feat: add a new awesome feature
This commit is contained in:
208
src/Canvas.cpp
208
src/Canvas.cpp
@@ -17,21 +17,43 @@ void Canvas::clearAllControls()
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controls.clear();
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}
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void Canvas::draw()
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{
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if (!dirty||!show)return;
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if (!dirty || !show)
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{
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for (auto& control : controls)
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if (auto c = dynamic_cast<Table*>(control.get()))
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c->draw();
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return;
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}
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saveStyle();
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setlinecolor(canvasBorderClor);//设置线色
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setfillcolor(canvasBkClor);//设置填充色
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if(StellarX::FillMode::Null != canvasFillMode)
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setfillcolor(canvasBkClor);//设置填充色
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setfillstyle((int)canvasFillMode);//设置填充模式
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setlinestyle((int)canvasLineStyle, canvaslinewidth);
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if ((saveBkX != this->x) || (saveBkY != this->y) || (!hasSnap) || (saveWidth != this->width) || (saveHeight != this->height) || !saveBkImage)
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saveBackground(x, y, width, height);
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// 恢复背景（清除旧内容）
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restBackground();
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// 在绘制画布之前，先恢复并更新背景快照：
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// 1. 如果已有快照，则先回贴旧快照以清除之前的内容。
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// 2. 当坐标或尺寸变化，或缓存图像无效时，丢弃旧快照并重新抓取新的背景。
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if (hasSnap)
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{
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// 恢复旧快照，清除上一次绘制
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restBackground();
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// 如果位置或尺寸变了，或没有有效缓存，则重新抓取
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if (!saveBkImage || saveBkX != this->x || saveBkY != this->y || saveWidth != this->width || saveHeight != this->height)
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{
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discardBackground();
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saveBackground(this->x, this->y, this->width, this->height);
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}
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}
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else
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{
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// 首次绘制或没有快照时直接抓取背景
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saveBackground(this->x, this->y, this->width, this->height);
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}
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// 再次恢复最新快照，确保绘制区域干净
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restBackground();
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//根据画布形状绘制
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switch (shape)
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{
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@@ -158,9 +180,173 @@ void Canvas::setDirty(bool dirty)
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void Canvas::onWindowResize()
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{
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Control::onWindowResize(); // 先处理自己
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for (auto& ch : controls) // 再转发给所有子控件
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ch->onWindowResize();
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// 首先处理自身的快照等逻辑
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Control::onWindowResize();
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// 记录父容器原始尺寸（用于计算子控件的右/下边距）
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int origParentW = this->localWidth;
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int origParentH = this->localHeight;
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// 当前容器的新尺寸
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int finalW = this->width;
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int finalH = this->height;
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// 当前容器的新坐标（全局坐标）
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int parentX = this->x;
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int parentY = this->y;
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// 调整每个子控件在 AnchorToEdges 模式下的位置与尺寸
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for (auto& ch : controls)
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{
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// Only adjust when using anchor-to-edges layout
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if (ch->getLayoutMode() == StellarX::LayoutMode::AnchorToEdges)
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{
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// Determine whether this child is a Table; tables keep their height constant
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bool isTable = (dynamic_cast<Table*>(ch.get()) != nullptr);
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// Unpack anchors
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auto a1 = ch->getAnchor_1();
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auto a2 = ch->getAnchor_2();
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bool anchorLeft = (a1 == StellarX::Anchor::Left || a2 == StellarX::Anchor::Left);
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bool anchorRight = (a1 == StellarX::Anchor::Right || a2 == StellarX::Anchor::Right);
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bool anchorTop = (a1 == StellarX::Anchor::Top || a2 == StellarX::Anchor::Top);
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bool anchorBottom = (a1 == StellarX::Anchor::Bottom || a2 == StellarX::Anchor::Bottom);
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// If it's a table, treat as anchored left and right horizontally and anchored top vertically by default.
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if (isTable)
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{
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anchorLeft = true;
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anchorRight = true;
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// If no explicit vertical anchor was provided, default to top.
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if (!(anchorTop || anchorBottom))
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{
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anchorTop = true;
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}
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}
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// Compute new X and width
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int newX = ch->getX();
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int newWidth = ch->getWidth();
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if (anchorLeft && anchorRight)
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{
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// Scale horizontally relative to parent's size.
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if (origParentW > 0)
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{
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// Maintain proportional position and size based on original local values.
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double scaleW = static_cast<double>(finalW) / static_cast<double>(origParentW);
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newX = parentX + static_cast<int>(ch->getLocalX() * scaleW + 0.5);
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newWidth = static_cast<int>(ch->getLocalWidth() * scaleW + 0.5);
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}
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else
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{
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// Fallback: keep original
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newX = parentX + ch->getLocalX();
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newWidth = ch->getLocalWidth();
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}
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}
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else if (anchorLeft && !anchorRight)
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{
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// Only left anchored: keep original width and left margin.
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newWidth = ch->getLocalWidth();
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newX = parentX + ch->getLocalX();
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}
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else if (!anchorLeft && anchorRight)
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{
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// Only right anchored: keep original width and right margin.
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newWidth = ch->getLocalWidth();
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int origRightDist = origParentW - (ch->getLocalX() + ch->getLocalWidth());
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newX = parentX + finalW - origRightDist - newWidth;
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}
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else
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{
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// No horizontal anchor: position relative to parent's left and width unchanged.
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newWidth = ch->getLocalWidth();
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newX = parentX + ch->getLocalX();
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}
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ch->setX(newX);
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ch->setWidth(newWidth);
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// Compute new Y and height
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int newY = ch->getY();
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int newHeight = ch->getHeight();
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if (isTable)
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{
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// Table: Height remains constant; adjust Y based on anchors.
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newHeight = ch->getLocalHeight();
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if (anchorTop && anchorBottom)
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{
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// If both top and bottom anchored, scale Y but keep height.
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if (origParentH > 0)
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{
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double scaleH = static_cast<double>(finalH) / static_cast<double>(origParentH);
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newY = parentY + static_cast<int>(ch->getLocalY() * scaleH + 0.5);
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}
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else
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{
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newY = parentY + ch->getLocalY();
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}
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}
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else if (anchorTop && !anchorBottom)
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{
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// Top anchored only
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newY = parentY + ch->getLocalY();
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}
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else if (!anchorTop && anchorBottom)
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{
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// Bottom anchored only
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int origBottomDist = origParentH - (ch->getLocalY() + ch->getLocalHeight());
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newY = parentY + finalH - origBottomDist - newHeight;
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}
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else
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{
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// No vertical anchor: default to top
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newY = parentY + ch->getLocalY();
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}
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}
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else
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{
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if (anchorTop && anchorBottom)
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{
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// Scale vertically relative to parent's size.
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if (origParentH > 0)
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{
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double scaleH = static_cast<double>(finalH) / static_cast<double>(origParentH);
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newY = parentY + static_cast<int>(ch->getLocalY() * scaleH + 0.5);
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newHeight = static_cast<int>(ch->getLocalHeight() * scaleH + 0.5);
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}
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else
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{
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newY = parentY + ch->getLocalY();
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newHeight = ch->getLocalHeight();
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}
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}
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else if (anchorTop && !anchorBottom)
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{
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// Top anchored only: keep height constant
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newHeight = ch->getLocalHeight();
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newY = parentY + ch->getLocalY();
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}
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else if (!anchorTop && anchorBottom)
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{
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// Bottom anchored only: keep height and adjust Y relative to bottom
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newHeight = ch->getLocalHeight();
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int origBottomDist = origParentH - (ch->getLocalY() + ch->getLocalHeight());
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newY = parentY + finalH - origBottomDist - newHeight;
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}
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else
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{
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// No vertical anchor: position relative to parent's top, height constant.
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newHeight = ch->getLocalHeight();
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newY = parentY + ch->getLocalY();
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}
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}
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ch->setY(newY);
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ch->setHeight(newHeight);
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}
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// Always forward the window resize event to the child (recursively).
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ch->onWindowResize();
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}
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}
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void Canvas::requestRepaint(Control* parent)
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