ivec2 Button::preferredSize(NVGcontext * ctx) const
{
int fontSize = mFontSize == -1 ? mTheme->mButtonFontSize : mFontSize;
nvgFontSize(ctx, fontSize);
nvgFontFace(ctx, "sans-bold");
float tw = nvgTextBounds(ctx, 0, 0, mCaption.c_str(), nullptr, nullptr);
float iw = 0.0f, ih = fontSize;
if (mIcon)
{
if (nvgIsFontIcon(mIcon))
{
ih *= 1.5f;
nvgFontFace(ctx, "icons");
nvgFontSize(ctx, ih);
iw = nvgTextBounds(ctx, 0, 0, utf8(mIcon).data(), nullptr, nullptr)
+ mSize.y * 0.15f;
}
else
{
int w, h;
ih *= 0.9f;
nvgImageSize(ctx, mIcon, &w, &h);
iw = w * ih / h;
}
}
return ivec2((int)(tw + iw) + 20, fontSize + 10);
}
void Button::draw(NVGcontext *ctx) {
Widget::draw(ctx);
NVGcolor gradTop = mTheme->mButtonGradientTopUnfocused;
NVGcolor gradBot = mTheme->mButtonGradientBotUnfocused;
if (mPushed) {
gradTop = mTheme->mButtonGradientTopPushed;
gradBot = mTheme->mButtonGradientBotPushed;
} else if (mMouseFocus && mEnabled) {
gradTop = mTheme->mButtonGradientTopFocused;
gradBot = mTheme->mButtonGradientBotFocused;
}
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x() + 1, mPos.y() + 1.0f, mSize.x() - 2,
mSize.y() - 2, mTheme->mButtonCornerRadius - 1);
if(mBackgroundColor.w() != 0) {
nvgFillColor(ctx, mBackgroundColor);
nvgFill(ctx);
if(mPushed) {
gradTop.a = gradBot.a = 0.8f;
}
else {
double v = 1-mBackgroundColor.w();
gradTop.a = gradBot.a = mEnabled ? v : 0.5f;
gradTop.a = gradBot.a = (mMouseFocus && mEnabled) ? gradTop.a+0.2 : gradTop.a;
}
}
NVGpaint bg = nvgLinearGradient(ctx, mPos.x(), mPos.y(), mPos.x(),
mPos.y() + mSize.y(), gradTop, gradBot);
nvgFillPaint(ctx, bg);
nvgFill(ctx);
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x() + 0.5f, mPos.y() + (mPushed ? 0.5f : 1.5f), mSize.x() - 1,
mSize.y() - 1 - (mPushed ? 0.0f : 1.0f), mTheme->mButtonCornerRadius);
nvgStrokeColor(ctx, mTheme->mBorderLight);
nvgStroke(ctx);
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x() + 0.5f, mPos.y() + 0.5f, mSize.x() - 1,
mSize.y() - 2, mTheme->mButtonCornerRadius);
nvgStrokeColor(ctx, mTheme->mBorderDark);
nvgStroke(ctx);
nvgFontSize(ctx, mFontSize == -1 ? mTheme->mButtonFontSize : mFontSize);
nvgFontFace(ctx, "sans-bold");
float tw = nvgTextBounds(ctx, 0,0, mCaption.c_str(), nullptr, nullptr);
Vector2f center = mPos.cast<float>() + mSize.cast<float>() * 0.5f;
Vector2f textPos(center.x() - tw * 0.5f, center.y() - 1);
NVGcolor textColor =
mTextColor.w() == 0 ? mTheme->mTextColor : mTextColor;
if (!mEnabled)
textColor = mTheme->mDisabledTextColor;
if (mIcon) {
auto icon = utf8(mIcon);
float iw, ih = mFontSize == -1 ? mTheme->mButtonFontSize : mFontSize;
if (nvgIsFontIcon(mIcon)) {
ih *= 1.5f;
nvgFontSize(ctx, ih);
nvgFontFace(ctx, "icons");
iw = nvgTextBounds(ctx, 0, 0, icon.data(), nullptr, nullptr);
} else {
int w, h;
ih *= 0.9f;
nvgImageSize(ctx, mIcon, &w, &h);
iw = w * ih / h;
}
if (mCaption != "")
iw += mSize.y() * 0.15f;
nvgFillColor(ctx, textColor);
nvgTextAlign(ctx, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE);
Vector2f iconPos = center;
iconPos.y() -= 1;
if (mIconPosition == LeftCentered) {
iconPos.x() -= (tw + iw) * 0.5f;
textPos.x() += iw * 0.5f;
} else if (mIconPosition == RightCentered) {
textPos.x() -= iw * 0.5f;
iconPos.x() += tw * 0.5f;
} else if (mIconPosition == Left) {
iconPos.x() = mPos.x() + 8;
} else if (mIconPosition == Right) {
iconPos.x() = mPos.x() + mSize.x() - iw - 8;
}
if (nvgIsFontIcon(mIcon)) {
nvgText(ctx, iconPos.x(), iconPos.y()+1, icon.data(), nullptr);
} else {
NVGpaint imgPaint = nvgImagePattern(ctx,
iconPos.x(), iconPos.y() - ih/2, iw, ih, 0, mIcon, mEnabled ? 0.5f : 0.25f);
nvgFillPaint(ctx, imgPaint);
nvgFill(ctx);
}
}
nvgFontSize(ctx, mFontSize == -1 ? mTheme->mButtonFontSize : mFontSize);
nvgFontFace(ctx, "sans-bold");
nvgTextAlign(ctx, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE);
nvgFillColor(ctx, mTheme->mTextColorShadow);
nvgText(ctx, textPos.x(), textPos.y(), mCaption.c_str(), nullptr);
nvgFillColor(ctx, textColor);
nvgText(ctx, textPos.x(), textPos.y()+1, mCaption.c_str(), nullptr);
}
void Button::draw(NVGcontext * ctx)
{
Widget::draw(ctx);
NVGcolor gradTop = mTheme->mButtonGradientTopUnfocused;
NVGcolor gradBot = mTheme->mButtonGradientBotUnfocused;
if (mPushed)
{
gradTop = mTheme->mButtonGradientTopPushed;
gradBot = mTheme->mButtonGradientBotPushed;
}
else
if (mMouseFocus && mEnabled)
{
gradTop = mTheme->mButtonGradientTopFocused;
gradBot = mTheme->mButtonGradientBotFocused;
}
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x + 1, mPos.y + 1.0f, mSize.x - 2,
mSize.y - 2, mTheme->mButtonCornerRadius - 1);
if (mBackgroundColor.a != 0)
{
nvgFillColor(ctx, Colour(mBackgroundColor.r, mBackgroundColor.g, mBackgroundColor.b, 1.f));
nvgFill(ctx);
if (mPushed)
gradTop.a = gradBot.a = 0.8f;
else
{
double v = 1 - mBackgroundColor.a;
gradTop.a = gradBot.a = mEnabled ? v : v * .5f + .5f;
}
}
NVGpaint bg = nvgLinearGradient(ctx, mPos.x, mPos.y, mPos.x,
mPos.y + mSize.y, gradTop, gradBot);
nvgFillPaint(ctx, bg);
nvgFill(ctx);
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x + 0.5f, mPos.y + (mPushed ? 0.5f : 1.5f), mSize.x - 1,
mSize.y - 1 - (mPushed ? 0.0f : 1.0f), mTheme->mButtonCornerRadius);
nvgStrokeColor(ctx, mTheme->mBorderLight);
nvgStroke(ctx);
nvgBeginPath(ctx);
nvgRoundedRect(ctx, mPos.x + 0.5f, mPos.y + 0.5f, mSize.x - 1,
mSize.y - 2, mTheme->mButtonCornerRadius);
nvgStrokeColor(ctx, mTheme->mBorderDark);
nvgStroke(ctx);
int fontSize = mFontSize == -1 ? mTheme->mButtonFontSize : mFontSize;
nvgFontSize(ctx, fontSize);
nvgFontFace(ctx, "sans-bold");
float tw = nvgTextBounds(ctx, 0, 0, mCaption.c_str(), nullptr, nullptr);
vec2 center = vec2((float)mPos.x, (float)mPos.y) + vec2((float)mSize.x, (float)mSize.y) * 0.5f;
vec2 textPos(center.x - tw * 0.5f, center.y - 1);
NVGcolor textColor =
mTextColor.a == 0 ? mTheme->mTextColor : mTextColor;
if (!mEnabled)
textColor = mTheme->mDisabledTextColor;
if (mIcon)
{
auto icon = utf8(mIcon);
float iw, ih = fontSize;
if (nvgIsFontIcon(mIcon))
{
ih *= 1.5f;
nvgFontSize(ctx, ih);
nvgFontFace(ctx, "icons");
iw = nvgTextBounds(ctx, 0, 0, icon.data(), nullptr, nullptr);
}
else
{
int w, h;
ih *= 0.9f;
nvgImageSize(ctx, mIcon, &w, &h);
iw = w * ih / h;
}
if (mCaption != "")
iw += mSize.y * 0.15f;
nvgFillColor(ctx, textColor);
nvgTextAlign(ctx, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE);
vec2 iconPos = center;
iconPos.y -= 1;
if (mIconPosition == IconPosition::LeftCentered)
{
iconPos.x -= (tw + iw) * 0.5f;
textPos.x += iw * 0.5f;
}
else
if (mIconPosition == IconPosition::RightCentered)
{
textPos.x -= iw * 0.5f;
iconPos.x += tw * 0.5f;
}
else
if (mIconPosition == IconPosition::Left)
iconPos.x = mPos.x + 8;
else
if (mIconPosition == IconPosition::Right)
iconPos.x = mPos.x + mSize.x - iw - 8;
if (nvgIsFontIcon(mIcon))
nvgText(ctx, iconPos.x, iconPos.y + 1, icon.data(), nullptr);
else
{
NVGpaint imgPaint = nvgImagePattern(ctx,
iconPos.x, iconPos.y - ih / 2, iw, ih, 0, mIcon, mEnabled ? 0.5f : 0.25f);
nvgFillPaint(ctx, imgPaint);
nvgFill(ctx);
}
}
nvgFontSize(ctx, fontSize);
nvgFontFace(ctx, "sans-bold");
nvgTextAlign(ctx, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE);
nvgFillColor(ctx, mTheme->mTextColorShadow);
nvgText(ctx, textPos.x, textPos.y, mCaption.c_str(), nullptr);
nvgFillColor(ctx, textColor);
nvgText(ctx, textPos.x, textPos.y + 1, mCaption.c_str(), nullptr);
}