/** * @file llscrollbar.cpp * @brief Scrollbar UI widget * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #include "linden_common.h" #include "llscrollbar.h" #include "llmath.h" #include "lltimer.h" #include "v3color.h" #include "llbutton.h" #include "llcriticaldamp.h" #include "llkeyboard.h" #include "llui.h" #include "llfocusmgr.h" #include "llwindow.h" #include "llcontrol.h" #include "llrender.h" #include "lluictrlfactory.h" static LLDefaultChildRegistry::Register<LLScrollbar> register_scrollbar("scroll_bar"); LLScrollbar::Params::Params() : orientation ("orientation", HORIZONTAL), doc_size ("doc_size", 0), doc_pos ("doc_pos", 0), page_size ("page_size", 0), step_size ("step_size", 1), thumb_image_vertical("thumb_image_vertical"), thumb_image_horizontal("thumb_image_horizontal"), track_image_vertical("track_image_vertical"), track_image_horizontal("track_image_horizontal"), track_color("track_color"), thumb_color("thumb_color"), thickness("thickness"), up_button("up_button"), down_button("down_button"), left_button("left_button"), right_button("right_button"), bg_visible("bg_visible", false), bg_color("bg_color", LLColor4::black) {} LLScrollbar::LLScrollbar(const Params & p) : LLUICtrl(p), mChangeCallback( p.change_callback() ), mOrientation( p.orientation ), mDocSize( p.doc_size ), mDocPos( p.doc_pos ), mPageSize( p.page_size ), mStepSize( p.step_size ), mDocChanged(FALSE), mDragStartX( 0 ), mDragStartY( 0 ), mHoverGlowStrength(0.15f), mCurGlowStrength(0.f), mTrackColor( p.track_color() ), mThumbColor ( p.thumb_color() ), mThumbImageV(p.thumb_image_vertical), mThumbImageH(p.thumb_image_horizontal), mTrackImageV(p.track_image_vertical), mTrackImageH(p.track_image_horizontal), mThickness(p.thickness.isProvided() ? p.thickness : LLUI::sSettingGroups["config"]->getS32("UIScrollbarSize")), mBGVisible(p.bg_visible), mBGColor(p.bg_color) { updateThumbRect(); // Page up and page down buttons LLRect line_up_rect; LLRect line_down_rect; if( VERTICAL == mOrientation ) { line_up_rect.setLeftTopAndSize( 0, getRect().getHeight(), mThickness, mThickness ); line_down_rect.setOriginAndSize( 0, 0, mThickness, mThickness ); } else // HORIZONTAL { line_up_rect.setOriginAndSize( 0, 0, mThickness, mThickness ); line_down_rect.setOriginAndSize( getRect().getWidth() - mThickness, 0, mThickness, mThickness ); } LLButton::Params up_btn(mOrientation == VERTICAL ? p.up_button : p.left_button); up_btn.name(std::string("Line Up")); up_btn.rect(line_up_rect); up_btn.click_callback.function(boost::bind(&LLScrollbar::onLineUpBtnPressed, this, _2)); up_btn.mouse_held_callback.function(boost::bind(&LLScrollbar::onLineUpBtnPressed, this, _2)); up_btn.tab_stop(false); up_btn.follows.flags = (mOrientation == VERTICAL ? (FOLLOWS_RIGHT | FOLLOWS_TOP) : (FOLLOWS_LEFT | FOLLOWS_BOTTOM)); addChild(LLUICtrlFactory::create<LLButton>(up_btn)); LLButton::Params down_btn(mOrientation == VERTICAL ? p.down_button : p.right_button); down_btn.name(std::string("Line Down")); down_btn.rect(line_down_rect); down_btn.follows.flags(FOLLOWS_RIGHT|FOLLOWS_BOTTOM); down_btn.click_callback.function(boost::bind(&LLScrollbar::onLineDownBtnPressed, this, _2)); down_btn.mouse_held_callback.function(boost::bind(&LLScrollbar::onLineDownBtnPressed, this, _2)); down_btn.tab_stop(false); addChild(LLUICtrlFactory::create<LLButton>(down_btn)); } LLScrollbar::~LLScrollbar() { // Children buttons killed by parent class } void LLScrollbar::setDocParams( S32 size, S32 pos ) { mDocSize = size; setDocPos(pos); mDocChanged = TRUE; updateThumbRect(); } // returns true if document position really changed bool LLScrollbar::setDocPos(S32 pos, BOOL update_thumb) { pos = llclamp(pos, 0, getDocPosMax()); if (pos != mDocPos) { mDocPos = pos; mDocChanged = TRUE; if( mChangeCallback ) { mChangeCallback( mDocPos, this ); } if( update_thumb ) { updateThumbRect(); } return true; } return false; } void LLScrollbar::setDocSize(S32 size) { if (size != mDocSize) { mDocSize = size; setDocPos(mDocPos); mDocChanged = TRUE; updateThumbRect(); } } void LLScrollbar::setPageSize( S32 page_size ) { if (page_size != mPageSize) { mPageSize = page_size; setDocPos(mDocPos); mDocChanged = TRUE; updateThumbRect(); } } BOOL LLScrollbar::isAtBeginning() { return mDocPos == 0; } BOOL LLScrollbar::isAtEnd() { return mDocPos == getDocPosMax(); } void LLScrollbar::updateThumbRect() { // llassert( 0 <= mDocSize ); // llassert( 0 <= mDocPos && mDocPos <= getDocPosMax() ); const S32 THUMB_MIN_LENGTH = 16; S32 window_length = (mOrientation == LLScrollbar::HORIZONTAL) ? getRect().getWidth() : getRect().getHeight(); S32 thumb_bg_length = llmax(0, window_length - 2 * mThickness); S32 visible_lines = llmin( mDocSize, mPageSize ); S32 thumb_length = mDocSize ? llmin(llmax( visible_lines * thumb_bg_length / mDocSize, THUMB_MIN_LENGTH), thumb_bg_length) : thumb_bg_length; S32 variable_lines = mDocSize - visible_lines; if( mOrientation == LLScrollbar::VERTICAL ) { S32 thumb_start_max = thumb_bg_length + mThickness; S32 thumb_start_min = mThickness + THUMB_MIN_LENGTH; S32 thumb_start = variable_lines ? llmin( llmax(thumb_start_max - (mDocPos * (thumb_bg_length - thumb_length)) / variable_lines, thumb_start_min), thumb_start_max ) : thumb_start_max; mThumbRect.mLeft = 0; mThumbRect.mTop = thumb_start; mThumbRect.mRight = mThickness; mThumbRect.mBottom = thumb_start - thumb_length; } else { // Horizontal S32 thumb_start_max = thumb_bg_length + mThickness - thumb_length; S32 thumb_start_min = mThickness; S32 thumb_start = variable_lines ? llmin(llmax( thumb_start_min + (mDocPos * (thumb_bg_length - thumb_length)) / variable_lines, thumb_start_min), thumb_start_max ) : thumb_start_min; mThumbRect.mLeft = thumb_start; mThumbRect.mTop = mThickness; mThumbRect.mRight = thumb_start + thumb_length; mThumbRect.mBottom = 0; } } BOOL LLScrollbar::handleMouseDown(S32 x, S32 y, MASK mask) { // Check children first BOOL handled_by_child = LLView::childrenHandleMouseDown(x, y, mask) != NULL; if( !handled_by_child ) { if( mThumbRect.pointInRect(x,y) ) { // Start dragging the thumb // No handler needed for focus lost since this clas has no state that depends on it. gFocusMgr.setMouseCapture( this ); mDragStartX = x; mDragStartY = y; mOrigRect.mTop = mThumbRect.mTop; mOrigRect.mBottom = mThumbRect.mBottom; mOrigRect.mLeft = mThumbRect.mLeft; mOrigRect.mRight = mThumbRect.mRight; mLastDelta = 0; } else { if( ( (LLScrollbar::VERTICAL == mOrientation) && (mThumbRect.mTop < y) ) || ( (LLScrollbar::HORIZONTAL == mOrientation) && (x < mThumbRect.mLeft) ) ) { // Page up pageUp(0); } else if( ( (LLScrollbar::VERTICAL == mOrientation) && (y < mThumbRect.mBottom) ) || ( (LLScrollbar::HORIZONTAL == mOrientation) && (mThumbRect.mRight < x) ) ) { // Page down pageDown(0); } } } return TRUE; } BOOL LLScrollbar::handleHover(S32 x, S32 y, MASK mask) { // Note: we don't bother sending the event to the children (the arrow buttons) // because they'll capture the mouse whenever they need hover events. BOOL handled = FALSE; if( hasMouseCapture() ) { S32 height = getRect().getHeight(); S32 width = getRect().getWidth(); if( VERTICAL == mOrientation ) { // S32 old_pos = mThumbRect.mTop; S32 delta_pixels = y - mDragStartY; if( mOrigRect.mBottom + delta_pixels < mThickness ) { delta_pixels = mThickness - mOrigRect.mBottom - 1; } else if( mOrigRect.mTop + delta_pixels > height - mThickness ) { delta_pixels = height - mThickness - mOrigRect.mTop + 1; } mThumbRect.mTop = mOrigRect.mTop + delta_pixels; mThumbRect.mBottom = mOrigRect.mBottom + delta_pixels; S32 thumb_length = mThumbRect.getHeight(); S32 thumb_track_length = height - 2 * mThickness; if( delta_pixels != mLastDelta || mDocChanged) { // Note: delta_pixels increases as you go up. mDocPos increases down (line 0 is at the top of the page). S32 usable_track_length = thumb_track_length - thumb_length; if( 0 < usable_track_length ) { S32 variable_lines = getDocPosMax(); S32 pos = mThumbRect.mTop; F32 ratio = F32(pos - mThickness - thumb_length) / usable_track_length; S32 new_pos = llclamp( S32(variable_lines - ratio * variable_lines + 0.5f), 0, variable_lines ); // Note: we do not call updateThumbRect() here. Instead we let the thumb and the document go slightly // out of sync (less than a line's worth) to make the thumb feel responsive. changeLine( new_pos - mDocPos, FALSE ); } } mLastDelta = delta_pixels; } else { // Horizontal // S32 old_pos = mThumbRect.mLeft; S32 delta_pixels = x - mDragStartX; if( mOrigRect.mLeft + delta_pixels < mThickness ) { delta_pixels = mThickness - mOrigRect.mLeft - 1; } else if( mOrigRect.mRight + delta_pixels > width - mThickness ) { delta_pixels = width - mThickness - mOrigRect.mRight + 1; } mThumbRect.mLeft = mOrigRect.mLeft + delta_pixels; mThumbRect.mRight = mOrigRect.mRight + delta_pixels; S32 thumb_length = mThumbRect.getWidth(); S32 thumb_track_length = width - 2 * mThickness; if( delta_pixels != mLastDelta || mDocChanged) { // Note: delta_pixels increases as you go up. mDocPos increases down (line 0 is at the top of the page). S32 usable_track_length = thumb_track_length - thumb_length; if( 0 < usable_track_length ) { S32 variable_lines = getDocPosMax(); S32 pos = mThumbRect.mLeft; F32 ratio = F32(pos - mThickness) / usable_track_length; S32 new_pos = llclamp( S32(ratio * variable_lines + 0.5f), 0, variable_lines); // Note: we do not call updateThumbRect() here. Instead we let the thumb and the document go slightly // out of sync (less than a line's worth) to make the thumb feel responsive. changeLine( new_pos - mDocPos, FALSE ); } } mLastDelta = delta_pixels; } getWindow()->setCursor(UI_CURSOR_ARROW); LL_DEBUGS("UserInput") << "hover handled by " << getName() << " (active)" << LL_ENDL; handled = TRUE; } else { handled = childrenHandleHover( x, y, mask ) != NULL; } // Opaque if( !handled ) { getWindow()->setCursor(UI_CURSOR_ARROW); LL_DEBUGS("UserInput") << "hover handled by " << getName() << " (inactive)" << LL_ENDL; handled = TRUE; } mDocChanged = FALSE; return handled; } // end handleHover BOOL LLScrollbar::handleScrollWheel(S32 x, S32 y, S32 clicks) { BOOL handled = changeLine( clicks * mStepSize, TRUE ); return handled; } BOOL LLScrollbar::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop, EDragAndDropType cargo_type, void *cargo_data, EAcceptance *accept, std::string &tooltip_msg) { // enable this to get drag and drop to control scrollbars //if (!drop) //{ // //TODO: refactor this // S32 variable_lines = getDocPosMax(); // S32 pos = (VERTICAL == mOrientation) ? y : x; // S32 thumb_length = (VERTICAL == mOrientation) ? mThumbRect.getHeight() : mThumbRect.getWidth(); // S32 thumb_track_length = (VERTICAL == mOrientation) ? (getRect().getHeight() - 2 * SCROLLBAR_SIZE) : (getRect().getWidth() - 2 * SCROLLBAR_SIZE); // S32 usable_track_length = thumb_track_length - thumb_length; // F32 ratio = (VERTICAL == mOrientation) ? F32(pos - SCROLLBAR_SIZE - thumb_length) / usable_track_length // : F32(pos - SCROLLBAR_SIZE) / usable_track_length; // S32 new_pos = (VERTICAL == mOrientation) ? llclamp( S32(variable_lines - ratio * variable_lines + 0.5f), 0, variable_lines ) // : llclamp( S32(ratio * variable_lines + 0.5f), 0, variable_lines ); // changeLine( new_pos - mDocPos, TRUE ); //} //return TRUE; return FALSE; } BOOL LLScrollbar::handleMouseUp(S32 x, S32 y, MASK mask) { BOOL handled = FALSE; if( hasMouseCapture() ) { gFocusMgr.setMouseCapture( NULL ); handled = TRUE; } else { // Opaque, so don't just check children handled = LLView::handleMouseUp( x, y, mask ); } return handled; } BOOL LLScrollbar::handleDoubleClick(S32 x, S32 y, MASK mask) { // just treat a double click as a second click return handleMouseDown(x, y, mask); } void LLScrollbar::reshape(S32 width, S32 height, BOOL called_from_parent) { if (width == getRect().getWidth() && height == getRect().getHeight()) return; LLView::reshape( width, height, called_from_parent ); LLButton* up_button = getChild<LLButton>("Line Up"); LLButton* down_button = getChild<LLButton>("Line Down"); if (mOrientation == VERTICAL) { up_button->reshape(up_button->getRect().getWidth(), llmin(getRect().getHeight() / 2, mThickness)); down_button->reshape(down_button->getRect().getWidth(), llmin(getRect().getHeight() / 2, mThickness)); up_button->setOrigin(up_button->getRect().mLeft, getRect().getHeight() - up_button->getRect().getHeight()); } else { up_button->reshape(llmin(getRect().getWidth() / 2, mThickness), up_button->getRect().getHeight()); down_button->reshape(llmin(getRect().getWidth() / 2, mThickness), down_button->getRect().getHeight()); down_button->setOrigin(getRect().getWidth() - down_button->getRect().getWidth(), down_button->getRect().mBottom); } updateThumbRect(); } void LLScrollbar::draw() { if (!getRect().isValid()) return; if(mBGVisible) { gl_rect_2d(getLocalRect(), mBGColor.get(), TRUE); } S32 local_mouse_x; S32 local_mouse_y; LLUI::getMousePositionLocal(this, &local_mouse_x, &local_mouse_y); BOOL other_captor = gFocusMgr.getMouseCapture() && gFocusMgr.getMouseCapture() != this; BOOL hovered = getEnabled() && !other_captor && (hasMouseCapture() || mThumbRect.pointInRect(local_mouse_x, local_mouse_y)); if (hovered) { mCurGlowStrength = lerp(mCurGlowStrength, mHoverGlowStrength, LLSmoothInterpolation::getInterpolant(0.05f)); } else { mCurGlowStrength = lerp(mCurGlowStrength, 0.f, LLSmoothInterpolation::getInterpolant(0.05f)); } // Draw background and thumb. if ( ( mOrientation == VERTICAL&&(mThumbImageV.isNull() || mThumbImageH.isNull()) ) || (mOrientation == HORIZONTAL&&(mTrackImageH.isNull() || mTrackImageV.isNull()) )) { gl_rect_2d(mOrientation == HORIZONTAL ? mThickness : 0, mOrientation == VERTICAL ? getRect().getHeight() - 2 * mThickness : getRect().getHeight(), mOrientation == HORIZONTAL ? getRect().getWidth() - 2 * mThickness : getRect().getWidth(), mOrientation == VERTICAL ? mThickness : 0, mTrackColor.get(), TRUE); gl_rect_2d(mThumbRect, mThumbColor.get(), TRUE); } else { // Thumb LLRect outline_rect = mThumbRect; outline_rect.stretch(2); // Background if(mOrientation == HORIZONTAL) { mTrackImageH->drawSolid(mThickness //S32 x , 0 //S32 y , getRect().getWidth() - 2 * mThickness //S32 width , getRect().getHeight() //S32 height , mTrackColor.get()); //const LLColor4& color if (gFocusMgr.getKeyboardFocus() == this) { mTrackImageH->draw(outline_rect, gFocusMgr.getFocusColor()); } mThumbImageH->draw(mThumbRect, mThumbColor.get()); if (mCurGlowStrength > 0.01f) { gGL.setSceneBlendType(LLRender::BT_ADD_WITH_ALPHA); mThumbImageH->drawSolid(mThumbRect, LLColor4(1.f, 1.f, 1.f, mCurGlowStrength)); gGL.setSceneBlendType(LLRender::BT_ALPHA); } } else if(mOrientation == VERTICAL) { mTrackImageV->drawSolid( 0 //S32 x , mThickness //S32 y , getRect().getWidth() //S32 width , getRect().getHeight() - 2 * mThickness //S32 height , mTrackColor.get()); //const LLColor4& color if (gFocusMgr.getKeyboardFocus() == this) { mTrackImageV->draw(outline_rect, gFocusMgr.getFocusColor()); } mThumbImageV->draw(mThumbRect, mThumbColor.get()); if (mCurGlowStrength > 0.01f) { gGL.setSceneBlendType(LLRender::BT_ADD_WITH_ALPHA); mThumbImageV->drawSolid(mThumbRect, LLColor4(1.f, 1.f, 1.f, mCurGlowStrength)); gGL.setSceneBlendType(LLRender::BT_ALPHA); } } } // Draw children LLView::draw(); } // end draw bool LLScrollbar::changeLine( S32 delta, BOOL update_thumb ) { return setDocPos(mDocPos + delta, update_thumb); } void LLScrollbar::setValue(const LLSD& value) { setDocPos((S32) value.asInteger()); } BOOL LLScrollbar::handleKeyHere(KEY key, MASK mask) { BOOL handled = FALSE; switch( key ) { case KEY_HOME: setDocPos( 0 ); handled = TRUE; break; case KEY_END: setDocPos( getDocPosMax() ); handled = TRUE; break; case KEY_DOWN: setDocPos( getDocPos() + mStepSize ); handled = TRUE; break; case KEY_UP: setDocPos( getDocPos() - mStepSize ); handled = TRUE; break; case KEY_PAGE_DOWN: pageDown(1); break; case KEY_PAGE_UP: pageUp(1); break; } return handled; } void LLScrollbar::pageUp(S32 overlap) { if (mDocSize > mPageSize) { changeLine( -(mPageSize - overlap), TRUE ); } } void LLScrollbar::pageDown(S32 overlap) { if (mDocSize > mPageSize) { changeLine( mPageSize - overlap, TRUE ); } } void LLScrollbar::onLineUpBtnPressed( const LLSD& data ) { changeLine( -mStepSize, TRUE ); } void LLScrollbar::onLineDownBtnPressed( const LLSD& data ) { changeLine( mStepSize, TRUE ); } void LLScrollbar::setThickness(S32 thickness) { mThickness = thickness < 0 ? LLUI::sSettingGroups["config"]->getS32("UIScrollbarSize") : thickness; }