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Key repeat simulation for UI navigation

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Henrik Rydgård 2013-12-03 16:47:15 +01:00
parent cbd4a6d758
commit 1b793049d3
1 changed files with 63 additions and 0 deletions
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63
ui/viewgroup.cpp
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@ -1,3 +1,5 @@
#include <set>
#include "base/display.h"
#include "base/functional.h"
#include "base/logging.h"
@ -1058,17 +1060,75 @@ void LayoutViewHierarchy(const UIContext &dc, ViewGroup *root) {
root->Layout();
}
// TODO: Figure out where this should really live.
// Simple simulation of key repeat on platforms and for gamepads where we don't
// automatically get it.
static int frameCount;
struct HeldKey {
int key;
int deviceId;
int startFrame;
bool operator <(const HeldKey &other) const {
if (deviceId < other.deviceId) return true;
if (deviceId > other.deviceId) return false;
if (key < other.key) return true;
return false;
}
bool operator ==(const HeldKey &other) const { return key == other.key && deviceId == other.deviceId; }
};
static std::set<HeldKey> heldKeys;
static const int repeatDelay = 15; // 250ms
static const int repeatInterval = 5; // 66ms
void KeyEvent(const KeyInput &key, ViewGroup *root) {
if (key.flags & KEY_DOWN) {
// We ignore the device ID here. Anything with a DPAD is OK.
if (key.keyCode >= NKCODE_DPAD_UP && key.keyCode <= NKCODE_DPAD_RIGHT) {
lock_guard lock(focusLock);
focusMoves.push_back(key.keyCode);
// Let's only repeat DPAD initially.
HeldKey hk;
hk.key = key.keyCode;
hk.deviceId = key.deviceId;
hk.startFrame = frameCount;
heldKeys.insert(hk);
}
}
if (key.flags & KEY_UP) {
// We ignore the device ID here. Anything with a DPAD is OK.
if (key.keyCode >= NKCODE_DPAD_UP && key.keyCode <= NKCODE_DPAD_RIGHT) {
HeldKey hk;
hk.key = key.keyCode;
hk.deviceId = key.deviceId;
hk.startFrame = 0; // irrelevant
heldKeys.erase(hk);
}
}
root->Key(key);
}
static void ProcessHeldKeys(ViewGroup *root) {
for (auto iter = heldKeys.begin(); iter != heldKeys.end(); ++iter) {
if (iter->startFrame < frameCount - repeatDelay) {
int frame = frameCount - (iter->startFrame + repeatDelay);
if ((frame % repeatInterval) == 0) {
printf("Repeat!\n");
KeyInput key;
key.keyCode = iter->key;
key.deviceId = iter->deviceId;
key.flags = KEY_DOWN;
KeyEvent(key, root);
}
}
}
}
void TouchEvent(const TouchInput &touch, ViewGroup *root) {
EnableFocusMovement(false);
@ -1080,6 +1140,9 @@ void AxisEvent(const AxisInput &axis, ViewGroup *root) {
}
void UpdateViewHierarchy(const InputState &input_state, ViewGroup *root) {
ProcessHeldKeys(root);
frameCount++;
if (!root) {
ELOG("Tried to update a view hierarchy from a zero pointer root");
return;