llsplitbutton.cpp
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上传日期:2021-03-01
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- /**
- * @file llsplitbutton.cpp
- * @brief LLSplitButton base class
- *
- * $LicenseInfo:firstyear=2009&license=viewergpl$
- *
- * Copyright (c) 2009-2010, 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.
- * $/LicenseInfo$
- */
- // A control that consolidates several buttons as options
- #include "llviewerprecompiledheaders.h"
- #include "llsplitbutton.h"
- #include "llinitparam.h"
- #include "llpanel.h"
- #include "llfocusmgr.h"
- #include "llviewerwindow.h"
- #include "llrootview.h"
- S32 BUTTON_PAD = 2; //pad between buttons on an items panel
- static LLDefaultChildRegistry::Register<LLSplitButton> split_button("split_button");
- void LLSplitButton::ArrowPositionValues::declareValues()
- {
- declare("left", LEFT);
- declare("right", RIGHT);
- }
- LLSplitButton::ItemParams::ItemParams()
- {
- }
- LLSplitButton::Params::Params()
- : arrow_position("arrow_position", LEFT),
- items("item"),
- arrow_button("arrow_button"),
- items_panel("items_panel")
- {
- }
- void LLSplitButton::onFocusLost()
- {
- hideButtons();
- LLUICtrl::onFocusLost();
- }
- void LLSplitButton::setFocus(BOOL b)
- {
- LLUICtrl::setFocus(b);
- if (b)
- {
- if (mItemsPanel && mItemsPanel->getVisible())
- {
- mItemsPanel->setFocus(TRUE);
- }
- }
- }
- void LLSplitButton::setEnabled(BOOL enabled)
- {
- LLView::setEnabled(enabled);
- mArrowBtn->setEnabled(enabled);
- }
- void LLSplitButton::onArrowBtnDown()
- {
- if (!mItemsPanel->getVisible())
- {
- showButtons();
- setFocus(TRUE);
- if (mArrowBtn->hasMouseCapture() || mShownItem->hasMouseCapture())
- {
- gFocusMgr.setMouseCapture(this);
- }
- }
- else
- {
- hideButtons();
- }
- }
- void LLSplitButton::onHeldDownShownButton()
- {
- if (!mItemsPanel->getVisible()) onArrowBtnDown();
- }
- void LLSplitButton::onItemSelected(LLUICtrl* ctrl)
- {
- if (!ctrl) return;
- hideButtons();
- // call the callback if it exists
- if(!mSelectionCallback.empty())
- {
- mSelectionCallback(this, ctrl->getName());
- }
- gFocusMgr.setKeyboardFocus(NULL);
- }
- BOOL LLSplitButton::handleMouseUp(S32 x, S32 y, MASK mask)
- {
- gFocusMgr.setMouseCapture(NULL);
- if (mShownItem->parentPointInView(x, y))
- {
- onItemSelected(mShownItem);
- return TRUE;
- }
- for (std::list<LLButton*>::const_iterator it = mHidenItems.begin(); it != mHidenItems.end(); ++it)
- {
- LLButton* item = *it;
- S32 panel_x = 0;
- S32 panel_y = 0;
- localPointToOtherView(x, y, &panel_x, &panel_y, mItemsPanel);
- if (item->parentPointInView(panel_x, panel_y))
- {
- onItemSelected(item);
- return TRUE;
- }
- }
- return TRUE;
- }
- void LLSplitButton::showButtons()
- {
- mItemsPanel->setOrigin(0, getRect().getHeight());
- // register ourselves as a "top" control
- // effectively putting us into a special draw layer
- gFocusMgr.setTopCtrl(this);
- mItemsPanel->setFocus(TRUE);
- //push arrow button down and show the item buttons
- mArrowBtn->setToggleState(TRUE);
- mItemsPanel->setVisible(TRUE);
- setUseBoundingRect(TRUE);
- }
- void LLSplitButton::hideButtons()
- {
- mItemsPanel->setVisible(FALSE);
- mArrowBtn->setToggleState(FALSE);
- setUseBoundingRect(FALSE);
- if(gFocusMgr.getTopCtrl() == this)
- {
- gFocusMgr.setTopCtrl(NULL);
- }
- }
- // protected/private
- LLSplitButton::LLSplitButton(const LLSplitButton::Params& p)
- : LLUICtrl(p),
- mArrowBtn(NULL),
- mShownItem(NULL),
- mItemsPanel(NULL),
- mArrowPosition(p.arrow_position)
- {
- LLRect rc(p.rect);
- LLButton::Params arrow_params = p.arrow_button;
- S32 arrow_width = p.arrow_button.rect.width;
- //Default arrow rect values for LEFT arrow position
- S32 arrow_left = 0;
- S32 arrow_right = arrow_width;
- S32 btn_left = arrow_width;
- S32 btn_right = rc.getWidth();
- if (mArrowPosition == RIGHT)
- {
- arrow_left = rc.getWidth()- arrow_width;
- arrow_right = rc.getWidth();
- btn_left = 0;
- btn_right = arrow_left;
- }
- arrow_params.rect(LLRect(arrow_left, rc.getHeight(), arrow_right, 0));
- arrow_params.label("");
- arrow_params.mouse_down_callback.function(boost::bind(&LLSplitButton::onArrowBtnDown, this));
- mArrowBtn = LLUICtrlFactory::create<LLButton>(arrow_params);
- addChild(mArrowBtn);
- //a panel for hidden item buttons
- LLPanel::Params panel_params = p.items_panel;
- mItemsPanel= prepareItemsPanel(panel_params, p.items.numValidElements());
- addChild(mItemsPanel);
- LLInitParam::ParamIterator<ItemParams>::const_iterator it = p.items().begin();
- //processing shown item button
- mShownItem = prepareItemButton(*it);
- mShownItem->setHeldDownCallback(boost::bind(&LLSplitButton::onHeldDownShownButton, this));
- mShownItem->setMouseUpCallback(boost::bind(&LLSplitButton::onItemSelected, this, _1));
- mShownItem->setRect(LLRect(btn_left, rc.getHeight(), btn_right, 0));
- addChild(mShownItem);
- //processing hidden item buttons
- S32 item_top = mItemsPanel->getRect().getHeight();
- for (++it; it != p.items().end(); ++it)
- {
- LLButton* hidden_button = prepareItemButton(*it);
- hidden_button->setRect(LLRect(btn_left, item_top, btn_right, item_top - rc.getHeight()));
- hidden_button->setMouseDownCallback(boost::bind(&LLSplitButton::onItemSelected, this, _1));
- mHidenItems.push_back(hidden_button);
- mItemsPanel->addChild(hidden_button);
- //calculate next button's top
- item_top -= (rc.getHeight() + BUTTON_PAD);
- }
- setTopLostCallback(boost::bind(&LLSplitButton::hideButtons, this));
- }
- LLButton* LLSplitButton::prepareItemButton(LLButton::Params params)
- {
- params.label("");
- params.is_toggle(false);
- return LLUICtrlFactory::create<LLButton>(params);
- }
- LLPanel* LLSplitButton::prepareItemsPanel(LLPanel::Params params, S32 items_count)
- {
- S32 num_hiden_btns = items_count - 1;
- S32 panel_height = num_hiden_btns * (getRect().getHeight() + BUTTON_PAD);
- params.visible(false);
- params.rect.width(getRect().getWidth());
- params.rect.height(panel_height);
- return LLUICtrlFactory::create<LLPanel>(params);
- }