/** * @file llresizehandle.cpp * @brief LLResizeHandle base class * * $LicenseInfo:firstyear=2001&license=viewergpl$ * * Copyright (c) 2001-2009, 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 ) { // 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; }