_OVERLAYS
GLboolean depthTest[1];
GLboolean colorLogicOp[1];
GLboolean lineStipple[1];
// Save the state of these 3 attribtes and restore them later.
glGetBooleanv (GL_DEPTH_TEST, depthTest);
glGetBooleanv (GL_COLOR_LOGIC_OP, colorLogicOp);
glGetBooleanv (GL_LINE_STIPPLE, lineStipple);
#endif
// Turn Line stippling on.
glLineStipple( 1, 0x5555 );
glLineWidth( 1.0 );
glEnable( GL_LINE_STIPPLE );
// Save the state of the matrix on stack
glMatrixMode (GL_MODELVIEW);
glPushMatrix();
// Setup the Orthographic projection Matrix.
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluOrtho2D(
0.0, (GLdouble) view.portWidth(),
0.0, (GLdouble) view.portHeight()
);
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef(0.375, 0.375, 0.0);
// Set the draw color
glIndexi (2);
// If we are using software overlays then we need to draw the marquee
// in XOR mode
#ifdef USE_SOFTWARE_OVERLAYS
glDisable (GL_DEPTH_TEST);
// Enable XOR mode.
glEnable(GL_COLOR_LOGIC_OP);
glLogicOp (GL_XOR);
// We erase the previously drawn rubber band on the screen by
// redrawing it in XOR OpenGL mode.
if (fsDrawn)
{
glBegin( GL_LINE_LOOP );
glVertex2i( start_x, start_y );
glVertex2i( p_last_x, start_y );
glVertex2i( p_last_x, p_last_y );
glVertex2i( start_x, p_last_y );
glEnd();
}
fsDrawn = true;
#else
// If HW overlays enabled then we will clear the overlay plane
// so that the previously drawn marquee does not appear on the screen
// anymore
view.clearOverlayPlane();
#endif
// Draw the rectangular marquee
//
glBegin( GL_LINE_LOOP );
glVertex2i( start_x, start_y );
glVertex2i( last_x, start_y );
glVertex2i( last_x, last_y );
glVertex2i( start_x, last_y );
glEnd();
#ifdef _WIN32
SwapBuffers( view.deviceContext() );
#elif defined (OSMac_)
::aglSwapBuffers(view.display());
#else
glXSwapBuffers( view.display(), view.window() );
#endif
// Restore the state of the matrix from stack
glMatrixMode( GL_MODELVIEW );
glPopMatrix();
#ifdef USE_SOFTWARE_OVERLAYS
// Store the current x and y coordinates such that in the next iteration
// we can erase this marquee by redrawing it in XOR mode.
p_last_x = last_x;
p_last_y = last_y;
// Restore the previous state of these attributes
if (colorLogicOp[0])
glEnable (GL_COLOR_LOGIC_OP);
else
glDisable (GL_COLOR_LOGIC_OP);
if (depthTest[0])
glEnable (GL_DEPTH_TEST);
else
glDisable (GL_DEPTH_TEST);
if (lineStipple[0])
glEnable( GL_LINE_STIPPLE );
else
glDisable( GL_LINE_STIPPLE );
#endif
return MS::kSuccess;
}