llresizehandle.cpp
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- /**
- * @file llresizehandle.cpp
- * @brief LLResizeHandle base class
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #include "linden_common.h"
- #include "llresizehandle.h"
- #include "llfocusmgr.h"
- #include "llmath.h"
- #include "llui.h"
- #include "llmenugl.h"
- #include "llcontrol.h"
- #include "llfloater.h"
- #include "llwindow.h"
- const S32 RESIZE_BORDER_WIDTH = 3;
- LLResizeHandle::Params::Params()
- : corner("corner"),
- min_width("min_width"),
- min_height("min_height")
- {
- name = "resize_handle";
- }
- LLResizeHandle::LLResizeHandle(const LLResizeHandle::Params& p)
- : LLView(p),
- mDragLastScreenX( 0 ),
- mDragLastScreenY( 0 ),
- mLastMouseScreenX( 0 ),
- mLastMouseScreenY( 0 ),
- mImage( NULL ),
- mMinWidth( p.min_width ),
- mMinHeight( p.min_height ),
- mCorner( p.corner )
- {
- if( RIGHT_BOTTOM == mCorner)
- {
- mImage = LLUI::getUIImage("Resize_Corner");
- }
- switch( p.corner )
- {
- case LEFT_TOP: setFollows( FOLLOWS_LEFT | FOLLOWS_TOP ); break;
- case LEFT_BOTTOM: setFollows( FOLLOWS_LEFT | FOLLOWS_BOTTOM ); break;
- case RIGHT_TOP: setFollows( FOLLOWS_RIGHT | FOLLOWS_TOP ); break;
- case RIGHT_BOTTOM: setFollows( FOLLOWS_RIGHT | FOLLOWS_BOTTOM ); break;
- }
- }
- BOOL LLResizeHandle::handleMouseDown(S32 x, S32 y, MASK mask)
- {
- BOOL handled = FALSE;
- if( pointInHandle(x, y) )
- {
- handled = TRUE;
- // Route future Mouse messages here preemptively. (Release on mouse up.)
- // No handler needed for focus lost since this clas has no state that depends on it.
- gFocusMgr.setMouseCapture( this );
- localPointToScreen(x, y, &mDragLastScreenX, &mDragLastScreenY);
- mLastMouseScreenX = mDragLastScreenX;
- mLastMouseScreenY = mDragLastScreenY;
- }
- return handled;
- }
- BOOL LLResizeHandle::handleMouseUp(S32 x, S32 y, MASK mask)
- {
- BOOL handled = FALSE;
- if( hasMouseCapture() )
- {
- // Release the mouse
- gFocusMgr.setMouseCapture( NULL );
- handled = TRUE;
- }
- else if( pointInHandle(x, y) )
- {
- handled = TRUE;
- }
- return handled;
- }
- BOOL LLResizeHandle::handleHover(S32 x, S32 y, MASK mask)
- {
- BOOL handled = FALSE;
- // We only handle the click if the click both started and ended within us
- if( hasMouseCapture() )
- {
- // Make sure the mouse in still over the application. We don't want to make the parent
- // so big that we can't see the resize handle any more.
-
- S32 screen_x;
- S32 screen_y;
- localPointToScreen(x, y, &screen_x, &screen_y);
- const LLRect valid_rect = getRootView()->getRect();
- screen_x = llclamp( screen_x, valid_rect.mLeft, valid_rect.mRight );
- screen_y = llclamp( screen_y, valid_rect.mBottom, valid_rect.mTop );
- LLView* resizing_view = getParent();
- if( resizing_view )
- {
- // undock floater when user resize it
- LLFloater* floater_parent = dynamic_cast<LLFloater*>(getParent());
- if (floater_parent && floater_parent->isDocked())
- {
- floater_parent->setDocked(false, false);
- }
- // Resize the parent
- LLRect orig_rect = resizing_view->getRect();
- LLRect scaled_rect = orig_rect;
- S32 delta_x = screen_x - mDragLastScreenX;
- S32 delta_y = screen_y - mDragLastScreenY;
- LLCoordGL mouse_dir;
- // use hysteresis on mouse motion to preserve user intent when mouse stops moving
- mouse_dir.mX = (screen_x == mLastMouseScreenX) ? mLastMouseDir.mX : screen_x - mLastMouseScreenX;
- mouse_dir.mY = (screen_y == mLastMouseScreenY) ? mLastMouseDir.mY : screen_y - mLastMouseScreenY;
- mLastMouseScreenX = screen_x;
- mLastMouseScreenY = screen_y;
- mLastMouseDir = mouse_dir;
- S32 x_multiple = 1;
- S32 y_multiple = 1;
- switch( mCorner )
- {
- case LEFT_TOP:
- x_multiple = -1;
- y_multiple = 1;
- break;
- case LEFT_BOTTOM:
- x_multiple = -1;
- y_multiple = -1;
- break;
- case RIGHT_TOP:
- x_multiple = 1;
- y_multiple = 1;
- break;
- case RIGHT_BOTTOM:
- x_multiple = 1;
- y_multiple = -1;
- break;
- }
- S32 new_width = orig_rect.getWidth() + x_multiple * delta_x;
- if( new_width < mMinWidth )
- {
- new_width = mMinWidth;
- delta_x = x_multiple * (mMinWidth - orig_rect.getWidth());
- }
- S32 new_height = orig_rect.getHeight() + y_multiple * delta_y;
- if( new_height < mMinHeight )
- {
- new_height = mMinHeight;
- delta_y = y_multiple * (mMinHeight - orig_rect.getHeight());
- }
- switch( mCorner )
- {
- case LEFT_TOP:
- scaled_rect.translate(delta_x, 0);
- break;
- case LEFT_BOTTOM:
- scaled_rect.translate(delta_x, delta_y);
- break;
- case RIGHT_TOP:
- break;
- case RIGHT_BOTTOM:
- scaled_rect.translate(0, delta_y);
- break;
- }
- // temporarily set new parent rect
- scaled_rect.mRight = scaled_rect.mLeft + new_width;
- scaled_rect.mTop = scaled_rect.mBottom + new_height;
- resizing_view->setRect(scaled_rect);
- LLView* snap_view = NULL;
- LLView* test_view = NULL;
- static LLUICachedControl<S32> snap_margin ("SnapMargin", 0);
- // now do snapping
- switch(mCorner)
- {
- case LEFT_TOP:
- snap_view = resizing_view->findSnapEdge(scaled_rect.mLeft, mouse_dir, SNAP_LEFT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- test_view = resizing_view->findSnapEdge(scaled_rect.mTop, mouse_dir, SNAP_TOP, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- if (!snap_view)
- {
- snap_view = test_view;
- }
- break;
- case LEFT_BOTTOM:
- snap_view = resizing_view->findSnapEdge(scaled_rect.mLeft, mouse_dir, SNAP_LEFT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- test_view = resizing_view->findSnapEdge(scaled_rect.mBottom, mouse_dir, SNAP_BOTTOM, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- if (!snap_view)
- {
- snap_view = test_view;
- }
- break;
- case RIGHT_TOP:
- snap_view = resizing_view->findSnapEdge(scaled_rect.mRight, mouse_dir, SNAP_RIGHT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- test_view = resizing_view->findSnapEdge(scaled_rect.mTop, mouse_dir, SNAP_TOP, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- if (!snap_view)
- {
- snap_view = test_view;
- }
- break;
- case RIGHT_BOTTOM:
- snap_view = resizing_view->findSnapEdge(scaled_rect.mRight, mouse_dir, SNAP_RIGHT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- test_view = resizing_view->findSnapEdge(scaled_rect.mBottom, mouse_dir, SNAP_BOTTOM, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- if (!snap_view)
- {
- snap_view = test_view;
- }
- break;
- }
- // register "snap" behavior with snapped view
- resizing_view->setSnappedTo(snap_view);
- // reset parent rect
- resizing_view->setRect(orig_rect);
- // translate and scale to new shape
- resizing_view->setShape(scaled_rect, true);
-
- // update last valid mouse cursor position based on resized view's actual size
- LLRect new_rect = resizing_view->getRect();
- switch(mCorner)
- {
- case LEFT_TOP:
- mDragLastScreenX += new_rect.mLeft - orig_rect.mLeft;
- mDragLastScreenY += new_rect.mTop - orig_rect.mTop;
- break;
- case LEFT_BOTTOM:
- mDragLastScreenX += new_rect.mLeft - orig_rect.mLeft;
- mDragLastScreenY += new_rect.mBottom- orig_rect.mBottom;
- break;
- case RIGHT_TOP:
- mDragLastScreenX += new_rect.mRight - orig_rect.mRight;
- mDragLastScreenY += new_rect.mTop - orig_rect.mTop;
- break;
- case RIGHT_BOTTOM:
- mDragLastScreenX += new_rect.mRight - orig_rect.mRight;
- mDragLastScreenY += new_rect.mBottom- orig_rect.mBottom;
- break;
- default:
- break;
- }
- }
- handled = TRUE;
- }
- else // don't have mouse capture
- {
- if( pointInHandle( x, y ) )
- {
- handled = TRUE;
- }
- }
- if( handled )
- {
- switch( mCorner )
- {
- case RIGHT_BOTTOM:
- case LEFT_TOP:
- getWindow()->setCursor(UI_CURSOR_SIZENWSE);
- break;
- case LEFT_BOTTOM:
- case RIGHT_TOP:
- getWindow()->setCursor(UI_CURSOR_SIZENESW);
- break;
- }
- }
- return handled;
- } // end handleHover
- // assumes GL state is set for 2D
- void LLResizeHandle::draw()
- {
- if( mImage.notNull() && getVisible() && (RIGHT_BOTTOM == mCorner) )
- {
- mImage->draw(0, 0);
- }
- }
- BOOL LLResizeHandle::pointInHandle( S32 x, S32 y )
- {
- if( pointInView(x, y) )
- {
- const S32 TOP_BORDER = (getRect().getHeight() - RESIZE_BORDER_WIDTH);
- const S32 RIGHT_BORDER = (getRect().getWidth() - RESIZE_BORDER_WIDTH);
- switch( mCorner )
- {
- case LEFT_TOP: return (x <= RESIZE_BORDER_WIDTH) || (y >= TOP_BORDER);
- case LEFT_BOTTOM: return (x <= RESIZE_BORDER_WIDTH) || (y <= RESIZE_BORDER_WIDTH);
- case RIGHT_TOP: return (x >= RIGHT_BORDER) || (y >= TOP_BORDER);
- case RIGHT_BOTTOM: return TRUE;
- }
- }
- return FALSE;
- }