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Added IsMouseDragging(), GetMouseDragDelta() given button and lock threshold. added io.MouseDragThreshold setting. (#167)

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Removed GetItemActiveDragDelta()
This commit is contained in:
ocornut
2015-03-20 11:13:18 +00:00
parent c070314621
commit 4cd438f663
2 changed files with 31 additions and 19 deletions
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44
imgui.cpp
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@ -577,6 +577,7 @@ ImGuiIO::ImGuiIO()
MousePosPrev = ImVec2(-1,-1);
MouseDoubleClickTime = 0.30f;
MouseDoubleClickMaxDist = 6.0f;
MouseDragThreshold = 6.0f;
UserData = NULL;
// User functions
@ -1840,6 +1841,11 @@ void ImGui::NewFrame()
g.IO.MouseClickedTime[i] = g.Time;
}
g.IO.MouseClickedPos[i] = g.IO.MousePos;
g.IO.MouseDragMaxDistanceSqr[i] = 0.0f;
}
else if (g.IO.MouseDown[i])
{
g.IO.MouseDragMaxDistanceSqr[i] = ImMax(g.IO.MouseDragMaxDistanceSqr[i], ImLengthSqr(g.IO.MousePos - g.IO.MouseClickedPos[i]));
}
}
for (size_t i = 0; i < IM_ARRAYSIZE(g.IO.KeysDown); i++)
@ -2539,16 +2545,29 @@ bool ImGui::IsMouseDoubleClicked(int button)
return g.IO.MouseDoubleClicked[button];
}
bool ImGui::IsMouseDragging(int button, float lock_threshold)
{
ImGuiState& g = *GImGui;
IM_ASSERT(button >= 0 && button < IM_ARRAYSIZE(g.IO.MouseDown));
if (lock_threshold < 0.0f)
lock_threshold = g.IO.MouseDragThreshold;
return g.IO.MouseDragMaxDistanceSqr[button] >= lock_threshold * lock_threshold;
}
ImVec2 ImGui::GetMousePos()
{
return GImGui->IO.MousePos;
}
ImVec2 ImGui::GetMouseDragDelta()
ImVec2 ImGui::GetMouseDragDelta(int button, float lock_threshold)
{
ImGuiState& g = *GImGui;
if (g.IO.MouseDown[0])
return g.IO.MousePos - g.IO.MouseClickedPos[0]; // Assume we can only get active with left-mouse button (at the moment).
IM_ASSERT(button >= 0 && button < IM_ARRAYSIZE(g.IO.MouseDown));
if (lock_threshold < 0.0f)
lock_threshold = g.IO.MouseDragThreshold;
if (g.IO.MouseDown[button])
if (g.IO.MouseDragMaxDistanceSqr[button] >= lock_threshold * lock_threshold)
return g.IO.MousePos - g.IO.MouseClickedPos[button]; // Assume we can only get active with left-mouse button (at the moment).
return ImVec2(0.0f, 0.0f);
}
@ -2581,17 +2600,6 @@ bool ImGui::IsAnyItemActive()
return g.ActiveId != 0;
}
ImVec2 ImGui::GetItemActiveDragDelta()
{
if (ImGui::IsItemActive())
{
ImGuiState& g = *GImGui;
if (g.IO.MouseDown[0])
return g.IO.MousePos - g.IO.MouseClickedPos[0]; // Assume we can only get active with left-mouse button (at the moment).
}
return ImVec2(0.0f, 0.0f);
}
ImVec2 ImGui::GetItemRectMin()
{
ImGuiWindow* window = GetCurrentWindow();
@ -9417,11 +9425,13 @@ void ImGui::ShowTestWindow(bool* opened)
if (ImGui::TreeNode("Dragging"))
{
// You can use ImGui::GetItemActiveDragDelta() to query for the dragged amount on any widget.
static ImVec2 value(0.0f, 0.0f);
static ImVec2 value_raw(0.0f, 0.0f);
static ImVec2 value_with_lock_threshold(0.0f, 0.0f);
ImGui::Button("Drag Me");
if (ImGui::IsItemActive())
{
value = ImGui::GetItemActiveDragDelta();
value_raw = ImGui::GetMouseDragDelta(0, 0.0f);
value_with_lock_threshold = ImGui::GetMouseDragDelta(0);
//ImGui::SetTooltip("Delta: %.1f, %.1f", value.x, value.y);
// Draw a line between the button and the mouse cursor
@ -9430,7 +9440,7 @@ void ImGui::ShowTestWindow(bool* opened)
draw_list->AddLine(ImGui::CalcItemRectClosestPoint(ImGui::GetIO().MousePos, true, -2.0f), ImGui::GetIO().MousePos, ImColor(ImGui::GetStyle().Colors[ImGuiCol_Button]), 2.0f);
draw_list->PopClipRect();
}
ImGui::SameLine(); ImGui::Text("Value: %.1f, %.1f", value.x, value.y);
ImGui::SameLine(); ImGui::Text("Raw (%.1f, %.1f), WithLockThresold (%.1f, %.1f)", value_raw.x, value_raw.y, value_with_lock_threshold.x, value_with_lock_threshold.y);
ImGui::TreePop();
}
}