path: root/indra/llui/llbutton.h

/**
 * @file llbutton.h
 * @brief Header for buttons
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#ifndef LL_LLBUTTON_H
#define LL_LLBUTTON_H

#include "lluuid.h"
#include "llbadgeowner.h"
#include "llcontrol.h"
#include "llflashtimer.h"
#include "lluictrl.h"
#include "v4color.h"
#include "llframetimer.h"
#include "lluiimage.h"
#include "lluistring.h"

//
// Constants
//

// PLEASE please use these "constants" when building your own buttons.
extern S32  LLBUTTON_H_PAD;
extern S32  BTN_HEIGHT_SMALL;
extern S32  BTN_HEIGHT;
extern S32  BTN_DROP_SHADOW;

//
// Helpful functions
//
S32 round_up(S32 grid, S32 value);


class LLUICtrlFactory;
class LLFontGL;
class LLFontVertexBuffer;

//
// Classes
//

class LLButton
: public LLUICtrl, public LLBadgeOwner
, public ll::ui::SearchableControl
{
public:
    struct Params
    :   public LLInitParam::Block<Params, LLUICtrl::Params>
    {
        // text label
        Optional<std::string>   label_selected;
        Optional<bool>          label_shadow;
        Optional<bool>          auto_resize;
        Optional<bool>          use_ellipses;
        Optional<bool>          use_font_color;

        // images
        Optional<LLUIImage*>    image_unselected,
                                image_selected,
                                image_hover_selected,
                                image_hover_unselected,
                                image_disabled_selected,
                                image_disabled,
                                image_flash,
                                image_pressed,
                                image_pressed_selected,
                                image_overlay;

        Optional<std::string>   image_overlay_alignment;

        // colors
        Optional<LLUIColor>     label_color,
                                label_color_selected,
                                label_color_disabled,
                                label_color_disabled_selected,
                                image_color,
                                image_color_disabled,
                                image_overlay_color,
                                image_overlay_selected_color,
                                image_overlay_disabled_color,
                                flash_color;

        // layout
        Optional<S32>           pad_right;
        Optional<S32>           pad_left;
        Optional<S32>           pad_bottom; // under text label

        //image overlay paddings
        Optional<S32>           image_top_pad;
        Optional<S32>           image_bottom_pad;

        /**
         * Space between image_overlay and label
         */
        Optional<S32>           imgoverlay_label_space;

        // callbacks
        Optional<CommitCallbackParam>   click_callback, // alias -> commit_callback
                                        mouse_down_callback,
                                        mouse_up_callback,
                                        mouse_held_callback;

        // misc
        Optional<bool>          is_toggle,
                                scale_image,
                                commit_on_return,
                                commit_on_capture_lost,
                                display_pressed_state;

        Optional<F32>               hover_glow_amount;
        Optional<TimeIntervalParam> held_down_delay;

        Optional<bool>              use_draw_context_alpha;

        Optional<LLBadge::Params>   badge;

        Optional<bool>              handle_right_mouse;

        Optional<bool>              button_flash_enable;
        Optional<S32>               button_flash_count;
        Optional<F32>               button_flash_rate;

        Params();
    };

protected:
    friend class LLUICtrlFactory;
    LLButton(const Params&);

public:

    ~LLButton();
    // For backward compatability only
    typedef boost::function<void(void*)> button_callback_t;

    void            addImageAttributeToXML(LLXMLNodePtr node, const std::string& imageName,
                                        const LLUUID&   imageID,const std::string&  xmlTagName) const;
    virtual bool    handleUnicodeCharHere(llwchar uni_char) override;
    virtual bool    handleKeyHere(KEY key, MASK mask) override;
    virtual bool    handleMouseDown(S32 x, S32 y, MASK mask) override;
    virtual bool    handleMouseUp(S32 x, S32 y, MASK mask) override;
    virtual bool    handleHover(S32 x, S32 y, MASK mask) override;
    virtual bool    handleRightMouseDown(S32 x, S32 y, MASK mask) override;
    virtual bool    handleRightMouseUp(S32 x, S32 y, MASK mask) override;
    virtual bool    handleDoubleClick(S32 x, S32 y, MASK mask) override;
    virtual void    draw() override;
    /*virtual*/ bool postBuild()  override;

    void onVisibilityChange(bool visible) override;
    void dirtyRect() override;

    virtual void    onMouseLeave(S32 x, S32 y, MASK mask) override;
    virtual void    onMouseCaptureLost() override;

    virtual void    onCommit() override;

    void            setUnselectedLabelColor(const LLUIColor& c);
    void            setSelectedLabelColor(const LLUIColor& c);
    void            setUseEllipses(bool use_ellipses);
    void            setUseFontColor(bool use_font_color);


    boost::signals2::connection setClickedCallback(const CommitCallbackParam& cb);
    boost::signals2::connection setMouseDownCallback(const CommitCallbackParam& cb);
    boost::signals2::connection setMouseUpCallback(const CommitCallbackParam& cb);
    boost::signals2::connection setHeldDownCallback(const CommitCallbackParam& cb);

    boost::signals2::connection setClickedCallback( const commit_signal_t::slot_type& cb ); // mouse down and up within button
    boost::signals2::connection setMouseDownCallback( const commit_signal_t::slot_type& cb );
    boost::signals2::connection setMouseUpCallback( const commit_signal_t::slot_type& cb ); // mouse up, EVEN IF NOT IN BUTTON
    // Passes a 'count' parameter in the commit param payload, i.e. param["count"])
    boost::signals2::connection setHeldDownCallback( const commit_signal_t::slot_type& cb ); // Mouse button held down and in button


    // *TODO: Deprecate (for backwards compatability only)
    boost::signals2::connection setClickedCallback( button_callback_t cb, void* data );
    boost::signals2::connection setMouseDownCallback( button_callback_t cb, void* data );
    boost::signals2::connection setMouseUpCallback( button_callback_t cb, void* data );
    boost::signals2::connection setHeldDownCallback( button_callback_t cb, void* data );

    void            setHeldDownDelay( F32 seconds, S32 frames = 0)      { mHeldDownDelay = seconds; mHeldDownFrameDelay = frames; }

    F32             getHeldDownTime() const                             { return mMouseDownTimer.getElapsedTimeF32(); }

    bool            toggleState();
    bool            getToggleState() const;
    void            setToggleState(bool b);

    void            setHighlight(bool b);
    void            setFlashing( bool b, bool force_flashing = false );
    bool            getFlashing() const     { return mFlashing; }
    LLFlashTimer*   getFlashTimer() {return mFlashingTimer;}
    void            setFlashColor(const LLUIColor &color) { mFlashBgColor = color; };

    void            setHAlign( LLFontGL::HAlign align )     { mHAlign = align; }
    LLFontGL::HAlign getHAlign() const                      { return mHAlign; }
    void            setLeftHPad( S32 pad )                  { mLeftHPad = pad; }
    void            setRightHPad( S32 pad )                 { mRightHPad = pad; }

    void            setImageOverlayTopPad( S32 pad )            { mImageOverlayTopPad = pad; }
    S32             getImageOverlayTopPad() const               { return mImageOverlayTopPad; }
    void            setImageOverlayBottomPad( S32 pad )         { mImageOverlayBottomPad = pad; }
    S32             getImageOverlayBottomPad() const            { return mImageOverlayBottomPad; }

    const std::string   getLabelUnselected() const { return wstring_to_utf8str(mUnselectedLabel); }
    const std::string   getLabelSelected() const { return wstring_to_utf8str(mSelectedLabel); }

    void            setImageColor(const LLUIColor& c);
    /*virtual*/ void    setColor(const LLUIColor& c) override;

    void            setImages(const std::string &image_name, const std::string &selected_name);

    void            setDisabledImageColor(const LLUIColor& c)        { mDisabledImageColor = c; }

    void            setDisabledSelectedLabelColor( const LLUIColor& c )  { mDisabledSelectedLabelColor = c; }

    void            setImageOverlay(const std::string& image_name, LLFontGL::HAlign alignment = LLFontGL::HCENTER, const LLColor4& color = LLColor4::white);
    void            setImageOverlay(const LLUUID& image_id, LLFontGL::HAlign alignment = LLFontGL::HCENTER, const LLColor4& color = LLColor4::white);
    LLPointer<LLUIImage> getImageOverlay() { return mImageOverlay; }
    LLFontGL::HAlign getImageOverlayHAlign() const  { return mImageOverlayAlignment; }

    void            autoResize();   // resize with label of current btn state
    void            resize(const LLUIString& label); // resize with label input
    void            setLabel(const std::string& label);
    void            setLabel(const LLUIString& label);
    void            setLabel( const LLStringExplicit& label);
    virtual bool    setLabelArg( const std::string& key, const LLStringExplicit& text ) override;
    void            setLabelUnselected(const LLStringExplicit& label);
    void            setLabelSelected(const LLStringExplicit& label);
    void            setDisabledLabelColor(const LLUIColor& c);

    void            setFont(const LLFontGL* font);
    const LLFontGL* getFont() const override { return mGLFont; }
    const std::string& getText() const override { return getCurrentLabel().getString(); }

    S32             getLastDrawCharsCount() const { return mLastDrawCharsCount; }
    bool            labelIsTruncated() const;
    const LLUIString&   getCurrentLabel() const;

    void            setScaleImage(bool scale)           { mScaleImage = scale; }
    bool            getScaleImage() const               { return mScaleImage; }

    void            setDropShadowedText(bool b);

    void            setHoverGlowStrength(F32 strength) { mHoverGlowStrength = strength; }

    void            setImageUnselected(LLPointer<LLUIImage> image);
    void            setImageSelected(LLPointer<LLUIImage> image);
    void            setImageHoverSelected(LLPointer<LLUIImage> image);
    void            setImageHoverUnselected(LLPointer<LLUIImage> image);
    void            setImageDisabled(LLPointer<LLUIImage> image);
    void            setImageDisabledSelected(LLPointer<LLUIImage> image);
    void            setImageFlash(LLPointer<LLUIImage> image);
    void            setImagePressed(LLPointer<LLUIImage> image);

    void            setCommitOnReturn(bool commit) { mCommitOnReturn = commit; }
    bool            getCommitOnReturn() const { return mCommitOnReturn; }

    static void     toggleFloaterAndSetToggleState(LLUICtrl* ctrl, const LLSD& sdname);
    static void     setFloaterToggle(LLUICtrl* ctrl, const LLSD& sdname);
    static void     setDockableFloaterToggle(LLUICtrl* ctrl, const LLSD& sdname);
    static void     showHelp(LLUICtrl* ctrl, const LLSD& sdname);

    void        setForcePressedState(bool b) { mForcePressedState = b; }

    void        setAutoResize(bool auto_resize) { mAutoResize = auto_resize; }

protected:
    LLPointer<LLUIImage> getImageUnselected() const { return mImageUnselected; }
    LLPointer<LLUIImage> getImageSelected() const   { return mImageSelected; }
    void getOverlayImageSize(S32& overlay_width, S32& overlay_height);

    LLFrameTimer    mMouseDownTimer;
    bool            mNeedsHighlight;
    S32             mButtonFlashCount;
    F32             mButtonFlashRate;

    void            drawBorder(LLUIImage* imagep, const LLColor4& color, S32 size);
    void            resetMouseDownTimer();

    commit_signal_t*            mMouseDownSignal;
    commit_signal_t*            mMouseUpSignal;
    commit_signal_t*            mHeldDownSignal;

    S32                         mMouseDownFrame;
    S32                         mMouseHeldDownCount;    // Counter for parameter passed to held-down callback
    F32                         mHeldDownDelay;         // seconds, after which held-down callbacks get called
    S32                         mHeldDownFrameDelay;    // frames, after which held-down callbacks get called
    S32                         mLastDrawCharsCount;

    LLPointer<LLUIImage>        mImageOverlay;
    LLFontGL::HAlign            mImageOverlayAlignment;
    LLUIColor                   mImageOverlayColor;
    LLUIColor                   mImageOverlaySelectedColor;
    LLUIColor                   mImageOverlayDisabledColor;

    LLPointer<LLUIImage>        mImageUnselected;
    LLUIString                  mUnselectedLabel;
    LLUIColor                   mUnselectedLabelColor;

    LLPointer<LLUIImage>        mImageSelected;
    LLUIString                  mSelectedLabel;
    LLUIColor                   mSelectedLabelColor;

    LLPointer<LLUIImage>        mImageHoverSelected;

    LLPointer<LLUIImage>        mImageHoverUnselected;

    LLPointer<LLUIImage>        mImageDisabled;
    LLUIColor                   mDisabledLabelColor;

    LLPointer<LLUIImage>        mImageDisabledSelected;
    LLUIString                  mDisabledSelectedLabel;
    LLUIColor                   mDisabledSelectedLabelColor;

    LLPointer<LLUIImage>        mImagePressed;
    LLPointer<LLUIImage>        mImagePressedSelected;

    /* There are two ways an image can flash- by making changes in color according to flash_color attribute
       or by changing icon from current to the one specified in image_flash. Second way is used only if
       flash icon name is set in attributes(by default it isn't). First way is used otherwise. */
    LLPointer<LLUIImage>        mImageFlash;

    LLUIColor                   mFlashBgColor;

    LLUIColor                   mImageColor;
    LLUIColor                   mDisabledImageColor;

    bool                        mIsToggle;
    bool                        mScaleImage;

    bool                        mDropShadowedText;
    bool                        mAutoResize;
    bool                        mUseEllipses;
    bool                        mUseFontColor;
    bool                        mFlashing;

    LLFontGL::HAlign            mHAlign;
    S32                         mLeftHPad;
    S32                         mRightHPad;
    S32                         mBottomVPad;    // under text label

    S32                         mImageOverlayTopPad;
    S32                         mImageOverlayBottomPad;

    bool                        mUseDrawContextAlpha;

    /*
     * Space between image_overlay and label
     */
    S32                         mImgOverlayLabelSpace;

    F32                         mHoverGlowStrength;
    F32                         mCurGlowStrength;

    bool                        mCommitOnReturn;
    bool                        mCommitOnCaptureLost;
    bool                        mFadeWhenDisabled;
    bool                        mForcePressedState;
    bool                        mDisplayPressedState;

    LLFrameTimer                mFrameTimer;
    LLFlashTimer *              mFlashingTimer;
    bool                        mForceFlashing; // Stick flashing color even if button is pressed
    bool                        mHandleRightMouse;

private:
    const LLFontGL* mGLFont;
    LLFontVertexBuffer          mFontBuffer;

protected:
    virtual std::string _getSearchText() const override
    {
        return getLabelUnselected() + getToolTip();
    }
};

// Build time optimization, generate once in .cpp file
#ifndef LLBUTTON_CPP
extern template class LLButton* LLView::getChild<class LLButton>(
    std::string_view name, bool recurse) const;
#endif

#endif  // LL_LLBUTTON_H