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WIP Menus: minor cleanup using a ImGuiSimpleColumns helper type (#126)

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This commit is contained in:
ocornut 2015-05-11 20:34:52 +01:00
parent 7fb704d308
commit ba7a4fc034
1 changed files with 41 additions and 32 deletions
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73
imgui.cpp
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@ -992,6 +992,37 @@ struct ImGuiGroupData
float BackupLogLinePosY;
};
// Simple column measurement currently used for menu items
struct ImGuiSimpleColumns
{
int Count;
float Width;
float Pos[8], NextWidths[8];
ImGuiSimpleColumns() { Count = 0; Width = 0.0f; memset(Pos, 0, sizeof(Pos)); memset(NextWidths, 0, sizeof(NextWidths)); }
void Update(int count, float spacing, bool clear)
{
Count = count;
Width = 0.0f;
if (clear)
memset(NextWidths, 0, sizeof(NextWidths));
for (int i = 0; i < Count; i++)
{
if (i > 0 && NextWidths[i] > 0.0f)
Width += spacing;
Pos[i] = (float)(int)Width;
Width += NextWidths[i];
NextWidths[i] = 0.0f;
}
}
void Extend(float w0, float w1, float w2) // not using va_arg because they promote float to double
{
NextWidths[0] = ImMax(NextWidths[0], w0);
NextWidths[1] = ImMax(NextWidths[1], w1);
NextWidths[2] = ImMax(NextWidths[2], w2);
}
};
// Temporary per-window data, reset at the beginning of the frame
struct ImGuiDrawContext
{
@ -1016,9 +1047,6 @@ struct ImGuiDrawContext
ImVector<ImGuiGroupData> GroupStack;
ImGuiColorEditMode ColorEditMode;
ImGuiStorage* StateStorage;
float MenuTotalWidth; // Simplified columns storage for menu items
float MenuColumnsCurr[3];
float MenuColumnsNextWidth[3];
int StackSizesBackup[6]; // Store size of various stacks for asserting
float ColumnsStartX; // Indentation / start position from left of window (increased by TreePush/TreePop, etc.)
@ -1044,9 +1072,6 @@ struct ImGuiDrawContext
LastItemHoveredAndUsable = LastItemHoveredRect = false;
ColorEditMode = ImGuiColorEditMode_RGB;
StateStorage = NULL;
MenuTotalWidth = 0.0f;
memset(MenuColumnsCurr, 0, sizeof(MenuColumnsCurr));
memset(MenuColumnsNextWidth, 0, sizeof(MenuColumnsNextWidth));
memset(StackSizesBackup, 0, sizeof(StackSizesBackup));
ColumnsStartX = 0.0f;
@ -1296,6 +1321,7 @@ struct ImGuiWindow
ImRect ClippedRect; // = ClipRectStack.front() after setup in Begin()
int LastFrameDrawn;
float ItemWidthDefault;
ImGuiSimpleColumns MenuColumns; // Simplified columns storage for menu items
ImGuiStorage StateStorage;
float FontWindowScale; // Scale multiplier per-window
ImDrawList* DrawList;
@ -3624,18 +3650,7 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
window->DC.TreeDepth = 0;
window->DC.StateStorage = &window->StateStorage;
window->DC.GroupStack.resize(0);
window->DC.MenuTotalWidth = 0.0f;
for (size_t n = 0; n < IM_ARRAYSIZE(window->DC.MenuColumnsCurr); n++)
{
if (!window_was_visible)
window->DC.MenuColumnsNextWidth[n] = 0.0f;
if (n > 0 && window->DC.MenuColumnsNextWidth[n] > 0.0f)
window->DC.MenuTotalWidth += style.ItemInnerSpacing.x;
window->DC.MenuColumnsCurr[n] = window->DC.MenuTotalWidth;
window->DC.MenuTotalWidth += window->DC.MenuColumnsNextWidth[n];
window->DC.MenuColumnsNextWidth[n] = 0.0f;
}
window->MenuColumns.Update(3, style.ItemInnerSpacing.x, !window_was_visible);
if (window->AutoFitFrames > 0)
window->AutoFitFrames--;
@ -7364,26 +7379,22 @@ bool ImGui::MenuItem(const char* label, const char* shortcut, bool selected)
ImVec2 pos = ImGui::GetCursorScreenPos();
const ImVec2 label_size = CalcTextSize(label, NULL, true);
const ImVec2 shortcut_size = shortcut ? CalcTextSize(shortcut, NULL) : ImVec2(0.0f, 0.0f);
window->DC.MenuColumnsNextWidth[0] = ImMax(window->DC.MenuColumnsNextWidth[0], label_size.x + (shortcut_size.x > 0.0f ? g.FontSize : 0.0f)); // Feedback to next frame
window->DC.MenuColumnsNextWidth[1] = ImMax(window->DC.MenuColumnsNextWidth[1], shortcut_size.x);
window->DC.MenuColumnsNextWidth[2] = ImMax(window->DC.MenuColumnsNextWidth[2], (float)(int)(g.FontSize * 1.20f + 0.5f));
window->MenuColumns.Extend(label_size.x, shortcut_size.x, g.FontSize * 1.20f); // Feedback for next frame
const float avail_w = window->Pos.x + ImGui::GetContentRegionMax().x - window->DC.CursorPos.x;
const float menu_w = window->DC.MenuTotalWidth; // Feedback from previous frame
const float w = ImMax(avail_w, menu_w);
const float extra_w = w - menu_w;
const float w = ImMax(avail_w, window->MenuColumns.Width); // Feedback from previous frame
const float extra_w = w - window->MenuColumns.Width;
bool pressed = ImGui::Selectable(label, false, ImVec2(w, 0.0f));
if (shortcut_size.x > 0.0f)
{
ImGui::PushStyleColor(ImGuiCol_Text, g.Style.Colors[ImGuiCol_TextDisabled]);
RenderText(pos + ImVec2(window->DC.MenuColumnsCurr[1] + extra_w, 0.0f), shortcut, NULL, false);
RenderText(pos + ImVec2(window->MenuColumns.Pos[1] + extra_w, 0.0f), shortcut, NULL, false);
ImGui::PopStyleColor();
}
if (selected)
RenderCheckMark(pos + ImVec2(window->DC.MenuColumnsCurr[2] + extra_w, 0.0f), window->Color(ImGuiCol_Text));
RenderCheckMark(pos + ImVec2(window->MenuColumns.Pos[2] + extra_w, 0.0f), window->Color(ImGuiCol_Text));
return pressed;
}
@ -7412,13 +7423,11 @@ bool ImGui::BeginMenu(const char* label)
const ImVec2 pos = ImGui::GetCursorScreenPos();
const ImVec2 label_size = CalcTextSize(label, NULL, true);
window->MenuColumns.Extend(label_size.x, 0.0f, g.FontSize * 1.20f); // Feedback to next frame
const float w = window->DC.MenuTotalWidth; // Feedback from next frame
window->DC.MenuColumnsNextWidth[0] = ImMax(window->DC.MenuColumnsNextWidth[0], label_size.x); // Feedback to next frame
window->DC.MenuColumnsNextWidth[2] = ImMax(window->DC.MenuColumnsNextWidth[2], (float)(int)(g.FontSize * 1.20f + 0.5f));
const float w = window->MenuColumns.Width; // Feedback from next frame
ImGui::Selectable(label, opened, ImVec2(w, 0.0f));
RenderCollapseTriangle(pos + ImVec2(window->DC.MenuTotalWidth - g.FontSize, 0.0f), false);
RenderCollapseTriangle(pos + ImVec2(w - g.FontSize, 0.0f), false);
bool hovered = ImGui::IsItemHovered();
if (!opened && hovered)