Refactor GuiScrollText, GuiScrollFormattedText, GuiAdvancedScrollText, ShipsLog to use GuiScrollContainer

CMakeLists.txt

@@ -157,7 +157,9 @@ set(GUI_LIB_SOURCES
     src/gui/gui2_entrylist.cpp
     src/gui/gui2_progressbar.cpp
     src/gui/gui2_progressslider.cpp
+    src/gui/gui2_multilinetext.cpp
     src/gui/gui2_scrolltext.cpp
+    src/gui/gui2_scrollcontainer.cpp
     src/gui/gui2_advancedscrolltext.cpp
     src/gui/gui2_button.cpp
     src/gui/gui2_resizabledialog.cpp
@@ -194,6 +196,8 @@ set(GUI_LIB_SOURCES
     src/gui/gui2_resizabledialog.h
     src/gui/gui2_rotationdial.h
     src/gui/gui2_scrollbar.h
+    src/gui/gui2_scrollcontainer.h
+    src/gui/gui2_multilinetext.h
     src/gui/gui2_scrolltext.h
     src/gui/gui2_selector.h
     src/gui/gui2_slider.h

src/gui/gui2_advancedscrolltext.cpp

@@ -1,12 +1,78 @@
 #include "gui2_advancedscrolltext.h"
 
 GuiAdvancedScrollText::GuiAdvancedScrollText(GuiContainer* owner, string id)
-: GuiElement(owner, id), text_size(30.0f), rect_width(rect.size.x), max_prefix_width(0.0f), mouse_scroll_steps(25)
+: GuiScrollContainer(owner, id)
 {
-    scrollbar = new GuiScrollbar(this, id + "_SCROLL", 0, 1, 0, nullptr);
-    scrollbar->setPosition(0, 0, sp::Alignment::TopRight)->setSize(50, GuiElement::GuiSizeMax);
-    // Calculate scrolling a one-line entry by scrollbar arrow buttons.
-    scrollbar->setClickChange(sp::RenderTarget::getDefaultFont()->prepare("1", 32, text_size, {255, 255, 255, 255}, rect.size, sp::Alignment::TopLeft).getUsedAreaSize().y);
+    entry_canvas = new EntryCanvas(this, id + "_CANVAS");
+    entry_canvas->setSize(GuiElement::GuiSizeMax, GuiElement::GuiSizeMax);
+}
+
+GuiAdvancedScrollText::EntryCanvas::EntryCanvas(GuiAdvancedScrollText* owner, const string& id)
+: GuiElement(owner, id)
+{
+}
+
+void GuiAdvancedScrollText::EntryCanvas::onDraw(sp::RenderTarget& renderer)
+{
+    auto* scroll_text = static_cast<GuiAdvancedScrollText*>(owner);
+
+    // Re-prep all entries if the canvas width has changed. Two passes: first
+    // collect prefix widths to find the max, then prep text with that width.
+    if (prev_canvas_width != rect.size.x)
+    {
+        prev_canvas_width = rect.size.x;
+        scroll_text->prefix_widths.clear();
+        scroll_text->max_prefix_width = 0.0f;
+
+        for (auto& e : scroll_text->entries)
+        {
+            scroll_text->prepEntryPrefix(e, prev_canvas_width);
+            const float pw = e.prepared_prefix.getUsedAreaSize().x;
+            scroll_text->prefix_widths[pw] += 1;
+            scroll_text->max_prefix_width = std::max(scroll_text->max_prefix_width, pw);
+        }
+
+        const float text_col_width = prev_canvas_width - scroll_text->max_prefix_width;
+        for (auto& e : scroll_text->entries)
+            scroll_text->prepEntryText(e, text_col_width);
+    }
+
+    // Render entries stacked top-to-bottom, preserving the leading gap from the
+    // original implementation so that ascenders of the first line are visible.
+    float y_offset = scroll_text->text_size + 12.0f;
+
+    for (auto& e : scroll_text->entries)
+    {
+        const float height = e.prepared_text.getUsedAreaSize().y;
+        const float y_start = e.prepared_prefix.data.empty() ? 0.0f
+            : e.prepared_prefix.data[0].position.y;
+
+        // Copy prepared strings and remap their y positions to y_offset.
+        auto draw_prefix = e.prepared_prefix;
+        auto draw_text = e.prepared_text;
+
+        for (auto& g : draw_prefix.data)
+            g.position.y = y_offset;
+        for (auto& g : draw_text.data)
+            g.position.y = (g.position.y - y_start) + y_offset;
+
+        renderer.drawText(rect, draw_prefix);
+        renderer.drawText(
+            sp::Rect{
+                rect.position.x + scroll_text->max_prefix_width,
+                rect.position.y,
+                rect.size.x - scroll_text->max_prefix_width,
+                rect.size.y
+            },
+            draw_text
+        );
+
+        y_offset += height;
+    }
+
+    // Auto-size the canvas height to fit all entries.
+    setSize(GuiElement::GuiSizeMax, y_offset);
+    layout.fill_height = false;
 }
 
 GuiAdvancedScrollText* GuiAdvancedScrollText::addEntry(string prefix, string text, glm::u8vec4 color, unsigned int seq)
@@ -16,20 +82,81 @@ GuiAdvancedScrollText* GuiAdvancedScrollText::addEntry(string prefix, string tex
     entry.text = text;
     entry.color = color;
     entry.seq = seq;
-    prepEntry(entry);
+
+    const float canvas_width = entry_canvas->getRect().size.x;
+
+    // Prep the prefix to get its width.
+    prepEntryPrefix(entry, canvas_width);
+    const float new_prefix_width = entry.prepared_prefix.getUsedAreaSize().x;
+    prefix_widths[new_prefix_width] += 1;
+
+    if (new_prefix_width > max_prefix_width)
+    {
+        // New prefix is wider: re-prep all existing entries' text with the
+        // narrower text column.
+        max_prefix_width = new_prefix_width;
+        const float text_col_width = canvas_width - max_prefix_width;
+        for (auto& e : entries)
+            prepEntryText(e, text_col_width);
+    }
+    else
+    {
+        prepEntryText(entry, canvas_width - max_prefix_width);
+    }
+
+    if (auto_scroll_down) scrollToFraction(1.0f);
     return this;
 }
 
-unsigned int GuiAdvancedScrollText::getEntryCount() const
+GuiAdvancedScrollText* GuiAdvancedScrollText::setTextSize(float new_text_size)
 {
-    return entries.size();
+    text_size = std::max(1.0f, new_text_size);
+
+    // Re-prep all entries with the new text size. The EntryCanvas::onDraw
+    // resize path will also catch this on next draw if canvas width changed,
+    // but we force it here for the height-only case.
+    const float canvas_width = entry_canvas->getRect().size.x;
+    if (canvas_width > 0.0f)
+    {
+        prefix_widths.clear();
+        max_prefix_width = 0.0f;
+
+        for (auto& e : entries)
+        {
+            prepEntryPrefix(e, canvas_width);
+            const float pw = e.prepared_prefix.getUsedAreaSize().x;
+            prefix_widths[pw] += 1;
+            max_prefix_width = std::max(max_prefix_width, pw);
+        }
+
+        const float text_col_width = canvas_width - max_prefix_width;
+        for (auto& e : entries)
+            prepEntryText(e, text_col_width);
+    }
+
+    return this;
 }
 
-GuiAdvancedScrollText* GuiAdvancedScrollText::setTextSize(float text_size)
+void GuiAdvancedScrollText::prepEntryPrefix(Entry& e, float canvas_width)
 {
-    this->text_size = std::max(1.0F, text_size);
-    scrollbar->setClickChange(sp::RenderTarget::getDefaultFont()->prepare("1", 32, text_size, {255, 255, 255, 255}, rect.size, sp::Alignment::TopLeft).getUsedAreaSize().y);
-    return this;
+    e.prepared_prefix = sp::RenderTarget::getDefaultFont()->prepare(
+        e.prefix, 32, text_size, {255, 255, 255, 255},
+        {canvas_width, 10000.0f}, sp::Alignment::TopLeft
+    );
+}
+
+void GuiAdvancedScrollText::prepEntryText(Entry& e, float text_column_width)
+{
+    e.prepared_text = sp::RenderTarget::getDefaultFont()->prepare(
+        e.text, 32, text_size, e.color,
+        {text_column_width, 10000.0f},
+        sp::Alignment::TopLeft, sp::Font::FlagLineWrap
+    );
+}
+
+unsigned int GuiAdvancedScrollText::getEntryCount() const
+{
+    return entries.size();
 }
 
 string GuiAdvancedScrollText::getEntryText(int index) const
@@ -39,15 +166,6 @@ string GuiAdvancedScrollText::getEntryText(int index) const
     return entries[index].text;
 }
 
-GuiAdvancedScrollText::Entry GuiAdvancedScrollText::prepEntry(GuiAdvancedScrollText::Entry& e){
-    e.prepared_prefix = sp::RenderTarget::getDefaultFont()->prepare(e.prefix, 32, text_size, {255, 255, 255, 255}, rect.size, sp::Alignment::TopLeft);
-    const float entry_prefix_width = e.prepared_prefix.getUsedAreaSize().x;
-    prefix_widths[entry_prefix_width] += 1;
-    max_prefix_width = std::max(max_prefix_width, entry_prefix_width);
-    e.prepared_text = sp::RenderTarget::getDefaultFont()->prepare(e.text, 32, text_size, e.color, {rect.size.x - max_prefix_width - 50.0f, rect.size.y}, sp::Alignment::TopLeft, sp::Font::FlagLineWrap | sp::Font::FlagClip);
-    return e;
-}
-
 unsigned int GuiAdvancedScrollText::getEntrySeq(int index) const
 {
     if (index < 0 || index >= static_cast<int>(getEntryCount()))
@@ -60,90 +178,22 @@ GuiAdvancedScrollText* GuiAdvancedScrollText::removeEntry(int index)
     if (index < 0 || index >= static_cast<int>(getEntryCount()))
         return this;
 
-    // Find new max prefix if entry was the last one with the current max
     const float entry_prefix_width = entries[index].prepared_prefix.getUsedAreaSize().x;
-    bool last_with_width = false;
-    if(--prefix_widths[entry_prefix_width] == 0){
-        last_with_width = true;
+    if (--prefix_widths[entry_prefix_width] == 0)
+    {
         prefix_widths.erase(entry_prefix_width);
-    }
-    if (entry_prefix_width == max_prefix_width && last_with_width){
-        max_prefix_width = prefix_widths.end()->first;
+        if (entry_prefix_width == max_prefix_width)
+            max_prefix_width = prefix_widths.empty() ? 0.0f : prefix_widths.rbegin()->first;
     }
 
     entries.erase(entries.begin() + index);
-
     return this;
 }
 
 GuiAdvancedScrollText* GuiAdvancedScrollText::clearEntries()
 {
     entries.clear();
     prefix_widths.clear();
-    max_prefix_width = 0;
+    max_prefix_width = 0.0f;
     return this;
 }
-
-void GuiAdvancedScrollText::onDraw(sp::RenderTarget& renderer)
-{
-    const bool is_resized = rect_width != rect.size.x;
-    if (is_resized) {
-        rect_width = rect.size.x;
-        prefix_widths.clear();
-        max_prefix_width = 0;
-    }
-
-    //Draw the visible entries
-    float draw_offset = -scrollbar->getValue() + text_size + 12.0f;
-
-    for(Entry& e : entries)
-    {
-        // Window width has changed. Re-prep fonts.
-        if (is_resized){ prepEntry(e); }
-
-        const float height = e.prepared_text.getUsedAreaSize().y;
-
-        if (draw_offset + height > 0
-            && draw_offset < rect.size.y)
-        {
-            const float y_start = e.prepared_prefix.data[0].position.y;
-
-            auto prepared_prefix = e.prepared_prefix;
-            auto prepared_text = e.prepared_text;
-            for(auto& g : prepared_prefix.data)
-            {
-                g.position.y = draw_offset;
-            }
-            for(auto& g : prepared_text.data)
-            {
-                g.position.y = (g.position.y - y_start) + draw_offset;
-            }
-            renderer.drawText(rect, prepared_prefix, sp::Font::FlagClip);
-            renderer.drawText(sp::Rect(rect.position.x + max_prefix_width, rect.position.y, rect.size.x - 50 - max_prefix_width, rect.size.y), prepared_text, sp::Font::FlagClip);
-        }
-
-        draw_offset += height;
-    }
-
-    //Calculate how many lines we have to display in total.
-    const int line_count = (draw_offset - text_size - 12.0f) + scrollbar->getValue();
-
-    //Check if we need to update the scroll bar.
-    if (scrollbar->getMax() != line_count)
-    {
-        const int diff = line_count - scrollbar->getMax();
-        scrollbar->setRange(0, line_count);
-        scrollbar->setValueSize(rect.size.y);
-        if (auto_scroll_down)
-            scrollbar->setValue(scrollbar->getValue() + diff);
-    }
-
-    scrollbar->setVisible(rect.size.y > 100);
-}
-
-bool GuiAdvancedScrollText::onMouseWheelScroll(glm::vec2 position, float value)
-{
-    float range = scrollbar->getCorrectedMax() - scrollbar->getMin();
-    scrollbar->setValue((scrollbar->getValue() - value * range / mouse_scroll_steps) );
-    return true;
-}