diff options
Diffstat (limited to 'CruUI/ui/controls/linear_layout.cpp')
| -rw-r--r-- | CruUI/ui/controls/linear_layout.cpp | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/CruUI/ui/controls/linear_layout.cpp b/CruUI/ui/controls/linear_layout.cpp deleted file mode 100644 index 8f537ea8..00000000 --- a/CruUI/ui/controls/linear_layout.cpp +++ /dev/null @@ -1,178 +0,0 @@ -#include "linear_layout.h" - -namespace cru::ui::controls -{ - LinearLayout::LinearLayout(const Orientation orientation) - : Control(true), orientation_(orientation) - { - - } - - inline float AtLeast0(const float value) - { - return value < 0 ? 0 : value; - } - - inline Size AtLeast0(const Size& size) - { - return Size(AtLeast0(size.width), AtLeast0(size.height)); - } - - Size LinearLayout::OnMeasure(const Size& available_size) - { - const auto layout_params = GetLayoutParams(); - - if (!layout_params->Validate()) - throw std::runtime_error("LayoutParams is not valid. Please check it."); - - auto&& get_available_length_for_child = [](const LayoutSideParams& layout_length, const float available_length) -> float - { - switch (layout_length.mode) - { - case MeasureMode::Exactly: - { - return std::min(layout_length.length, available_length); - } - case MeasureMode::Stretch: - case MeasureMode::Content: - { - return available_length; - } - default: - UnreachableCode(); - } - }; - - Size total_available_size_for_children( - get_available_length_for_child(layout_params->width, available_size.width), - get_available_length_for_child(layout_params->height, available_size.height) - ); - - auto rest_available_size_for_children = total_available_size_for_children; - - float secondary_side_child_max_length = 0; - - std::list<Control*> stretch_control_list; - - // First measure Content and Exactly and count Stretch. - if (orientation_ == Orientation::Horizontal) - ForeachChild([&](Control* const control) - { - const auto mode = control->GetLayoutParams()->width.mode; - if (mode == MeasureMode::Content || mode == MeasureMode::Exactly) - { - control->Measure(AtLeast0(rest_available_size_for_children)); - const auto size = control->GetDesiredSize(); - rest_available_size_for_children.width -= size.width; - secondary_side_child_max_length = std::max(size.height, secondary_side_child_max_length); - } - else - stretch_control_list.push_back(control); - }); - else - ForeachChild([&](Control* const control) - { - const auto mode = control->GetLayoutParams()->height.mode; - if (mode == MeasureMode::Content || mode == MeasureMode::Exactly) - { - control->Measure(AtLeast0(rest_available_size_for_children)); - const auto size = control->GetDesiredSize(); - rest_available_size_for_children.height -= size.height; - secondary_side_child_max_length = std::max(size.width, secondary_side_child_max_length); - } - else - stretch_control_list.push_back(control); - }); - - if (orientation_ == Orientation::Horizontal) - { - const auto available_width = rest_available_size_for_children.width / stretch_control_list.size(); - for (const auto control : stretch_control_list) - { - control->Measure(Size(AtLeast0(available_width), rest_available_size_for_children.height)); - const auto size = control->GetDesiredSize(); - rest_available_size_for_children.width -= size.width; - secondary_side_child_max_length = std::max(size.height, secondary_side_child_max_length); - } - } - else - { - const auto available_height = rest_available_size_for_children.height / stretch_control_list.size(); - for (const auto control : stretch_control_list) - { - control->Measure(Size(rest_available_size_for_children.width, AtLeast0(available_height))); - const auto size = control->GetDesiredSize(); - rest_available_size_for_children.height -= size.height; - secondary_side_child_max_length = std::max(size.width, secondary_side_child_max_length); - } - } - - auto actual_size_for_children = total_available_size_for_children; - if (orientation_ == Orientation::Horizontal) - { - actual_size_for_children.width -= rest_available_size_for_children.width; - actual_size_for_children.height = secondary_side_child_max_length; - } - else - { - actual_size_for_children.width = secondary_side_child_max_length; - actual_size_for_children.height -= rest_available_size_for_children.height; - } - - auto&& calculate_final_length = [](const LayoutSideParams& layout_length, const float length_for_children, const float max_child_length) -> float - { - switch (layout_length.mode) - { - case MeasureMode::Exactly: - case MeasureMode::Stretch: - return length_for_children; - case MeasureMode::Content: - return max_child_length; - default: - UnreachableCode(); - } - }; - - return Size( - calculate_final_length(layout_params->width, total_available_size_for_children.width, actual_size_for_children.width), - calculate_final_length(layout_params->height, total_available_size_for_children.height, actual_size_for_children.height) - ); - } - - void LinearLayout::OnLayout(const Rect& rect) - { - float current_anchor_length = 0; - ForeachChild([this, ¤t_anchor_length, rect](Control* control) - { - const auto layout_params = control->GetLayoutParams(); - const auto size = control->GetDesiredSize(); - const auto alignment = orientation_ == Orientation::Horizontal ? layout_params->height.alignment : layout_params->width.alignment; - - auto&& calculate_anchor = [alignment](const float layout_length, const float control_length) -> float - { - switch (alignment) - { - case Alignment::Center: - return (layout_length - control_length) / 2; - case Alignment::Start: - return 0; - case Alignment::End: - return layout_length - control_length; - default: - UnreachableCode(); - } - }; - - if (orientation_ == Orientation::Horizontal) - { - control->Layout(Rect(Point(current_anchor_length, calculate_anchor(rect.height, size.height)), size)); - current_anchor_length += size.width; - } - else - { - control->Layout(Rect(Point(calculate_anchor(rect.width, size.width), current_anchor_length), size)); - current_anchor_length += size.height; - } - }); - } -} |