Refactor to centralize GUIButton styling/rendering code (#9090)

1 files changed, 149 insertions, 0 deletions

diff --git a/src/gui/guiButtonImage.cpp b/src/gui/guiButtonImage.cpp
new file mode 100644
index 000000000..8796b845d
--- /dev/null
+++ b/src/gui/guiButtonImage.cpp
@@ -0,0 +1,149 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program 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; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program 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 program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "guiButtonImage.h"
+
+#include "client/guiscalingfilter.h"
+#include "debug.h"
+#include "IGUIEnvironment.h"
+#include "IGUIImage.h"
+#include "IVideoDriver.h"
+#include "StyleSpec.h"
+
+using namespace irr;
+using namespace gui;
+
+GUIButtonImage::GUIButtonImage(gui::IGUIEnvironment *environment,
+		gui::IGUIElement *parent, s32 id, core::rect<s32> rectangle, bool noclip)
+	: GUIButton (environment, parent, id, rectangle, noclip)
+{
+	m_image = Environment->addImage(
+			core::rect<s32>(0,0,rectangle.getWidth(),rectangle.getHeight()), this);
+	m_image->setScaleImage(isScalingImage());
+	sendToBack(m_image);
+}
+
+bool GUIButtonImage::OnEvent(const SEvent& event)
+{
+	bool result = GUIButton::OnEvent(event);
+
+	EGUI_BUTTON_IMAGE_STATE imageState = getImageState(isPressed(), m_foreground_images);
+	video::ITexture *texture = m_foreground_images[(u32)imageState].Texture;
+	if (texture != nullptr)
+		m_image->setImage(texture);
+
+	return result;
+}
+
+void GUIButtonImage::setForegroundImage(EGUI_BUTTON_IMAGE_STATE state,
+		video::ITexture *image, const core::rect<s32> &sourceRect)
+{
+	if (state >= EGBIS_COUNT)
+		return;
+
+	if (image)
+		image->grab();
+
+	u32 stateIdx = (u32)state;
+	if (m_foreground_images[stateIdx].Texture)
+		m_foreground_images[stateIdx].Texture->drop();
+
+	m_foreground_images[stateIdx].Texture = image;
+	m_foreground_images[stateIdx].SourceRect = sourceRect;
+
+	EGUI_BUTTON_IMAGE_STATE imageState = getImageState(isPressed(), m_foreground_images);
+	if (imageState == stateIdx)
+		m_image->setImage(image);
+}
+
+void GUIButtonImage::setForegroundImage(video::ITexture *image)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_UP, image);
+}
+
+void GUIButtonImage::setForegroundImage(video::ITexture *image, const core::rect<s32> &pos)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_UP, image, pos);
+}
+
+void GUIButtonImage::setPressedForegroundImage(video::ITexture *image)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_DOWN, image);
+}
+
+void GUIButtonImage::setPressedForegroundImage(video::ITexture *image, const core::rect<s32> &pos)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_DOWN, image, pos);
+}
+
+void GUIButtonImage::setHoveredForegroundImage(video::ITexture *image)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_UP_MOUSEOVER, image);
+	setForegroundImage(gui::EGBIS_IMAGE_UP_FOCUSED_MOUSEOVER, image);
+}
+
+void GUIButtonImage::setHoveredForegroundImage(video::ITexture *image, const core::rect<s32> &pos)
+{
+	setForegroundImage(gui::EGBIS_IMAGE_UP_MOUSEOVER, image, pos);
+	setForegroundImage(gui::EGBIS_IMAGE_UP_FOCUSED_MOUSEOVER, image, pos);
+}
+
+void GUIButtonImage::setFromStyle(const StyleSpec &style, ISimpleTextureSource *tsrc)
+{
+	GUIButton::setFromStyle(style, tsrc);
+
+	video::IVideoDriver *driver = Environment->getVideoDriver();
+
+	if (style.isNotDefault(StyleSpec::FGIMG)) {
+		video::ITexture *texture = style.getTexture(StyleSpec::FGIMG, tsrc);
+		video::ITexture *hovered_texture = style.getTexture(StyleSpec::FGIMG_HOVERED, tsrc, texture);
+		video::ITexture *pressed_texture = style.getTexture(StyleSpec::FGIMG_PRESSED, tsrc, texture);
+
+		const core::position2di buttonCenter(AbsoluteRect.getCenter());
+		core::position2d<s32> geom(buttonCenter);
+
+		setForegroundImage(guiScalingImageButton(driver, texture, geom.X, geom.Y));
+		setHoveredForegroundImage(guiScalingImageButton(driver, hovered_texture, geom.X, geom.Y));
+		setPressedForegroundImage(guiScalingImageButton(driver, pressed_texture, geom.X, geom.Y));
+		setScaleImage(true);
+	}
+}
+
+void GUIButtonImage::setScaleImage(bool scaleImage)
+{
+	GUIButton::setScaleImage(scaleImage);
+	m_image->setScaleImage(scaleImage);
+}
+
+GUIButtonImage *GUIButtonImage::addButton(IGUIEnvironment *environment,
+		const core::rect<s32> &rectangle, IGUIElement *parent, s32 id,
+		const wchar_t *text, const wchar_t *tooltiptext)
+{
+	GUIButtonImage *button = new GUIButtonImage(environment,
+			parent ? parent : environment->getRootGUIElement(), id, rectangle);
+
+	if (text)
+		button->setText(text);
+
+	if (tooltiptext)
+		button->setToolTipText(tooltiptext);
+
+	button->drop();
+	return button;
+}