724 lines
19 KiB
C++
724 lines
19 KiB
C++
/**
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* @file lllayoutstack.cpp
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* @brief LLLayout class - dynamic stacking of UI elements
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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// Opaque view with a background and a border. Can contain LLUICtrls.
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#include "linden_common.h"
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#include "lllayoutstack.h"
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#include "lllocalcliprect.h"
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#include "llpanel.h"
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#include "llresizebar.h"
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#include "llcriticaldamp.h"
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static LLDefaultChildRegistry::Register<LLLayoutStack> register_layout_stack("layout_stack");
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static LLLayoutStack::LayoutStackRegistry::Register<LLLayoutPanel> register_layout_panel("layout_panel");
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void LLLayoutStack::OrientationNames::declareValues()
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{
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declare("horizontal", HORIZONTAL);
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declare("vertical", VERTICAL);
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}
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//
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// LLLayoutPanel
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//
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LLLayoutPanel::LLLayoutPanel(const Params& p)
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: LLPanel(p),
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mMinDim(p.min_dim),
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mMaxDim(p.max_dim),
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mAutoResize(p.auto_resize),
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mUserResize(p.user_resize),
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mCollapsed(FALSE),
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mCollapseAmt(0.f),
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mVisibleAmt(1.f), // default to fully visible
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mResizeBar(NULL)
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{
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// panels initialized as hidden should not start out partially visible
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if (!getVisible())
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{
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mVisibleAmt = 0.f;
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}
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}
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void LLLayoutPanel::initFromParams(const Params& p)
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{
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LLPanel::initFromParams(p);
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setFollowsNone();
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}
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LLLayoutPanel::~LLLayoutPanel()
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{
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// probably not necessary, but...
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delete mResizeBar;
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mResizeBar = NULL;
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}
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F32 LLLayoutPanel::getCollapseFactor(LLLayoutStack::ELayoutOrientation orientation)
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{
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if (orientation == LLLayoutStack::HORIZONTAL)
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{
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F32 collapse_amt =
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clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, (F32)mMinDim / (F32)llmax(1, getRect().getWidth()));
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return mVisibleAmt * collapse_amt;
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}
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else
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{
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F32 collapse_amt =
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clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, llmin(1.f, (F32)mMinDim / (F32)llmax(1, getRect().getHeight())));
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return mVisibleAmt * collapse_amt;
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}
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}
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//
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// LLLayoutStack
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//
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LLLayoutStack::Params::Params()
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: orientation("orientation"),
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animate("animate", true),
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clip("clip", true),
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open_time_constant("open_time_constant", 0.02f),
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close_time_constant("close_time_constant", 0.03f),
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border_size("border_size", LLCachedControl<S32>(*LLUI::sSettingGroups["config"], "UIResizeBarHeight", 0))
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{
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name="stack";
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}
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LLLayoutStack::LLLayoutStack(const LLLayoutStack::Params& p)
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: LLView(p),
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mMinWidth(0),
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mMinHeight(0),
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mPanelSpacing(p.border_size),
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mOrientation(p.orientation),
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mAnimate(p.animate),
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mAnimatedThisFrame(false),
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mClip(p.clip),
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mOpenTimeConstant(p.open_time_constant),
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mCloseTimeConstant(p.close_time_constant)
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{}
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LLLayoutStack::~LLLayoutStack()
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{
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e_panel_list_t panels = mPanels; // copy list of panel pointers
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mPanels.clear(); // clear so that removeChild() calls don't cause trouble
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std::for_each(panels.begin(), panels.end(), DeletePointer());
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}
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void LLLayoutStack::draw()
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{
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updateLayout();
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e_panel_list_t::iterator panel_it;
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for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
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{
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// clip to layout rectangle, not bounding rectangle
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LLRect clip_rect = (*panel_it)->getRect();
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// scale clipping rectangle by visible amount
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if (mOrientation == HORIZONTAL)
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{
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clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor(mOrientation));
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}
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else
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{
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clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor(mOrientation));
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}
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LLPanel* panelp = (*panel_it);
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LLLocalClipRect clip(clip_rect, mClip);
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// only force drawing invisible children if visible amount is non-zero
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drawChild(panelp, 0, 0, !clip_rect.isEmpty());
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}
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mAnimatedThisFrame = false;
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}
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void LLLayoutStack::removeChild(LLView* view)
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{
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LLLayoutPanel* embedded_panelp = findEmbeddedPanel(dynamic_cast<LLPanel*>(view));
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if (embedded_panelp)
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{
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mPanels.erase(std::find(mPanels.begin(), mPanels.end(), embedded_panelp));
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delete embedded_panelp;
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}
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// need to update resizebars
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calcMinExtents();
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LLView::removeChild(view);
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}
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BOOL LLLayoutStack::postBuild()
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{
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updateLayout();
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return TRUE;
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}
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bool LLLayoutStack::addChild(LLView* child, S32 tab_group)
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{
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LLLayoutPanel* panelp = dynamic_cast<LLLayoutPanel*>(child);
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if (panelp)
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{
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mPanels.push_back(panelp);
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}
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return LLView::addChild(child, tab_group);
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}
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S32 LLLayoutStack::getDefaultHeight(S32 cur_height)
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{
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// if we are spanning our children (crude upward propagation of size)
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// then don't enforce our size on our children
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if (mOrientation == HORIZONTAL)
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{
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cur_height = llmax(mMinHeight, getRect().getHeight());
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}
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return cur_height;
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}
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S32 LLLayoutStack::getDefaultWidth(S32 cur_width)
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{
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// if we are spanning our children (crude upward propagation of size)
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// then don't enforce our size on our children
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if (mOrientation == VERTICAL)
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{
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cur_width = llmax(mMinWidth, getRect().getWidth());
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}
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return cur_width;
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}
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void LLLayoutStack::movePanel(LLPanel* panel_to_move, LLPanel* target_panel, bool move_to_front)
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{
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LLLayoutPanel* embedded_panel_to_move = findEmbeddedPanel(panel_to_move);
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LLLayoutPanel* embedded_target_panel = move_to_front ? *mPanels.begin() : findEmbeddedPanel(target_panel);
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if (!embedded_panel_to_move || !embedded_target_panel || embedded_panel_to_move == embedded_target_panel)
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{
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llwarns << "One of the panels was not found in stack or NULL was passed instead of valid panel" << llendl;
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return;
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}
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e_panel_list_t::iterator it = std::find(mPanels.begin(), mPanels.end(), embedded_panel_to_move);
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mPanels.erase(it);
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it = move_to_front ? mPanels.begin() : std::find(mPanels.begin(), mPanels.end(), embedded_target_panel);
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mPanels.insert(it, embedded_panel_to_move);
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}
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void LLLayoutStack::addPanel(LLLayoutPanel* panel, EAnimate animate)
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{
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addChild(panel);
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// panel starts off invisible (collapsed)
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if (animate == ANIMATE)
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{
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panel->mVisibleAmt = 0.f;
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panel->setVisible(TRUE);
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}
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}
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void LLLayoutStack::removePanel(LLPanel* panel)
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{
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removeChild(panel);
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}
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void LLLayoutStack::collapsePanel(LLPanel* panel, BOOL collapsed)
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{
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LLLayoutPanel* panel_container = findEmbeddedPanel(panel);
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if (!panel_container) return;
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panel_container->mCollapsed = collapsed;
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}
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void LLLayoutStack::updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize)
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{
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LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
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if (panel)
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{
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panel->mAutoResize = auto_resize;
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}
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}
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void LLLayoutStack::setPanelUserResize(const std::string& panel_name, BOOL user_resize)
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{
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LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
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if (panel)
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{
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panel->mUserResize = user_resize;
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}
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}
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bool LLLayoutStack::getPanelMinSize(const std::string& panel_name, S32* min_dimp)
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{
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LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
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if (panel)
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{
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if (min_dimp) *min_dimp = panel->mMinDim;
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}
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return NULL != panel;
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}
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bool LLLayoutStack::getPanelMaxSize(const std::string& panel_name, S32* max_dimp)
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{
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LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
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if (panel)
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{
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if (max_dimp) *max_dimp = panel->mMaxDim;
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}
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return NULL != panel;
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}
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static LLFastTimer::DeclareTimer FTM_UPDATE_LAYOUT("Update LayoutStacks");
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void LLLayoutStack::updateLayout(BOOL force_resize)
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{
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LLFastTimer ft(FTM_UPDATE_LAYOUT);
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static LLUICachedControl<S32> resize_bar_overlap ("UIResizeBarOverlap", 0);
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calcMinExtents();
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createResizeBars();
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// calculate current extents
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S32 total_width = 0;
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S32 total_height = 0;
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e_panel_list_t::iterator panel_it;
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for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
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{
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LLPanel* panelp = (*panel_it);
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if (panelp->getVisible())
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{
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if (mAnimate)
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{
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if (!mAnimatedThisFrame)
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{
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(*panel_it)->mVisibleAmt = lerp((*panel_it)->mVisibleAmt, 1.f, LLCriticalDamp::getInterpolant(mOpenTimeConstant));
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if ((*panel_it)->mVisibleAmt > 0.99f)
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{
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(*panel_it)->mVisibleAmt = 1.f;
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}
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}
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}
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else
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{
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(*panel_it)->mVisibleAmt = 1.f;
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}
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}
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else // not visible
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{
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if (mAnimate)
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{
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if (!mAnimatedThisFrame)
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{
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(*panel_it)->mVisibleAmt = lerp((*panel_it)->mVisibleAmt, 0.f, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
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if ((*panel_it)->mVisibleAmt < 0.001f)
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{
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(*panel_it)->mVisibleAmt = 0.f;
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}
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}
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}
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else
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{
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(*panel_it)->mVisibleAmt = 0.f;
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}
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}
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if ((*panel_it)->mCollapsed)
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{
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(*panel_it)->mCollapseAmt = lerp((*panel_it)->mCollapseAmt, 1.f, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
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}
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else
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{
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(*panel_it)->mCollapseAmt = lerp((*panel_it)->mCollapseAmt, 0.f, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
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}
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if (mOrientation == HORIZONTAL)
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{
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// enforce minimize size constraint by default
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if (panelp->getRect().getWidth() < (*panel_it)->mMinDim)
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{
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panelp->reshape((*panel_it)->mMinDim, panelp->getRect().getHeight());
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}
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total_width += llround(panelp->getRect().getWidth() * (*panel_it)->getCollapseFactor(mOrientation));
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// want n-1 panel gaps for n panels
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if (panel_it != mPanels.begin())
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{
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total_width += mPanelSpacing;
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}
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}
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else //VERTICAL
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{
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// enforce minimize size constraint by default
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if (panelp->getRect().getHeight() < (*panel_it)->mMinDim)
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{
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panelp->reshape(panelp->getRect().getWidth(), (*panel_it)->mMinDim);
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}
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total_height += llround(panelp->getRect().getHeight() * (*panel_it)->getCollapseFactor(mOrientation));
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if (panel_it != mPanels.begin())
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{
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total_height += mPanelSpacing;
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}
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}
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}
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S32 num_resizable_panels = 0;
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S32 shrink_headroom_available = 0;
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S32 shrink_headroom_total = 0;
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for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
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{
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// panels that are not fully visible do not count towards shrink headroom
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if ((*panel_it)->getCollapseFactor(mOrientation) < 1.f)
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{
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continue;
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}
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// if currently resizing a panel or the panel is flagged as not automatically resizing
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// only track total available headroom, but don't use it for automatic resize logic
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if ((*panel_it)->mResizeBar->hasMouseCapture()
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|| (!(*panel_it)->mAutoResize
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&& !force_resize))
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{
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if (mOrientation == HORIZONTAL)
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{
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shrink_headroom_total += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
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}
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else //VERTICAL
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{
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shrink_headroom_total += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
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}
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}
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else
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{
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num_resizable_panels++;
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if (mOrientation == HORIZONTAL)
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{
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shrink_headroom_available += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
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shrink_headroom_total += (*panel_it)->getRect().getWidth() - (*panel_it)->mMinDim;
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}
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else //VERTICAL
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{
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shrink_headroom_available += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
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shrink_headroom_total += (*panel_it)->getRect().getHeight() - (*panel_it)->mMinDim;
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}
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}
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}
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// calculate how many pixels need to be distributed among layout panels
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// positive means panels need to grow, negative means shrink
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S32 pixels_to_distribute;
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if (mOrientation == HORIZONTAL)
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{
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pixels_to_distribute = getRect().getWidth() - total_width;
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}
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else //VERTICAL
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{
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pixels_to_distribute = getRect().getHeight() - total_height;
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}
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// now we distribute the pixels...
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S32 cur_x = 0;
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S32 cur_y = getRect().getHeight();
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for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
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{
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LLPanel* panelp = (*panel_it);
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S32 cur_width = panelp->getRect().getWidth();
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S32 cur_height = panelp->getRect().getHeight();
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S32 new_width = cur_width;
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S32 new_height = cur_height;
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if (mOrientation == HORIZONTAL)
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{
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new_width = llmax((*panel_it)->mMinDim, new_width);
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}
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else
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{
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new_height = llmax((*panel_it)->mMinDim, new_height);
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}
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S32 delta_size = 0;
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// if panel can automatically resize (not animating, and resize flag set)...
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if ((*panel_it)->getCollapseFactor(mOrientation) == 1.f
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&& (force_resize || (*panel_it)->mAutoResize)
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&& !(*panel_it)->mResizeBar->hasMouseCapture())
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{
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if (mOrientation == HORIZONTAL)
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{
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// if we're shrinking
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if (pixels_to_distribute < 0)
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{
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// shrink proportionally to amount over minimum
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// so we can do this in one pass
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delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_width - (*panel_it)->mMinDim) / (F32)shrink_headroom_available)) : 0;
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shrink_headroom_available -= (cur_width - (*panel_it)->mMinDim);
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}
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else
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{
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// grow all elements equally
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delta_size = llround((F32)pixels_to_distribute / (F32)num_resizable_panels);
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num_resizable_panels--;
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}
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pixels_to_distribute -= delta_size;
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new_width = llmax((*panel_it)->mMinDim, cur_width + delta_size);
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}
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else
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{
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new_width = getDefaultWidth(new_width);
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}
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if (mOrientation == VERTICAL)
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{
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if (pixels_to_distribute < 0)
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{
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// shrink proportionally to amount over minimum
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// so we can do this in one pass
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delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_height - (*panel_it)->mMinDim) / (F32)shrink_headroom_available)) : 0;
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shrink_headroom_available -= (cur_height - (*panel_it)->mMinDim);
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}
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else
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{
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delta_size = llround((F32)pixels_to_distribute / (F32)num_resizable_panels);
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num_resizable_panels--;
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}
|
|
pixels_to_distribute -= delta_size;
|
|
new_height = llmax((*panel_it)->mMinDim, cur_height + delta_size);
|
|
}
|
|
else
|
|
{
|
|
new_height = getDefaultHeight(new_height);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (mOrientation == HORIZONTAL)
|
|
{
|
|
new_height = getDefaultHeight(new_height);
|
|
}
|
|
else // VERTICAL
|
|
{
|
|
new_width = getDefaultWidth(new_width);
|
|
}
|
|
}
|
|
|
|
// adjust running headroom count based on new sizes
|
|
shrink_headroom_total += delta_size;
|
|
|
|
LLRect panel_rect;
|
|
panel_rect.setLeftTopAndSize(cur_x, cur_y, new_width, new_height);
|
|
panelp->setShape(panel_rect);
|
|
|
|
LLRect resize_bar_rect = panel_rect;
|
|
if (mOrientation == HORIZONTAL)
|
|
{
|
|
resize_bar_rect.mLeft = panel_rect.mRight - resize_bar_overlap;
|
|
resize_bar_rect.mRight = panel_rect.mRight + mPanelSpacing + resize_bar_overlap;
|
|
}
|
|
else
|
|
{
|
|
resize_bar_rect.mTop = panel_rect.mBottom + resize_bar_overlap;
|
|
resize_bar_rect.mBottom = panel_rect.mBottom - mPanelSpacing - resize_bar_overlap;
|
|
}
|
|
(*panel_it)->mResizeBar->setRect(resize_bar_rect);
|
|
|
|
if (mOrientation == HORIZONTAL)
|
|
{
|
|
cur_x += llround(new_width * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
|
|
}
|
|
else //VERTICAL
|
|
{
|
|
cur_y -= llround(new_height * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
|
|
}
|
|
}
|
|
|
|
// update resize bars with new limits
|
|
LLLayoutPanel* last_resizeable_panel = NULL;
|
|
for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
LLPanel* panelp = (*panel_it);
|
|
|
|
if (mOrientation == HORIZONTAL)
|
|
{
|
|
(*panel_it)->mResizeBar->setResizeLimits(
|
|
(*panel_it)->mMinDim,
|
|
(*panel_it)->mMinDim + shrink_headroom_total);
|
|
}
|
|
else //VERTICAL
|
|
{
|
|
(*panel_it)->mResizeBar->setResizeLimits(
|
|
(*panel_it)->mMinDim,
|
|
(*panel_it)->mMinDim + shrink_headroom_total);
|
|
}
|
|
|
|
// toggle resize bars based on panel visibility, resizability, etc
|
|
BOOL resize_bar_enabled = panelp->getVisible() && (*panel_it)->mUserResize;
|
|
(*panel_it)->mResizeBar->setVisible(resize_bar_enabled);
|
|
|
|
if ((*panel_it)->mUserResize || (*panel_it)->mAutoResize)
|
|
{
|
|
last_resizeable_panel = (*panel_it);
|
|
}
|
|
}
|
|
|
|
// hide last resize bar as there is nothing past it
|
|
// resize bars need to be in between two resizable panels
|
|
if (last_resizeable_panel)
|
|
{
|
|
last_resizeable_panel->mResizeBar->setVisible(FALSE);
|
|
}
|
|
|
|
// not enough room to fit existing contents
|
|
if (force_resize == FALSE
|
|
// layout did not complete by reaching target position
|
|
&& ((mOrientation == VERTICAL && cur_y != -mPanelSpacing)
|
|
|| (mOrientation == HORIZONTAL && cur_x != getRect().getWidth() + mPanelSpacing)))
|
|
{
|
|
// do another layout pass with all stacked elements contributing
|
|
// even those that don't usually resize
|
|
llassert_always(force_resize == FALSE);
|
|
updateLayout(TRUE);
|
|
}
|
|
|
|
mAnimatedThisFrame = true;
|
|
} // end LLLayoutStack::updateLayout
|
|
|
|
|
|
LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
|
|
{
|
|
if (!panelp) return NULL;
|
|
|
|
e_panel_list_t::const_iterator panel_it;
|
|
for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
if ((*panel_it) == panelp)
|
|
{
|
|
return *panel_it;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
LLLayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
|
|
{
|
|
LLLayoutPanel* result = NULL;
|
|
|
|
for (e_panel_list_t::const_iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
LLLayoutPanel* p = *panel_it;
|
|
|
|
if (p->getName() == name)
|
|
{
|
|
result = p;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// Compute sum of min_width or min_height of children
|
|
void LLLayoutStack::calcMinExtents()
|
|
{
|
|
mMinWidth = 0;
|
|
mMinHeight = 0;
|
|
|
|
e_panel_list_t::iterator panel_it;
|
|
for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
if (mOrientation == HORIZONTAL)
|
|
{
|
|
mMinWidth += (*panel_it)->mMinDim;
|
|
if (panel_it != mPanels.begin())
|
|
{
|
|
mMinWidth += mPanelSpacing;
|
|
}
|
|
}
|
|
else //VERTICAL
|
|
{
|
|
mMinHeight += (*panel_it)->mMinDim;
|
|
if (panel_it != mPanels.begin())
|
|
{
|
|
mMinHeight += mPanelSpacing;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void LLLayoutStack::createResizeBars()
|
|
{
|
|
for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
LLLayoutPanel* lp = (*panel_it);
|
|
if (lp->mResizeBar == NULL)
|
|
{
|
|
LLResizeBar::Side side = (mOrientation == HORIZONTAL) ? LLResizeBar::RIGHT : LLResizeBar::BOTTOM;
|
|
LLRect resize_bar_rect = getRect();
|
|
|
|
LLResizeBar::Params resize_params;
|
|
resize_params.name("resize");
|
|
resize_params.resizing_view(lp);
|
|
resize_params.min_size(lp->mMinDim);
|
|
resize_params.side(side);
|
|
resize_params.snapping_enabled(false);
|
|
LLResizeBar* resize_bar = LLUICtrlFactory::create<LLResizeBar>(resize_params);
|
|
lp->mResizeBar = resize_bar;
|
|
LLView::addChild(resize_bar, 0);
|
|
|
|
// bring all resize bars to the front so that they are clickable even over the panels
|
|
// with a bit of overlap
|
|
for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
|
|
{
|
|
LLResizeBar* resize_barp = (*panel_it)->mResizeBar;
|
|
sendChildToFront(resize_barp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// update layout stack animations, etc. once per frame
|
|
// NOTE: we use this to size world view based on animating UI, *before* we draw the UI
|
|
// we might still need to call updateLayout during UI draw phase, in case UI elements
|
|
// are resizing themselves dynamically
|
|
//static
|
|
void LLLayoutStack::updateClass()
|
|
{
|
|
LLInstanceTrackerScopedGuard guard;
|
|
for (LLLayoutStack::instance_iter it = guard.beginInstances();
|
|
it != guard.endInstances();
|
|
++it)
|
|
{
|
|
it->updateLayout();
|
|
}
|
|
}
|