103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*
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src/popupbutton.cpp -- Button which launches a popup widget
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NanoGUI was developed by Wenzel Jakob <wenzel.jakob@epfl.ch>.
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The widget drawing code is based on the NanoVG demo application
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by Mikko Mononen.
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE.txt file.
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*/
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#include <nanogui/popupbutton.h>
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#include <nanogui/theme.h>
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#include <nanogui/opengl.h>
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#include <nanogui/serializer/core.h>
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NAMESPACE_BEGIN(nanogui)
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PopupButton::PopupButton(Widget *parent, const std::string &caption, int buttonIcon)
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: Button(parent, caption, buttonIcon) {
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mChevronIcon = mTheme->mPopupChevronRightIcon;
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setFlags(Flags::ToggleButton | Flags::PopupButton);
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Window *parentWindow = window();
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mPopup = new Popup(parentWindow->parent(), window());
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mPopup->setSize(Vector2i(320, 250));
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mPopup->setVisible(false);
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mIconExtraScale = 0.8f;// widget override
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}
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Vector2i PopupButton::preferredSize(NVGcontext *ctx) const {
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return Button::preferredSize(ctx) + Vector2i(15, 0);
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}
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void PopupButton::draw(NVGcontext* ctx) {
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if (!mEnabled && mPushed)
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mPushed = false;
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mPopup->setVisible(mPushed);
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Button::draw(ctx);
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if (mChevronIcon) {
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auto icon = utf8(mChevronIcon);
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NVGcolor textColor =
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mTextColor.w() == 0 ? mTheme->mTextColor : mTextColor;
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nvgFontSize(ctx, (mFontSize < 0 ? mTheme->mButtonFontSize : mFontSize) * icon_scale());
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nvgFontFace(ctx, "icons");
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nvgFillColor(ctx, mEnabled ? textColor : mTheme->mDisabledTextColor);
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nvgTextAlign(ctx, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE);
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float iw = nvgTextBounds(ctx, 0, 0, icon.data(), nullptr, nullptr);
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Vector2f iconPos(0, mPos.y() + mSize.y() * 0.5f - 1);
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if (mPopup->side() == Popup::Right)
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iconPos[0] = mPos.x() + mSize.x() - iw - 8;
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else
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iconPos[0] = mPos.x() + 8;
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nvgText(ctx, iconPos.x(), iconPos.y(), icon.data(), nullptr);
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}
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}
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void PopupButton::performLayout(NVGcontext *ctx) {
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Widget::performLayout(ctx);
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const Window *parentWindow = window();
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int posY = absolutePosition().y() - parentWindow->position().y() + mSize.y() /2;
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if (mPopup->side() == Popup::Right)
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mPopup->setAnchorPos(Vector2i(parentWindow->width() + 15, posY));
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else
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mPopup->setAnchorPos(Vector2i(0 - 15, posY));
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}
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void PopupButton::setSide(Popup::Side side) {
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if (mPopup->side() == Popup::Right &&
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mChevronIcon == mTheme->mPopupChevronRightIcon)
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setChevronIcon(mTheme->mPopupChevronLeftIcon);
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else if (mPopup->side() == Popup::Left &&
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mChevronIcon == mTheme->mPopupChevronLeftIcon)
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setChevronIcon(mTheme->mPopupChevronRightIcon);
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mPopup->setSide(side);
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}
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void PopupButton::save(Serializer &s) const {
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Button::save(s);
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s.set("chevronIcon", mChevronIcon);
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}
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bool PopupButton::load(Serializer &s) {
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if (!Button::load(s))
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return false;
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if (!s.get("chevronIcon", mChevronIcon))
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return false;
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return true;
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}
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NAMESPACE_END(nanogui)
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