llresizebar.cpp
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上传日期:2021-03-01
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- /**
- * @file llresizebar.cpp
- * @brief LLResizeBar 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 "llresizebar.h"
- #include "llmath.h"
- #include "llui.h"
- #include "llmenugl.h"
- #include "llfocusmgr.h"
- #include "llwindow.h"
- LLResizeBar::LLResizeBar(const LLResizeBar::Params& p)
- : LLView(p),
- mDragLastScreenX( 0 ),
- mDragLastScreenY( 0 ),
- mLastMouseScreenX( 0 ),
- mLastMouseScreenY( 0 ),
- mMinSize( p.min_size ),
- mMaxSize( p.max_size ),
- mSide( p.side ),
- mSnappingEnabled(p.snapping_enabled),
- mAllowDoubleClickSnapping(p.allow_double_click_snapping),
- mResizingView(p.resizing_view)
- {
- setFollowsNone();
- // set up some generically good follow code.
- switch( mSide )
- {
- case LEFT:
- setFollowsLeft();
- setFollowsTop();
- setFollowsBottom();
- break;
- case TOP:
- setFollowsTop();
- setFollowsLeft();
- setFollowsRight();
- break;
- case RIGHT:
- setFollowsRight();
- setFollowsTop();
- setFollowsBottom();
- break;
- case BOTTOM:
- setFollowsBottom();
- setFollowsLeft();
- setFollowsRight();
- break;
- default:
- break;
- }
- }
- BOOL LLResizeBar::handleMouseDown(S32 x, S32 y, MASK mask)
- {
- // 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 TRUE;
- }
- BOOL LLResizeBar::handleMouseUp(S32 x, S32 y, MASK mask)
- {
- BOOL handled = FALSE;
- if( hasMouseCapture() )
- {
- // Release the mouse
- gFocusMgr.setMouseCapture( NULL );
- handled = TRUE;
- }
- else
- {
- handled = TRUE;
- }
- return handled;
- }
- BOOL LLResizeBar::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() )
- {
- S32 screen_x;
- S32 screen_y;
- localPointToScreen(x, y, &screen_x, &screen_y);
-
- 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;
- mLastMouseDir = mouse_dir;
- mLastMouseScreenX = screen_x;
- mLastMouseScreenY = screen_y;
- // 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.
- LLRect valid_rect = getRootView()->getRect();
-
- if( valid_rect.localPointInRect( screen_x, screen_y ) && mResizingView )
- {
- // undock floater when user resize it
- LLFloater* parent = dynamic_cast<LLFloater*>( getParent());
- if (parent && parent->isDocked())
- {
- parent->setDocked( false, false);
- }
- // Resize the parent
- LLRect orig_rect = mResizingView->getRect();
- LLRect scaled_rect = orig_rect;
-
- S32 new_width = orig_rect.getWidth();
- S32 new_height = orig_rect.getHeight();
- switch( mSide )
- {
- case LEFT:
- new_width = llclamp(orig_rect.getWidth() - delta_x, mMinSize, mMaxSize);
- delta_x = orig_rect.getWidth() - new_width;
- scaled_rect.translate(delta_x, 0);
- break;
- case TOP:
- new_height = llclamp(orig_rect.getHeight() + delta_y, mMinSize, mMaxSize);
- delta_y = new_height - orig_rect.getHeight();
- break;
-
- case RIGHT:
- new_width = llclamp(orig_rect.getWidth() + delta_x, mMinSize, mMaxSize);
- delta_x = new_width - orig_rect.getWidth();
- break;
-
- case BOTTOM:
- new_height = llclamp(orig_rect.getHeight() - delta_y, mMinSize, mMaxSize);
- delta_y = orig_rect.getHeight() - new_height;
- scaled_rect.translate(0, delta_y);
- break;
- }
- scaled_rect.mTop = scaled_rect.mBottom + new_height;
- scaled_rect.mRight = scaled_rect.mLeft + new_width;
- mResizingView->setRect(scaled_rect);
- LLView* snap_view = NULL;
- if (mSnappingEnabled)
- {
- static LLUICachedControl<S32> snap_margin ("SnapMargin", 0);
- switch( mSide )
- {
- case LEFT:
- snap_view = mResizingView->findSnapEdge(scaled_rect.mLeft, mouse_dir, SNAP_LEFT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- break;
- case TOP:
- snap_view = mResizingView->findSnapEdge(scaled_rect.mTop, mouse_dir, SNAP_TOP, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- break;
- case RIGHT:
- snap_view = mResizingView->findSnapEdge(scaled_rect.mRight, mouse_dir, SNAP_RIGHT, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- break;
- case BOTTOM:
- snap_view = mResizingView->findSnapEdge(scaled_rect.mBottom, mouse_dir, SNAP_BOTTOM, SNAP_PARENT_AND_SIBLINGS, snap_margin);
- break;
- }
- }
- // register "snap" behavior with snapped view
- mResizingView->setSnappedTo(snap_view);
- // restore original rectangle so the appropriate changes are detected
- mResizingView->setRect(orig_rect);
- // change view shape as user operation
- mResizingView->setShape(scaled_rect, true);
- // update last valid mouse cursor position based on resized view's actual size
- LLRect new_rect = mResizingView->getRect();
- switch(mSide)
- {
- case LEFT:
- mDragLastScreenX += new_rect.mLeft - orig_rect.mLeft;
- break;
- case RIGHT:
- mDragLastScreenX += new_rect.mRight - orig_rect.mRight;
- break;
- case TOP:
- mDragLastScreenY += new_rect.mTop - orig_rect.mTop;
- break;
- case BOTTOM:
- mDragLastScreenY += new_rect.mBottom- orig_rect.mBottom;
- break;
- default:
- break;
- }
- }
- handled = TRUE;
- }
- else
- {
- handled = TRUE;
- }
- if( handled )
- {
- switch( mSide )
- {
- case LEFT:
- case RIGHT:
- getWindow()->setCursor(UI_CURSOR_SIZEWE);
- break;
- case TOP:
- case BOTTOM:
- getWindow()->setCursor(UI_CURSOR_SIZENS);
- break;
- }
- }
- return handled;
- } // end LLResizeBar::handleHover
- BOOL LLResizeBar::handleDoubleClick(S32 x, S32 y, MASK mask)
- {
- LLRect orig_rect = mResizingView->getRect();
- LLRect scaled_rect = orig_rect;
- if (mSnappingEnabled && mAllowDoubleClickSnapping)
- {
- switch( mSide )
- {
- case LEFT:
- mResizingView->findSnapEdge(scaled_rect.mLeft, LLCoordGL(0, 0), SNAP_LEFT, SNAP_PARENT_AND_SIBLINGS, S32_MAX);
- scaled_rect.mLeft = scaled_rect.mRight - llclamp(scaled_rect.getWidth(), mMinSize, mMaxSize);
- break;
- case TOP:
- mResizingView->findSnapEdge(scaled_rect.mTop, LLCoordGL(0, 0), SNAP_TOP, SNAP_PARENT_AND_SIBLINGS, S32_MAX);
- scaled_rect.mTop = scaled_rect.mBottom + llclamp(scaled_rect.getHeight(), mMinSize, mMaxSize);
- break;
- case RIGHT:
- mResizingView->findSnapEdge(scaled_rect.mRight, LLCoordGL(0, 0), SNAP_RIGHT, SNAP_PARENT_AND_SIBLINGS, S32_MAX);
- scaled_rect.mRight = scaled_rect.mLeft + llclamp(scaled_rect.getWidth(), mMinSize, mMaxSize);
- break;
- case BOTTOM:
- mResizingView->findSnapEdge(scaled_rect.mBottom, LLCoordGL(0, 0), SNAP_BOTTOM, SNAP_PARENT_AND_SIBLINGS, S32_MAX);
- scaled_rect.mBottom = scaled_rect.mTop - llclamp(scaled_rect.getHeight(), mMinSize, mMaxSize);
- break;
- }
- mResizingView->setShape(scaled_rect, true);
- }
- return TRUE;
- }