Added WidgetText. Fixed some things. Updated README
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@@ -5,7 +5,7 @@
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class Widget
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{
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private:
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protected:
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// Internal surface for drawing
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SDL_Surface* m_surface;
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223
Widgets/WidgetText.cpp
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223
Widgets/WidgetText.cpp
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@@ -0,0 +1,223 @@
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#include "WidgetText.h"
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using std::string;
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static SDL_Surface* render_text(bool should_wrap, TTF_Font* font, const string& text, SDL_Color color, Uint32 wrap_size)
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{
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SDL_Surface* txt_surface = nullptr;
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if (should_wrap)
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{
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txt_surface = TTF_RenderUTF8_Solid_Wrapped(font, text.c_str(), color, wrap_size);
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}
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else
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{
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txt_surface = TTF_RenderUTF8_Solid(font, text.c_str(), color);
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}
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return txt_surface;
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}
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WidgetText::WidgetText(int width, int height, string text,
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TextFit fit, bool should_wrap,
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HorizontalAlign halign, VerticalAlign valign,
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SDL_Color text_color,
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int size, std::string font)
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: Widget(width, height),
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m_text(text),
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m_font_file(font),
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m_size(size),
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m_fit(fit),
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m_should_wrap(should_wrap),
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m_halign(halign),
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m_valign(valign),
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m_text_color(text_color)
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{
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if (nullptr != m_surface)
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{
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SDL_SetSurfaceBlendMode(m_surface, SDL_BLENDMODE_BLEND);
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}
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}
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WidgetText::WidgetText(int width, int height, string text,
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TextFit fit, bool should_wrap,
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int size, string font)
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: Widget(width, height),
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m_text(text),
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m_font_file(font),
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m_size(size),
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m_fit(fit),
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m_should_wrap(should_wrap),
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m_halign(HALIGN_CENTER),
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m_valign(VALIGN_CENTER),
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m_text_color{.r = 0, .g = 0, .b = 0, .a = SDL_ALPHA_OPAQUE}
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{
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if (nullptr != m_surface)
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{
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SDL_SetSurfaceBlendMode(m_surface, SDL_BLENDMODE_BLEND);
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}
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}
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WidgetText::WidgetText(int width, int height, string text,
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int size, string font)
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: Widget(width, height),
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m_text(text),
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m_font_file(font),
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m_size(size),
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m_fit(FIT_NONE),
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m_halign(HALIGN_CENTER),
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m_valign(VALIGN_CENTER),
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m_text_color{.r = 0, .g = 0, .b = 0, .a = SDL_ALPHA_OPAQUE}
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{
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if (nullptr != m_surface)
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{
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SDL_SetSurfaceBlendMode(m_surface, SDL_BLENDMODE_BLEND);
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}
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}
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void WidgetText::set_text(const string& text)
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{
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m_text = text;
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}
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void WidgetText::set_font(const string& font_file)
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{
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m_font_file = font_file;
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}
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void WidgetText::set_font_size(int size)
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{
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m_size = size;
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}
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void WidgetText::set_fit(TextFit fit)
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{
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m_fit = fit;
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}
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void WidgetText::set_halign(HorizontalAlign halign)
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{
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m_halign = halign;
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}
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void WidgetText::set_valign(VerticalAlign valign)
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{
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m_valign = valign;
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}
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void WidgetText::set_color(SDL_Color text_color)
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{
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m_text_color = text_color;
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}
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void WidgetText::draw()
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{
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// Clear surface
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SDL_FillRect(m_surface, nullptr, SDL_MapRGBA(m_surface->format, 255, 255, 255, SDL_ALPHA_TRANSPARENT));
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string font_name = m_font_file;
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if (font_name.empty())
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{
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font_name = default_font_name;
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}
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TTF_Font* font = get_font(m_size, font_name);
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if (nullptr == font)
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{
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// TODO: Message printing
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return;
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}
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// Render text
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SDL_Surface* txt_surface = render_text(m_should_wrap, font, m_text, m_text_color, m_rect.w);
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if (nullptr == txt_surface)
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{
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// TODO: Message printing
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return;
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}
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// Check if text fits
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if (m_fit != FIT_NONE)
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{
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double x_scale;
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double y_scale;
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x_scale = m_surface->w;
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x_scale /= txt_surface->w;
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y_scale = m_surface->h;
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y_scale /= txt_surface->h;
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// Find the scale needed to shrink or enlarge with
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double min_scale = x_scale;
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if (y_scale < min_scale)
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{
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min_scale = y_scale;
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}
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// Do not scale up if only shrinkage is allowed
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if ((min_scale > 1.0) && (FIT_SHRINK == m_fit))
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{
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min_scale = 1.0;
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}
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// Find new font size
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int new_text_size = m_size;
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new_text_size *= min_scale;
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// Re-render text
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if (new_text_size != m_size)
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{
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SDL_FreeSurface(txt_surface);
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font = get_font(new_text_size, font_name);
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if (nullptr == font)
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{
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// TODO: Message printing
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return;
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}
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txt_surface = render_text(m_should_wrap, font, m_text, m_text_color, m_rect.w);
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if (nullptr == txt_surface)
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{
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// TODO: Message printing
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return;
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}
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}
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}
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// Now we have the final rendered text surface
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SDL_Rect align = surface_align(m_surface, txt_surface, m_halign, m_valign);
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SDL_BlitSurface(txt_surface, NULL, m_surface, &align);
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SDL_FreeSurface(txt_surface);
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}
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Widget* WidgetText::builder(const nlohmann::json& j)
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{
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int width = 0;
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int height = 0;
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string text = "";
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TextFit fit = FIT_NONE;
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bool should_wrap = false;
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HorizontalAlign halign = HALIGN_CENTER;
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VerticalAlign valign = VALIGN_CENTER;
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SDL_Color text_color = {.r = 0, .g = 0, .b = 0, .a = SDL_ALPHA_OPAQUE};
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int size = 0;
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string font = "";
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json_extract(j, "width", width);
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json_extract(j, "height", height);
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json_extract(j, "text", text);
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json_extract(j, "fit", fit);
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json_extract(j, "should_wrap", should_wrap);
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json_extract(j, "halign", halign);
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json_extract(j, "valign", valign);
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json_extract(j, "color", text_color);
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json_extract(j, "size", size);
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json_extract(j, "font", font);
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if ((0 == width) || (0 == height) || (0 == size))
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{
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return nullptr;
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}
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return new WidgetText(width, height, text, fit, should_wrap, halign, valign, text_color, size, font);
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}
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71
Widgets/WidgetText.h
Normal file
71
Widgets/WidgetText.h
Normal file
@@ -0,0 +1,71 @@
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#ifndef WIDGET_TEXT_H_
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#define WIDGET_TEXT_H_
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#include "Widget.h"
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#include <SDL2/SDL.h>
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#include <string>
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#include "../sdl_helpers.h"
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#include "../json.hpp"
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class WidgetText : public Widget
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{
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protected:
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// Text to display
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std::string m_text;
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// Desired font file
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// Leave empty for default
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std::string m_font_file;
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// Desired font size
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int m_size;
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// Whether to fit text inside rectangle
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// FIT_SHRINK will try with the desired font size and shrink if needed
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// FIT_AUTO will with the desired font size and shrink or enlarge if needed
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// Default - FIT_NONE
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TextFit m_fit;
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// Whether to wrap to multiple lines
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// Default - false
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bool m_should_wrap;
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// Default - center
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HorizontalAlign m_halign;
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// Default - center
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VerticalAlign m_valign;
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// Default - black
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SDL_Color m_text_color;
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public:
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WidgetText(int width, int height, std::string text,
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TextFit fit, bool should_wrap,
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HorizontalAlign halign, VerticalAlign valign,
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SDL_Color text_color,
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int size, std::string font = "");
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WidgetText(int width, int height, std::string text,
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TextFit fit, bool should_wrap,
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int size, std::string font = "");
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WidgetText(int width, int height, std::string text,
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int size, std::string font = "");
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void set_text(const std::string& text);
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void set_font(const std::string& font_file);
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void set_font_size(int size);
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void set_fit(TextFit fit);
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void set_halign(HorizontalAlign halign);
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void set_valign(VerticalAlign valign);
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void set_color(SDL_Color text_color);
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virtual void draw() override;
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static Widget* builder(const nlohmann::json& j);
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};
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#endif // WIDGET_TEXT_H_
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