minetest/irr/include/IGUIButton.h
2024-03-26 21:39:02 +01:00

260 lines
11 KiB
C++

// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#pragma once
#include "IGUIElement.h"
namespace irr
{
namespace video
{
class ITexture;
} // end namespace video
namespace gui
{
class IGUIFont;
class IGUISpriteBank;
//! Current state of buttons used for drawing sprites.
//! Note that up to 3 states can be active at the same time:
//! EGBS_BUTTON_UP or EGBS_BUTTON_DOWN
//! EGBS_BUTTON_MOUSE_OVER or EGBS_BUTTON_MOUSE_OFF
//! EGBS_BUTTON_FOCUSED or EGBS_BUTTON_NOT_FOCUSED
enum EGUI_BUTTON_STATE
{
//! The button is not pressed.
EGBS_BUTTON_UP = 0,
//! The button is currently pressed down.
EGBS_BUTTON_DOWN,
//! The mouse cursor is over the button
EGBS_BUTTON_MOUSE_OVER,
//! The mouse cursor is not over the button
EGBS_BUTTON_MOUSE_OFF,
//! The button has the focus
EGBS_BUTTON_FOCUSED,
//! The button doesn't have the focus
EGBS_BUTTON_NOT_FOCUSED,
//! The button is disabled All other states are ignored in that case.
EGBS_BUTTON_DISABLED,
//! not used, counts the number of enumerated items
EGBS_COUNT
};
//! Names for gui button state icons
const c8 *const GUIButtonStateNames[EGBS_COUNT + 1] = {
"buttonUp",
"buttonDown",
"buttonMouseOver",
"buttonMouseOff",
"buttonFocused",
"buttonNotFocused",
"buttonDisabled",
0, // count
};
//! State of buttons used for drawing texture images.
//! Note that only a single state is active at a time
//! Also when no image is defined for a state it will use images from another state
//! and if that state is not set from the replacement for that,etc.
//! So in many cases setting EGBIS_IMAGE_UP and EGBIS_IMAGE_DOWN is sufficient.
enum EGUI_BUTTON_IMAGE_STATE
{
//! When no other states have images they will all use this one.
EGBIS_IMAGE_UP,
//! When not set EGBIS_IMAGE_UP is used.
EGBIS_IMAGE_UP_MOUSEOVER,
//! When not set EGBIS_IMAGE_UP_MOUSEOVER is used.
EGBIS_IMAGE_UP_FOCUSED,
//! When not set EGBIS_IMAGE_UP_FOCUSED is used.
EGBIS_IMAGE_UP_FOCUSED_MOUSEOVER,
//! When not set EGBIS_IMAGE_UP is used.
EGBIS_IMAGE_DOWN,
//! When not set EGBIS_IMAGE_DOWN is used.
EGBIS_IMAGE_DOWN_MOUSEOVER,
//! When not set EGBIS_IMAGE_DOWN_MOUSEOVER is used.
EGBIS_IMAGE_DOWN_FOCUSED,
//! When not set EGBIS_IMAGE_DOWN_FOCUSED is used.
EGBIS_IMAGE_DOWN_FOCUSED_MOUSEOVER,
//! When not set EGBIS_IMAGE_UP or EGBIS_IMAGE_DOWN are used (depending on button state).
EGBIS_IMAGE_DISABLED,
//! not used, counts the number of enumerated items
EGBIS_COUNT
};
//! Names for gui button image states
const c8 *const GUIButtonImageStateNames[EGBIS_COUNT + 1] = {
"Image", // not "ImageUp" as it otherwise breaks serialization of old files
"ImageUpOver",
"ImageUpFocused",
"ImageUpFocusedOver",
"PressedImage", // not "ImageDown" as it otherwise breaks serialization of old files
"ImageDownOver",
"ImageDownFocused",
"ImageDownFocusedOver",
"ImageDisabled",
0, // count
};
//! GUI Button interface.
/** \par This element can create the following events of type EGUI_EVENT_TYPE:
\li EGET_BUTTON_CLICKED
*/
class IGUIButton : public IGUIElement
{
public:
//! constructor
IGUIButton(IGUIEnvironment *environment, IGUIElement *parent, s32 id, core::rect<s32> rectangle) :
IGUIElement(EGUIET_BUTTON, environment, parent, id, rectangle) {}
//! Sets another skin independent font.
/** If this is set to zero, the button uses the font of the skin.
\param font: New font to set. */
virtual void setOverrideFont(IGUIFont *font = 0) = 0;
//! Gets the override font (if any)
/** \return The override font (may be 0) */
virtual IGUIFont *getOverrideFont(void) const = 0;
//! Get the font which is used right now for drawing
/** Currently this is the override font when one is set and the
font of the active skin otherwise */
virtual IGUIFont *getActiveFont() const = 0;
//! Sets another color for the button text.
/** When set, this color is used instead of EGDC_BUTTON_TEXT/EGDC_GRAY_TEXT.
You don't need to call enableOverrideColor(true), that's done by this function.
If you want the the color of the skin back, call enableOverrideColor(false);
\param color: New color of the text. */
virtual void setOverrideColor(video::SColor color) = 0;
//! Gets the override color
/** \return: The override color */
virtual video::SColor getOverrideColor(void) const = 0;
//! Gets the currently used text color
/** Either a skin-color for the current state or the override color */
virtual video::SColor getActiveColor() const = 0;
//! Sets if the button text should use the override color or the color in the gui skin.
/** \param enable: If set to true, the override color, which can be set
with IGUIStaticText::setOverrideColor is used, otherwise the
EGDC_BUTTON_TEXT or EGDC_GRAY_TEXT color of the skin. */
virtual void enableOverrideColor(bool enable) = 0;
//! Checks if an override color is enabled
/** \return true if the override color is enabled, false otherwise */
virtual bool isOverrideColorEnabled(void) const = 0;
//! Sets an image which should be displayed on the button when it is in the given state.
/** Only one image-state can be active at a time. Images are drawn below sprites.
If a state is without image it will try to use images from other states as described
in ::EGUI_BUTTON_IMAGE_STATE.
Images are a little less flexible than sprites, but easier to use.
\param state: One of ::EGUI_BUTTON_IMAGE_STATE
\param image: Image to be displayed or NULL to remove the image
\param sourceRect: Source rectangle on the image texture. When width or height are 0 then the full texture-size is used (default). */
virtual void setImage(EGUI_BUTTON_IMAGE_STATE state, video::ITexture *image = 0, const core::rect<s32> &sourceRect = core::rect<s32>(0, 0, 0, 0)) = 0;
//! Sets an image which should be displayed on the button when it is in normal state.
/** This is identical to calling setImage(EGBIS_IMAGE_UP, image); and might be deprecated in future revisions.
\param image: Image to be displayed */
virtual void setImage(video::ITexture *image = 0) = 0;
//! Sets a background image for the button when it is in normal state.
/** This is identical to calling setImage(EGBIS_IMAGE_UP, image, sourceRect); and might be deprecated in future revisions.
\param image: Texture containing the image to be displayed
\param sourceRect: Position in the texture, where the image is located.
When width or height are 0 then the full texture-size is used */
virtual void setImage(video::ITexture *image, const core::rect<s32> &sourceRect) = 0;
//! Sets a background image for the button when it is in pressed state.
/** This is identical to calling setImage(EGBIS_IMAGE_DOWN, image); and might be deprecated in future revisions.
If no images is specified for the pressed state via
setPressedImage(), this image is also drawn in pressed state.
\param image: Image to be displayed */
virtual void setPressedImage(video::ITexture *image = 0) = 0;
//! Sets an image which should be displayed on the button when it is in pressed state.
/** This is identical to calling setImage(EGBIS_IMAGE_DOWN, image, sourceRect); and might be deprecated in future revisions.
\param image: Texture containing the image to be displayed
\param sourceRect: Position in the texture, where the image is located */
virtual void setPressedImage(video::ITexture *image, const core::rect<s32> &sourceRect) = 0;
//! Sets the sprite bank used by the button
/** NOTE: The spritebank itself is _not_ serialized so far. The sprites are serialized.
Which means after loading the gui you still have to set the spritebank manually. */
virtual void setSpriteBank(IGUISpriteBank *bank = 0) = 0;
//! Sets the animated sprite for a specific button state
/** Several sprites can be drawn at the same time.
Sprites can be animated.
Sprites are drawn above the images.
\param index: Number of the sprite within the sprite bank, use -1 for no sprite
\param state: State of the button to set the sprite for
\param index: The sprite number from the current sprite bank
\param color: The color of the sprite
\param loop: True if the animation should loop, false if not
\param scale: True if the sprite should scale to button size, false if not */
virtual void setSprite(EGUI_BUTTON_STATE state, s32 index,
video::SColor color = video::SColor(255, 255, 255, 255), bool loop = false, bool scale = false) = 0;
//! Get the sprite-index for the given state or -1 when no sprite is set
virtual s32 getSpriteIndex(EGUI_BUTTON_STATE state) const = 0;
//! Get the sprite color for the given state. Color is only used when a sprite is set.
virtual video::SColor getSpriteColor(EGUI_BUTTON_STATE state) const = 0;
//! Returns if the sprite in the given state does loop
virtual bool getSpriteLoop(EGUI_BUTTON_STATE state) const = 0;
//! Returns if the sprite in the given state is scaled
virtual bool getSpriteScale(EGUI_BUTTON_STATE state) const = 0;
//! Sets if the button should behave like a push button.
/** Which means it can be in two states: Normal or Pressed. With a click on the button,
the user can change the state of the button. */
virtual void setIsPushButton(bool isPushButton = true) = 0;
//! Sets the pressed state of the button if this is a pushbutton
virtual void setPressed(bool pressed = true) = 0;
//! Returns if the button is currently pressed
virtual bool isPressed() const = 0;
//! Sets if the alpha channel should be used for drawing background images on the button (default is false)
virtual void setUseAlphaChannel(bool useAlphaChannel = true) = 0;
//! Returns if the alpha channel should be used for drawing background images on the button
virtual bool isAlphaChannelUsed() const = 0;
//! Returns whether the button is a push button
virtual bool isPushButton() const = 0;
//! Sets if the button should use the skin to draw its border and button face (default is true)
virtual void setDrawBorder(bool border = true) = 0;
//! Returns if the border and button face are being drawn using the skin
virtual bool isDrawingBorder() const = 0;
//! Sets if the button should scale the button images to fit
virtual void setScaleImage(bool scaleImage = true) = 0;
//! Checks whether the button scales the used images
virtual bool isScalingImage() const = 0;
//! Get if the shift key was pressed in last EGET_BUTTON_CLICKED event
/** Generated together with event, so info is available in the event-receiver. */
virtual bool getClickShiftState() const = 0;
//! Get if the control key was pressed in last EGET_BUTTON_CLICKED event
/** Generated together with event, so info is available in the event-receiver. */
virtual bool getClickControlState() const = 0;
};
} // end namespace gui
} // end namespace irr